Patent Description:
Development of a TWS (True Wireless Stereo, true wireless stereo) wireless Bluetooth headset technology brings numerous sensors to a TWS headset, resulting in increasingly high integration of headset elements and increasingly deficient space inside the headset.

To obtain a good uplink call effect and meet a requirement of picking up an ANC (Active Noise Cancellation, active noise cancellation) feedback signal, a microphone is usually disposed between a loudspeaker (also referred to as a horn) and an ear canal. The microphone is configured to pick up a surrounding noise signal and reversely transmit the noise signal to the loudspeaker by using a circuit. The reverse noise signal that is output by the loudspeaker cancels out a noise signal directly entering the ear, to reduce the noise.

<FIG> is a schematic diagram of a cross section of an existing (noise cancellation) headset. The headset includes a first housing <NUM>' and a second housing <NUM>'. A magnetic circuit system <NUM>' of a loudspeaker <NUM>' is disposed in the first housing <NUM>'. A membrane <NUM>' of the loudspeaker <NUM>' and the second housing <NUM>' form a front cavity <NUM>' of the loudspeaker <NUM>'. The loudspeaker <NUM>' and a microphone <NUM>' are independently disposed components. The microphone <NUM>' is fastened to a PCB (Printed Circuit Board, printed circuit board) <NUM>'. The PCB <NUM>' is disposed outside the second housing <NUM>'. The loudspeaker <NUM>' and the PCB <NUM>' are electrically connected by using an FPC (Flexible Printed Circuit, flexible printed circuit) (not shown in the diagram). The front cavity <NUM>' of the loudspeaker <NUM>' is squeezed due to a way of disposing the microphone <NUM>', and consequently a cross-sectional area of an acoustic radiation tube <NUM>' of the front cavity <NUM>' is reduced, thereby affecting a high-frequency response of the loudspeaker <NUM>' and deteriorating a high-frequency sound effect of the headset.

Therefore, a microphone-loudspeaker combined module, a headset, and a terminal device are in urgent need to resolve the foregoing problem.

<CIT> describes a structural arrangement for a radio communication terminal incorporating a loudspeaker and earpiece.

<CIT> describes a production of ambient noise-cancelling earphones.

In view of the problem in the background, an objective of this application is to provide a microphone-loudspeaker combined module, a headset, and a terminal device, to resolve a problem that a loudspeaker and a microphone occupy large space.

The present invention is defined by the subject-matter of the independent claim <NUM>.

According to a first aspect, a technical solution of this application provides a microphone-loudspeaker combo module according to claim <NUM>.

The microphone and the loudspeaker are disposed integrally. Compared with separate arrangement of the microphone and the loudspeaker, this integral arrangement can further improve space utilization of the microphone and the loudspeaker.

In a possible design, the microphone and the loudspeaker form a first integrated body, where the first integrated body includes:.

The microphone rear cavity is formed among the first bottom wall, the first side wall, the second side wall, and the first membrane, the loudspeaker rear cavity is formed among the first bottom wall, the first side wall, the second side wall, and the second membrane, and there is a gap between the first membrane and the second membrane.

The microphone front cavity is formed on a side of the first membrane opposite to the microphone rear cavity, and the loudspeaker front cavity is formed on a side of the second membrane opposite to the loudspeaker rear cavity. In this way, noise can be picked up by the first membrane and a sound can be made by the second membrane. In addition, because another end of the second membrane is a free end, vibration amplitude of the second membrane is greater than that of the first membrane.

In a possible design, there is a plurality of first membranes, and there is a gap between two adjacent first membranes, thereby facilitating vibration of the first membrane.

In a possible design, there is a plurality of second membranes, and there is a gap between two adjacent second membranes, thereby facilitating vibration of the second membrane.

In a possible design, the microphone and the loudspeaker form a second integrated body, where the second integrated body includes:.

The microphone rear cavity is formed among the second bottom wall, the fourth side wall, and the first membrane, the loudspeaker rear cavity is formed among the second bottom wall, the third side wall, the fourth side wall, and the second membrane, and there is a gap between the first membrane and the second membrane.

In a possible design, there is one first membrane disposed at the center of the second integrated body. Considering that the microphone of the headset is mainly configured to pick up external noise, a cross-sectional area of the first membrane does not need to be very large, for example, the first membrane may be at the center of the second integrated body.

In a possible design, the microphone and the loudspeaker are made by using a MEMS process, thereby facilitating integration of the microphone and the loudspeaker.

In a possible design, the microphone, the loudspeaker, and the signal processing unit are fastened to the PCB by using an SMT process, thereby resolving a problem of sound effect inconsistency caused by a difference in manually assembled modules of the entire machine, and improving product reliability.

In a possible design, the signal processing unit includes:.

In a possible design, the first signal processing unit includes an ASIC chip, and the second signal processing unit includes a DSP chip. The ASIC chip is used to drive the microphone and the loudspeaker, and the DSP chip is used to reversely process an electrical signal of noise.

In a possible design, a first through hole is disposed on the PCB, a second through hole is disposed on the loudspeaker, and the first through hole communicates with the second through hole, to ensure a pressure balance between the loudspeaker rear cavity and the environment.

According to a second aspect, a technical solution of this application provides a headset, including:.

A rear cavity of the microphone and the loudspeaker is formed between the first housing and the PCB, and a front cavity of the microphone and the loudspeaker is formed between the second housing and the PCB. In this way, the microphone and the loudspeaker can share the front cavity, thereby improving space utilization of the microphone and the loudspeaker.

In a possible design, the second housing includes an ear-in part, a sound output hole is disposed in the ear-in part, the sound output hole communicates with the front cavity, and a damping net is disposed in the ear-in part. A high-frequency sound made by the loudspeaker can be filtered out by setting the damping net, thereby making a bass effect of the headset more remarkable.

In a possible design, the second housing further includes a first stepped part connected to the ear-in part, and the loudspeaker and the microphone are disposed in an internal cavity of the first stepped part; and
an inner diameter of the first stepped part is greater than that of the ear-in part, to increase a volume of the front cavity to a maximum extent.

In a possible design, the second housing further includes a second stepped part connected to the first stepped part, and the second stepped part is fastened to the first housing; and
an inner diameter of the second stepped part is greater than that of the first stepped part, a step is disposed in the second stepped part, and the PCB is fastened to the step, to accommodate the microphone-loudspeaker combined module.

According to a third aspect, a technical solution of this application provides a terminal device, including the microphone-loudspeaker combined module described above, to reduce space occupied by the microphone and the loudspeaker on the terminal device.

It can be learned that, in the foregoing aspects, the microphone front cavity of the microphone communicates with the loudspeaker front cavity of the loudspeaker, so that the microphone and the loudspeaker can share the front cavity, thereby improving space utilization of the microphone and the loudspeaker, and resolving a problem that the loudspeaker and the microphone occupy large space.

The accompanying drawings herein are incorporated into the specification and form a part of the specification, show embodiments conforming to this application, and are used together with the specification to explain a principle of this application.

To better understand the technical solutions of this application, the following describes embodiments of this application in detail with reference to the accompanying drawings.

The terms used in embodiments of this application are merely for the purpose of illustrating specific embodiments, and are not intended to limit this application. The terms "a", "the" and "this" of singular forms used in the embodiments and the appended claims of this application are also intended to include plural forms, unless otherwise specified in the context clearly.

It should be noted that, position words such as "above", "below", "left", and "right" described in embodiments of this application are described from angles shown in the accompanying drawings, and should not be construed as a limitation on embodiments of this application. Moreover, in the context, it also should be understood that, when it is mentioned that one element is connected "above" or "below" another element, it cannot only be directly connected "above" or "below" the another element, but also be indirectly connected "above" or "below" the another element by using an intermediate element.

In a related technology, some terminal devices have functions of picking up a sound and making a sound, in other words, have acoustic components such as a microphone and a loudspeaker. However, these acoustic components are independently disposed components on the terminal device, and occupy large internal space of the terminal device.

To resolve the foregoing technical problem, an embodiment of this application provides a terminal device. A microphone-loudspeaker combined module is disposed on the terminal device. The microphone-loudspeaker combined module can integrate a microphone and a loudspeaker on a PCB, to reduce space occupied by the microphone and the loudspeaker. The terminal device may be, for example, a head-mounted device (specifically AR glasses or VR glasses); or may be, for example, a portable device (specifically a headset, a mobile phone, or a wristband); or may be certainly another product having a sound pickup function and a sound making function, and enumeration is not performed herein.

For example, the terminal device may be a headset. In an implementation solution, the headset may be a TWS (True Wireless Stereo, true wireless stereo) wireless Bluetooth headset.

<FIG> is a schematic exploded view of a headset according to an embodiment of this application. The headset includes a first housing <NUM> and a second housing <NUM>. Space for accommodating a microphone-loudspeaker combined module <NUM> is formed between the first housing <NUM> and the second housing <NUM>. The microphone-loudspeaker combined module <NUM> includes a loudspeaker <NUM>, a microphone <NUM>, and a PCB <NUM>. The loudspeaker <NUM> and the microphone <NUM> are fastened to the PCB <NUM>. A signal processing unit configured to process an electrical signal, for example, a signal processing chip, may be further disposed on the PCB <NUM>. The loudspeaker <NUM> and the microphone <NUM> are electrically connected to the signal processing unit by using the PCB <NUM> separately. In an implementation, the signal processing unit may include a first signal processing unit and a second signal processing unit. For example, the first signal processing unit is a first signal processing chip <NUM>, and the second signal processing unit is a second signal processing chip <NUM>. The loudspeaker <NUM> and the microphone <NUM> are electrically connected to the first signal processing chip <NUM> by using the PCB <NUM> separately, and the first signal processing chip <NUM> is electrically connected to the second signal processing chip <NUM> by using the PCB <NUM>. The first signal processing unit can match output impedance of the microphone <NUM> and achieve a more balanced effect for call and audio quality. The second signal processing unit can reversely process an electrical signal of noise to implement active noise cancellation. For a detailed working process, refer to the following description.

In some implementations, the loudspeaker <NUM>, the microphone <NUM>, the first signal processing chip <NUM>, and the second signal processing chip <NUM> are all welded on the PCB <NUM>, for example, by using an SMT (Surface Mount Technology, surface mount technology).

In some implementations, the first signal processing chip <NUM> includes but is not limited to an ASIC (Application-Specific Integrated Circuit, application-specific integrated circuit) chip, and may further include, for example, an FPGA (Field Programmable Gate Array, field programmable gate array) chip or a DSP (Digital Signal Processor, digital signal processor) chip.

In some implementations, the second signal processing chip <NUM> includes but is not limited to a DSP chip, and may further include, for example, an FPGA chip, or a BT SOC (Bluetooth System on Chip, Bluetooth system on chip, in other words, Bluetooth chip) integrated with a DSP chip (or an FPGA chip).

It should be noted that, by using an example in which the first signal processing chip <NUM> includes an ASIC chip, the first signal processing chip <NUM> may include one ASIC chip. The ASIC chip can match output impedance of the microphone <NUM> and achieve a more balanced effect for call and audio quality. It may be understood that the first signal processing chip <NUM> may alternatively include two ASIC chips. The front ASIC chip can match output impedance of the microphone <NUM>, and the back ASIC chip can achieve a more balanced effect for call and audio quality.

<FIG> is a schematic diagram of a cross section of a headset according to an embodiment of this application. A rear cavity <NUM> of a loudspeaker <NUM> and a microphone <NUM> is formed between a first housing <NUM> and a PCB <NUM>, and a front cavity <NUM> of the loudspeaker <NUM> and the microphone <NUM> is formed between a second housing <NUM> and the PCB <NUM>. In other words, the PCB <NUM> divides space accommodating a microphone-loudspeaker combined module <NUM> into the rear cavity <NUM> and the front cavity <NUM>. The loudspeaker <NUM> and the microphone <NUM> share the front cavity <NUM> to improve space utilization of the loudspeaker <NUM> and the microphone <NUM>. In addition, because the loudspeaker <NUM> is disposed in the front cavity <NUM>, the front cavity <NUM> is not squeezed, and a cross-sectional area of a acoustic radiation tube is not reduced. Therefore, not only internal space of the headset is saved, but also a high-frequency sound effect of the loudspeaker <NUM> can be ensured.

In some implementations, the second housing <NUM> includes an ear-in part <NUM> for inserting into a human ear canal, a sound output hole <NUM> is disposed in the ear-in part <NUM>, and a sound made by the loudspeaker <NUM> can be transmitted to a human ear through the front cavity <NUM> and the sound output hole <NUM>. Because a soft rubber sleeve (not shown in the diagram) is disposed outside the ear-in part <NUM>, there may be a gap between the soft rubber sleeve and the human ear due to insufficient sealing property. External noise may enter the sound output hole <NUM> from the outside through the gap, then enter the front cavity <NUM>, and then be picked up by the microphone <NUM>. Alternatively, external noise may be picked up by the microphone <NUM> through the sound output hole <NUM> and the front cavity <NUM>. The microphone <NUM> processes a sound signal, for example, may convert the sound signal into an electrical signal, and transfers the electrical signal to a first signal processing chip <NUM> for processing. An audio electrical signal generated after processing by the first signal processing chip <NUM> is transferred to a second signal processing chip <NUM> for reverse processing. The loudspeaker <NUM> converts an electrical signal obtained after the reverse processing into a sound signal for sending, to implement active noise cancellation. In an implementation, the electrical signal is transferred through the PCB <NUM>.

In some implementations, the second housing <NUM> further includes a first stepped part <NUM> connected to the ear-in part <NUM>, and the loudspeaker <NUM> and the microphone <NUM> are disposed in an internal cavity of the first stepped part <NUM>. The first stepped part <NUM> is located at a part in which the headset is not inserted into or just inserted in the ear canal. An inner diameter of the first stepped part <NUM> is greater than that of the ear-in part <NUM>, and the front cavity <NUM> includes the internal cavity of the first stepped part <NUM>. In this way, by disposing the first stepped part <NUM>, a volume of the front cavity <NUM> can be increased to a maximum extent.

In some implementations, a damping net <NUM> is disposed in the front cavity <NUM>. For example, the damping net <NUM> may be fastened to an inner wall of the ear-in part <NUM> in a bonding manner. By disposing the damping net <NUM>, a high-frequency sound made by the loudspeaker <NUM> can be filtered out, thereby making a low bass effect of the headset more remarkable. In an implementation, the damping net <NUM> may be made of an electromagnetic shielding material, for example, conductive rubber or conductive foam, to improve an electromagnetic shielding capability of the microphone <NUM>. In an implementation, the damping net <NUM> is closer to a side of the human ear canal, so that dust can be prevented from entering a side wall of the sound output hole <NUM> and staining the sound output hole <NUM> to a maximum extent.

In some implementations, the second housing <NUM> further includes a second stepped part <NUM> connected to the first stepped part <NUM>, and the second stepped part <NUM> is fastened to the first housing <NUM>. In an implementation, a step 123a is disposed in the second stepped part <NUM>, and the PCB <NUM> is fastened to the step 123a, for example, through welding or bonding. An inner diameter of the second stepped part <NUM> is greater than that of the first stepped part <NUM>, to accommodate the microphone-loudspeaker combined module <NUM>.

The following describes a specific structure and a design manner of the microphone-loudspeaker combined module <NUM>.

<FIG> and <FIG> are schematic diagrams of structures of a microphone-loudspeaker combined module according to an example not covered by the claims. <FIG> is a schematic diagram of a structure of a microphone-loudspeaker combined module <NUM> from a first perspective. <FIG> is a schematic diagram of a structure of a microphone-loudspeaker combined module <NUM> from a second perspective. The microphone-loudspeaker combined module includes a loudspeaker <NUM>, a microphone <NUM>, and a PCB <NUM>. The loudspeaker <NUM> and the microphone <NUM> are fastened to the PCB <NUM> separately. A signal processing unit for processing an electrical signal, for example, a signal processing chip, is disposed on the PCB <NUM>. The loudspeaker <NUM> and the microphone <NUM> are electrically connected to the signal processing chip by using the PCB <NUM> separately. In an implementation, the signal processing unit may include a first signal processing unit and a second signal processing unit, for example, a first signal processing chip <NUM> and a second signal processing chip <NUM>. The loudspeaker <NUM> and the microphone <NUM> are electrically connected to the first signal processing chip <NUM> by using the PCB <NUM> separately, and the first signal processing chip <NUM> is electrically connected to the second signal processing chip <NUM> by using the PCB <NUM>. A first through hole <NUM> communicating with the loudspeaker <NUM> is further disposed on the PCB <NUM>, to ensure a pressure balance between a loudspeaker rear cavity and the environment (for a specific process, refer to the description in <FIG>).

In some examples, both the loudspeaker <NUM> and the microphone <NUM> are made by using a MEMS (Micro-Electro-Mechanical System, micro-electro-mechanical system) process. The loudspeaker <NUM> and the microphone <NUM> made by using the MEMS process have advantages such as a small size, light weight, low power consumption, high reliability, high sensitivity, and easy integration, thereby facilitating integration of the loudspeaker <NUM> and the microphone <NUM>.

<FIG> is a schematic diagram of communication between the loudspeaker <NUM>, the microphone <NUM>, and the signal processing chip that are shown in <FIG> and <FIG>. Specifically, a microphone driving module <NUM>, a signal processing module <NUM>, and a loudspeaker driving module <NUM> are integrated in the first signal processing chip <NUM>. The microphone driving module <NUM> is electrically connected to the microphone <NUM>, and configured to receive an electrical signal sent by the microphone <NUM> (because the microphone <NUM> may be piezoelectric, noise may be converted into an electrical signal by the microphone <NUM>). The microphone driving module <NUM> is electrically connected to the signal processing module <NUM>, and the signal processing module <NUM> can process the electrical signal sent by the microphone driving module <NUM> (including, for example, matching output impedance of the microphone <NUM>). The signal processing module <NUM> is electrically connected to the second signal processing chip <NUM>, and the second signal processing chip <NUM> reversely processes the electrical signal sent by the signal processing module <NUM>. The loudspeaker driving module <NUM> is electrically connected to the second signal processing chip <NUM> and the loudspeaker <NUM> separately. The loudspeaker driving module <NUM> is configured to transmit the electrical signal sent by the second signal processing chip <NUM> to the loudspeaker <NUM>. The loudspeaker <NUM> is configured to convert the electrical signal sent by the loudspeaker driving module <NUM> into a sound signal for sending, to implement active noise cancellation.

<FIG> is a schematic diagram of a cross section of the microphone-loudspeaker combined module <NUM> shown in <FIG> and <FIG>. In this implementation, the loudspeaker <NUM> and the microphone <NUM> may be located on a second side of the PCB <NUM>, and the first signal processing chip <NUM> and the second signal processing chip <NUM> may be located on a first side of the PCB <NUM>.

<FIG> is another schematic diagram of a cross section of the microphone-loudspeaker combined module <NUM> shown in <FIG> and <FIG>. In this implementation, the loudspeaker <NUM>, the microphone <NUM>, and the first signal processing chip <NUM> may be located on a second side of the PCB <NUM>, and the second signal processing chip <NUM> may be located on a first side of the PCB <NUM>.

In this implementation, the microphone <NUM> and the loudspeaker <NUM> are disposed separately, to be specific, are independently and differently disposed perpendicularly to a sound output direction, to improve space utilization of the microphone <NUM> and the loudspeaker <NUM>.

It should be noted that, provided that the first signal processing chip <NUM> is electrically connected to the loudspeaker <NUM> and the microphone <NUM> separately, whether the first signal processing chip <NUM> is located on a same side or on an opposite side of the loudspeaker <NUM> and the microphone <NUM> is not specifically limited in this application. In an implementation, an electrical signal and/or transmission of an electrical signal may be completed by using the PCB <NUM>.

The following separately describes specific structures of the loudspeaker <NUM> and the microphone <NUM> shown in <FIG>.

<FIG> is a schematic diagram of a structure for matching between the microphone <NUM> and the PCB. The microphone <NUM> includes a housing <NUM>, a first membrane <NUM>, and a first substrate <NUM> for supporting the first membrane <NUM>. The housing <NUM> and the first substrate <NUM> are fastened to a first PCB <NUM>. For example, the housing <NUM> is fastened to the first substrate <NUM>, and the first substrate <NUM> is fastened to the first PCB <NUM>. For another example, the housing <NUM> is fastened to the first PCB <NUM>, and the first substrate <NUM> is fastened to the first PCB <NUM>, for example, by welding. Then, the microphone <NUM> is fastened to the PCB <NUM> by using the first PCB <NUM>, for example, by soldering. In an implementation, the first membrane <NUM> and the first substrate <NUM> may be integrally etched with a monocrystalline or polycrystalline silicon material. Then a piezoelectric material (for example, a ceramic material) is sprayed on the etched first membrane <NUM>, or a piezoelectric ceramic sheet is covered on the etched first membrane <NUM>, to produce a piezoelectric microphone.

A microphone front cavity <NUM> is formed among the housing <NUM>, the first membrane <NUM>, the first substrate <NUM>, and the first PCB <NUM>, and a microphone rear cavity <NUM> is formed among the first membrane <NUM>, the first substrate <NUM>, and the first PCB <NUM>. A sound port <NUM> communicating with the microphone front cavity <NUM> is disposed on the housing <NUM>. A sound is transferred to the first membrane <NUM> of the microphone <NUM> through the sound port <NUM>, so that the first membrane <NUM> is bent with a change in pressure.

In this implementation, the first membrane <NUM> and the first substrate <NUM> may be made of a monocrystalline or polycrystalline silicon material. Then a piezoelectric material (for example, a ceramic material) is sprayed on the first membrane <NUM>, or a piezoelectric ceramic sheet is covered on the etched first membrane <NUM>. When the first membrane <NUM> is bent, the first membrane <NUM> generates an electrical signal. The first signal processing chip <NUM> electrically connected to the microphone <NUM> may process such electrical signals. In an implementation, the electrical signal is transferred by using the first substrate <NUM>, the first PCB <NUM>, and the PCB <NUM>. This way is simpler and more convenient, without using a wire connection or providing a channel for a wire to pass on the housing <NUM>.

In addition, alternatively, the first signal processing chip <NUM> and the microphone <NUM> may be electronically connected by using a wire.

In this implementation, the housing <NUM> is disposed in an approximately quadrangular prism shape with a rectangular top. The housing <NUM> may be made of metal (choices of metal materials may include stainless steel, aluminum, aluminum alloy, copper, copper alloy, iron, iron alloy, and the like), plastics (choices of plastics may include hard plastics such as ABS, POM, PS, PMMA, PC, PET, PBT, and PPO) and other alloy materials. In this way, arrangement stability of the housing <NUM> can be improved, thereby effectively improving practicability, reliability, and durability of the housing <NUM>. In an implementation, the housing <NUM> may be made of a metal material, so that an electromagnetic shielding effect of the microphone <NUM> is more remarkable, thereby improving an electromagnetic anti-interference capability of the microphone <NUM>.

In this implementation, external noise enters the headset from the sound output hole <NUM> (refer to <FIG>), and is picked up by the microphone <NUM>. The microphone <NUM> converts the picked-up noise signal into an electrical signal. The electrical signal is processed by the first signal processing chip <NUM> and then sent to the second signal processing chip <NUM>. The second signal processing chip <NUM> reversely processes the noise electrical signal, and then transmits the noise electrical signal to the loudspeaker <NUM> by using the first signal processing chip <NUM>. The loudspeaker <NUM> outputs a sound signal opposite to the noise according to the reverse noise electrical signal transmitted from the first signal processing chip <NUM>. The sound signal opposite to the noise cancels out the noise directly entering the ear, thus providing a good noise cancellation effect.

<FIG> is a schematic diagram of a structure for matching between the loudspeaker <NUM> and the PCB <NUM>. The loudspeaker <NUM> includes a second membrane <NUM> and a second substrate <NUM> for supporting the second membrane <NUM>, and the second substrate <NUM> is fastened to the PCB <NUM>, for example, by welding. The second substrate <NUM> includes a bottom wall <NUM> and a side wall <NUM>. A loudspeaker rear cavity <NUM> is formed among the second membrane <NUM>, the bottom wall <NUM>, and the side wall <NUM> (or between the second membrane <NUM> and the second substrate <NUM>). A loudspeaker front cavity <NUM> is formed on a side of the second membrane <NUM> opposite to the loudspeaker rear cavity <NUM>. The loudspeaker front cavity <NUM> communicates with the microphone front cavity <NUM> (refer to <FIG>), so that the microphone <NUM> and the loudspeaker <NUM> can share the front cavity, thereby improving space utilization of the microphone <NUM> and the loudspeaker <NUM>, and resolving a problem that the loudspeaker and the microphone occupy a large space.

In an implementation, the second membrane <NUM> and the second substrate <NUM> may be integrally etched by using a monocrystalline or polycrystalline silicon material. Then a piezoelectric material (for example, a ceramic material) is sprayed on the etched second membrane <NUM>, or a piezoelectric ceramic sheet is covered on the etched first membrane <NUM>. Therefore, the first signal processing chip <NUM> electrically connected to the loudspeaker <NUM> can excite the second membrane <NUM>, so that the second membrane <NUM> vibrates relative to the second substrate <NUM> to make a sound. To be specific, the loudspeaker <NUM> can first convert an electrical signal into a mechanical deformation, and then convert the mechanical deformation into a sound signal, to make a sound.

In this implementation, to ensure a pressure balance between the loudspeaker rear cavity <NUM> and the environment when the second membrane <NUM> vibrates, one or more second through holes <NUM> communicating with the first through hole <NUM> are disposed on the bottom wall <NUM>. The first through hole <NUM> extends through a first side <NUM> and a second side <NUM> of the PCB <NUM>. For the pressure balance, when the second membrane <NUM> lowers, air may flow from the loudspeaker rear cavity <NUM>, through the second through hole <NUM> and the first through hole <NUM>, to the outside of the first side <NUM> of the PCB <NUM> (because the first side <NUM> of the PCB <NUM> communicates with the environment). Similarly, when the second membrane <NUM> rises, air may flow from the outside of the first side <NUM> of the PCB <NUM>, through the first through hole <NUM> and the second through hole <NUM>, into the loudspeaker rear cavity <NUM>.

<FIG> is another schematic diagram of a structure for matching between a loudspeaker <NUM> and a PCB <NUM>, and <FIG> is a top view of a second membrane <NUM> of the loudspeaker <NUM> shown in <FIG>. The loudspeaker <NUM> differs from the loudspeaker <NUM> shown in <FIG> in that one end of the second membrane <NUM> is fastened to the side wall <NUM> and another end is a free end (a cantilever structure).

As shown in <FIG>, in this implementation, a gap <NUM> is provided between two adjacent second membranes <NUM>, to facilitate vibration of each second membrane <NUM>. The loudspeaker <NUM> is configured to make a sound, and the microphone <NUM> is mainly configured to pick up external noise. Therefore, vibration amplitude of the second membrane <NUM> may be greater than that of the first membrane <NUM>. In an implementation, bending amplitude of the second membrane <NUM> using the structure shown in <FIG> is greater than that of the second membrane <NUM> using the structure shown in <FIG>, so that the second membrane <NUM> makes a larger range of sounds.

Refer again to <FIG>. In a circular region, to ensure consistency of vibration amplitude of each second membrane <NUM>, in an implementation, the second membranes <NUM> are sector structures with a same cross-sectional area, and there may be six second membranes <NUM>, to fill the circular region to a greater extent. Certainly, the circular region may be in another shape, for example, a rectangle. To match the rectangular region, the second membrane <NUM> may be a triangular structure, and there may be four second membranes <NUM>, to fill the rectangular region to a greater extent.

Refer again to <FIG>. In this example, the microphone <NUM> is fastened to the PCB <NUM> by using the first PCB <NUM>, specifically, in an SMT patch manner. Similarly, the first signal processing chip <NUM> and the loudspeaker <NUM> may also be fastened to the PCB <NUM> in an SMT patch manner, thereby resolving a problem of sound effect inconsistency caused by a difference in manually assembled modules of the entire machine, and improving product reliability.

It should be noted that, because the second membrane <NUM> of the loudspeaker <NUM> is made of a monocrystalline or polycrystalline silicon material (using a high temperature resistance property of the silicon material), the loudspeaker <NUM> can also be fastened in an SMT patch manner. However, in the related technology, the loudspeaker is fastened to the PCB in a common welding or bonding manner because a membrane of a microphone in the related technology is made of a material, for example, PET, PEN, or PEI. The material is not high temperature resistant, and therefore, an SMT patch process may not be used.

Moreover, both the first membrane <NUM> and the second membrane <NUM> are made of a piezoelectric material (for example, a ceramic material), thereby improving waterproof and dustproof capabilities of the headset. In addition, compared with a moving coil-driven loudspeaker and a microphone, the loudspeaker <NUM> and the microphone <NUM> provided in this example can pick up a sound and make a sound separately by using a characteristic of the piezoelectric material, without generating a coupling noise between the loudspeaker <NUM> and the microphone <NUM>, thereby resolving a problem of electrical signal interference generated by a close-range combination of the conventional moving coil loudspeaker and the microphone.

<FIG> are schematic diagrams of structures of a microphone-loudspeaker combined module <NUM> according to Embodiment <NUM> of this application. <FIG> is a schematic diagram of a structure of the microphone-loudspeaker combined module <NUM> from a first perspective. <FIG> is a schematic diagram of a structure of the microphone-loudspeaker combined module <NUM> from a second perspective. A difference between the microphone-loudspeaker combined modules <NUM> shown in this embodiment and in Embodiment <NUM> lies in that the loudspeaker <NUM> and the microphone <NUM> are integrated into one component (referred to as "a first integrated body").

<FIG> are schematic diagrams of structures when the loudspeaker <NUM> and the microphone <NUM> are integrated into the first integrated body. <FIG> is a schematic diagram of a structure of the first integrated body from a first perspective. <FIG> is a schematic diagram of a structure of the first integrated body from a second perspective. The first integrated body includes a first bottom wall <NUM>, a first side wall <NUM> and a second side wall <NUM> (refer to <FIG>) separately connected to the first bottom wall <NUM>, a first membrane <NUM>, and a second membrane <NUM>. The first side wall <NUM> is disposed on the first bottom wall <NUM> to form a cavity. The second side wall <NUM> is disposed on the first bottom wall <NUM>. The second side wall <NUM> is located inside the first side wall <NUM>. The second side wall <NUM> is connected to the first side wall <NUM> to form a cavity. In an implementation, there may be one or more first membranes <NUM> and there may be one or more second membranes <NUM>. The quantity of the first membrane <NUM> and the second membrane <NUM> shown in <FIG> is merely an example. It may be understood that the first integrated body has at least one first membrane <NUM> and at least one second membrane <NUM>. In this implementation, there is a gap <NUM> between two adjacent membranes (the first membrane <NUM> and the second membrane <NUM>, the first membrane <NUM> and the first membrane <NUM>, or the second membrane <NUM> and the second membrane <NUM>).

<FIG> is a schematic diagram of a partial structure of the microphone <NUM> in <FIG>. <FIG> is a schematic diagram of a partial structure of the loudspeaker <NUM> in <FIG>. In this implementation, the first side wall <NUM> is disposed outside the second side wall <NUM> and is connected to the second side wall <NUM>. The first membrane <NUM> is fastened to the first side wall <NUM> and the second side wall <NUM>. One end of the second membrane <NUM> is fastened to the first side wall <NUM> and another end is a free end (a cantilever structure).

In this implementation, a microphone rear cavity is formed among the first bottom wall <NUM>, the first side wall <NUM>, the second side wall <NUM>, and the first membrane <NUM>, and a microphone front cavity is formed on a side of the first membrane <NUM> opposite to the microphone rear cavity. A loudspeaker rear cavity is formed among the first bottom wall <NUM>, the first side wall <NUM>, the second side wall <NUM>, and the second membrane <NUM>, and a loudspeaker front cavity is formed on a side of the second membrane <NUM> opposite to the loudspeaker rear cavity. Because vibration amplitude of the second membrane <NUM> may be greater than that of the first membrane <NUM>, a pressure change caused by vibration of the second membrane <NUM> is also remarkable. To ensure a pressure balance between the loudspeaker rear cavity and the environment when the second membrane <NUM> vibrates, in an implementation, a second through hole <NUM> communicating with the first through hole <NUM> (refer to <FIG> and <FIG>) is disposed on the first bottom wall <NUM>.

In this implementation, the first bottom wall <NUM> and the first side wall <NUM> and the second side wall <NUM> that are separately connected to the first bottom wall <NUM> may be made of a monocrystalline or polycrystalline silicon material, to transfer an electrical signal generated by the first membrane <NUM> to the PCB <NUM>, or transfer an electrical signal received from the PCB <NUM> to the second membrane <NUM>.

In this implementation, the first bottom wall <NUM> may be a circular structure (refer to <FIG>), the first side wall <NUM> may be a cylindrical cavity (refer to <FIG>), and the second side wall <NUM> may be a folded-line structure. The second side wall <NUM> and the first side wall <NUM> form a sector cavity (refer to <FIG>). The first membrane <NUM> formed on the first side wall <NUM> and the second side wall <NUM> may be a sector structure (refer to <FIG>). The second membrane <NUM> formed on the first side wall <NUM> may be a sector structure (refer to <FIG> and <FIG>). A total quantity of the first membrane <NUM> and the second membrane <NUM> may be six, to evenly divide the circle into six sector structures. It may be understood that the first bottom wall <NUM> may be alternatively a square structure or a structure of another shape. Specific shapes of the first side wall <NUM>, the second side wall <NUM>, the first membrane <NUM>, and the second membrane <NUM> may be correspondingly designed according to the specific shape of the first bottom wall <NUM>. This is not specifically limited in this application.

<FIG> is a schematic diagram of a structure of the first membrane <NUM> and the second membrane <NUM> shown in <FIG>. When the first bottom wall <NUM> is a circular structure and a total quantity of the first membrane <NUM> and the second membrane <NUM> is six (six sector structures), the six sector structures are defined as: a first sector structure 20a, a second sector structure 20b, a third sector structure 20c, a fourth sector structure 20d, a fifth sector structure 20e, and a sixth sector structure 20f. The combination of forming the first membrane <NUM> and the second membrane <NUM> may be as follows: The first sector structure 20a is the first membrane <NUM>, and the remaining sector structures are the second membrane <NUM>. The first sector structure 20a and the fourth sector structure 20d are the first membrane <NUM>, and the remaining sector structures are the second membrane <NUM>. The first sector structure 20a, the third sector structure 20c, and the fifth sector structure 20e are the first membrane <NUM>, and the remaining sector structures are the second membrane <NUM>. The first sector structure 20a and the second sector structure 20b are the first membrane <NUM>, and the remaining sector structures are the second membrane <NUM>. Certainly, other combination forms are also included, and are not exhaustively described in this application, provided that one or more of the sector structures are the first membrane <NUM> and the remaining sector structures are the second membrane <NUM>.

In this implementation, the microphone <NUM> and the loudspeaker <NUM> are disposed integrally. Compared with separate arrangement of the microphone <NUM> and the loudspeaker <NUM>, this integral arrangement can further improve space utilization of the microphone <NUM> and the loudspeaker <NUM>.

<FIG> is a schematic diagram of a structure when the loudspeaker <NUM> and the microphone <NUM> are integrated into a second integrated body. <FIG> is a schematic diagram of a cross section of the second integrated body. <FIG> is a schematic diagram of another cross section of the second integrated body. Refer to <FIG>. The second integrated body includes a second bottom wall <NUM>, a third side wall <NUM> and a fourth side wall <NUM> that are separately connected to the second bottom wall <NUM>, a first membrane <NUM>, and a second membrane <NUM>. The third side wall <NUM> is disposed on the second bottom wall <NUM> to form a cavity. The fourth side wall <NUM> is disposed on the second bottom wall <NUM> to form a cavity. The fourth side wall <NUM> is located inside the third side wall <NUM>. One end of the second membrane <NUM> is fastened to the third side wall <NUM> and another end is a free end (a cantilever structure). The first membrane <NUM> is fastened to the fourth side wall <NUM>. In an implementation, there is one first membrane <NUM> and six second membranes <NUM>. The six second membranes <NUM> are evenly distributed on the periphery of the first membrane <NUM>. In this implementation, gaps <NUM> are provided between two adjacent second membranes <NUM>, and between the first membrane <NUM> and the second membrane <NUM>.

In this implementation, the second bottom wall <NUM> may be a circular structure, the third side wall <NUM> may be a cylindrical cavity, and the fourth side wall <NUM> may be a polyhedral (for example, hexahedral) cavity. The first membrane <NUM> formed on the fourth side wall <NUM> may be a polygonal (for example, hexagonal) structure, and the second membrane <NUM> formed on the third side wall <NUM> may be a trapecio-circular-like (for example, an edge of a trapecio circular close to the first membrane <NUM> is changed from a curve to a straight line) structure. There may be one first membrane <NUM> and six second membranes <NUM>, to divide the circle into a hexagonal structure and six trapecio-circular-like structures evenly distributed around the hexagonal structure.

In an implementation, the second bottom wall <NUM> may be a circular structure, the third side wall <NUM> may be a cylindrical cavity, the fourth side wall <NUM> may be a cylindrical cavity, the first membrane <NUM> formed on the fourth side wall <NUM> may be a circular structure, and the second membrane <NUM> formed on the third side wall <NUM> may be a trapecio circular structure. There may be one first membrane <NUM> and six second membranes <NUM>, to divide the circle into a circular structure and six trapecio circular structures evenly distributed around the circular structure. It may be understood that the second bottom wall <NUM> may be alternatively a square structure or a structure of another shape. Specific shapes of the third side wall <NUM>, the fourth side wall <NUM>, the first membrane <NUM>, and the second membrane <NUM> may be correspondingly designed according to the specific shape of the second bottom wall <NUM>. This is not specifically limited in this application.

In this implementation, a microphone rear cavity is formed among the second bottom wall <NUM>, the fourth side wall <NUM>, and the first membrane <NUM>, and a microphone front cavity is formed on a side of the first membrane <NUM> opposite to the microphone rear cavity. A loudspeaker rear cavity is formed among the second bottom wall <NUM>, the third side wall <NUM>, the fourth side wall <NUM>, and the second membrane <NUM>, and a loudspeaker front cavity is formed on a side of the second membrane <NUM> opposite to the loudspeaker rear cavity.

In this implementation, the first membrane <NUM> is disposed at the center of the second integrated body. Because the microphone <NUM> of the headset is mainly configured to pick up external noise and the main purpose of the headset is to enable the loudspeaker <NUM> to make a sound, a cross-sectional area of the second membrane <NUM> of the loudspeaker <NUM> needs to be greater than that of the first membrane <NUM> of the microphone <NUM>.

It may be understood that, provided that the cross-sectional area of the second membrane <NUM> is greater than that of the first membrane <NUM>, specific design shapes and fastening manners of the first membrane <NUM> and the second membrane <NUM> are not specifically limited.

<FIG> is a schematic diagram of a cross section of the microphone-loudspeaker combined module <NUM> shown in <FIG>. For example, the loudspeaker <NUM> and the microphone <NUM> in <FIG> are shown as the second integrated body shown in <FIG>. In this implementation, the second integrated body is disposed on a second side <NUM> of the PCB <NUM>, and a first signal processing chip <NUM> and a second signal processing chip <NUM> are disposed on a first side <NUM> of the PCB <NUM>. In some implementation solutions, the first signal processing chip <NUM> and the second signal processing chip <NUM> may be disposed separately.

<FIG> is another schematic diagram of a cross section of the microphone-loudspeaker combined module <NUM> shown in <FIG>. For example, the loudspeaker <NUM> and the microphone <NUM> in <FIG> are shown as the second integrated body shown in <FIG>. In this implementation, the second integrated body is disposed on a second side <NUM> of the PCB <NUM>, and a first signal processing chip <NUM> and a second signal processing chip <NUM> are disposed on a first side <NUM> of the PCB <NUM>. In some implementation solutions, the first signal processing chip <NUM> and the second signal processing chip <NUM> may be integrally disposed onto a cover <NUM>. For example, the first signal processing chip <NUM> and the second signal processing chip <NUM> may be encapsulated in the cover <NUM> in a SIP (System in Package, system-in-package) encapsulation manner.

It may be understood that the microphone-loudspeaker combined module <NUM> shown in <FIG> may also use a SIP encapsulation manner. For example, SIP encapsulation may be performed on the first signal processing chip <NUM> and the second signal processing chip <NUM> in the microphone-loudspeaker combined module <NUM> shown in <FIG>, or the microphone <NUM> and the loudspeaker <NUM> may be encapsulated. For another example, SIP encapsulation may be performed on the microphone <NUM>, the loudspeaker <NUM>, and the first signal processing chip <NUM> in the microphone-loudspeaker combined module <NUM> shown in <FIG>.

In this implementation, external noise enters the headset from the sound output hole <NUM> (refer to <FIG>) and is picked up by the microphone <NUM>, to cause the first membrane <NUM> to bend with a change in pressure. When the first membrane <NUM> bends, an electrical signal is generated. The generated electrical signal is transmitted to the PCB <NUM> by using the second side wall <NUM> and the first bottom wall <NUM> (or using the fourth side wall <NUM> and the second bottom wall <NUM>), and then to the first signal processing chip <NUM> on the PCB <NUM>. The first signal processing chip <NUM> processes the electrical signal and transmits the processed electrical signal to the second signal processing chip <NUM> for reverse processing. The reversely processed electrical signal is transmitted to the PCB <NUM>, the first bottom wall <NUM>, the first side wall <NUM>, and the second membrane <NUM> (or to the PCB <NUM>, the second bottom wall <NUM>, the third side wall <NUM>, and the second membrane <NUM>) by using the first signal processing chip <NUM>. The second membrane <NUM> outputs a sound signal opposite to the noise according to the reverse noise electrical signal transmitted from the first signal processing chip <NUM>. The sound signal opposite to the noise cancels out the noise directly entering the car, thereby fulfilling a good noise cancellation function.

<FIG> and <FIG> are schematic diagrams of structures of a microphone-loudspeaker combined module <NUM> according to Embodiment <NUM> of this application. <FIG> is a schematic diagram of a structure of the microphone-loudspeaker combined module <NUM> from a first perspective. <FIG> is a schematic diagram of a structure of the microphone-loudspeaker combined module <NUM> from a second perspective. A difference between the microphone-loudspeaker combined modules <NUM> shown in this embodiment and in Embodiment <NUM> lies in that the loudspeaker <NUM>, the microphone <NUM>, and the first signal processing chip <NUM> are integrated into one component. Specifically, in this embodiment, the loudspeaker <NUM>, the microphone <NUM>, and the first signal processing chip <NUM> are all located on a second side of the PCB <NUM>.

Compared with the microphone-loudspeaker combined module <NUM> shown in Embodiment <NUM> (for example, <FIG>), the loudspeaker <NUM> and the microphone <NUM> in Embodiment <NUM> are electrically connected to the first signal processing chip <NUM> after being integrated into the first integrated body or the second integrated body.

For example, <FIG> is a schematic diagram of a cross section of the microphone-loudspeaker combined module <NUM> shown in <FIG> and <FIG> shows a location relationship between the first signal processing chip <NUM> and the second integrated body integrated by the loudspeaker <NUM> and the microphone <NUM>. To be specific, the loudspeaker <NUM>, the microphone <NUM>, and the first signal processing chip <NUM> are all located on a second side of the PCB <NUM>.

For another example, <FIG> is another schematic diagram of a cross section of the microphone-loudspeaker combined module <NUM> shown in <FIG> and <FIG>. <FIG> shows a location relationship between the first signal processing chip <NUM> and the second integrated body integrated by the loudspeaker <NUM> and the microphone <NUM>. To be specific, the loudspeaker <NUM>, the microphone <NUM>, and the first signal processing chip <NUM> are all located on a second side of the PCB <NUM>. In some implementation solutions, the microphone-loudspeaker combined module <NUM> shown in <FIG> implements SIP encapsulation of the microphone <NUM>, the loudspeaker <NUM>, and the first signal processing chip <NUM>. It should be noted that, in this implementation, because the cover <NUM> is disposed outside the microphone-loudspeaker combined module <NUM>, a third through hole 40a communicating with the microphone-loudspeaker combined module <NUM> needs to be provided on the cover <NUM>, so that air flows into or out of the cover <NUM> through the third through hole 40a.

It may be understood that, in this embodiment, an integration manner of the loudspeaker <NUM> and the microphone <NUM> (a manner of integrating into the first integrated body or the second integrated body) is consistent with that in Embodiment <NUM>, and details are not described herein again.

Refer to <FIG>. In Embodiment <NUM> and Embodiment <NUM>, the loudspeaker <NUM> and the microphone <NUM> are integrated into one part: the first integrated body or the second integrated body. Compared with that in Embodiment <NUM>, this integral arrangement can increase a volume of the loudspeaker front cavity. Therefore, favorable conditions can be further provided for functions such as sound pickup in the ear canal, active noise cancellation, and uplink noise cancellation.

<FIG> is a schematic exploded view of a microphone-loudspeaker combined module <NUM> according to another example. In this implementation, a PCB <NUM> includes a second PCB <NUM> and a third PCB <NUM>. In other words, the microphone-loudspeaker combined module <NUM> includes a loudspeaker <NUM>, a microphone <NUM>, a signal processing unit, the second PCB <NUM>, and the third PCB <NUM>. The signal processing unit may include a first signal processing unit and a second signal processing unit, for example, a first signal processing chip <NUM> and a second signal processing chip <NUM> (the second signal processing chip <NUM> is not shown in <FIG>).

For a specific structure of the microphone <NUM>, refer to <FIG>. The microphone <NUM> is fastened to the second PCB <NUM> by using the first PCB <NUM>, and the signal processing unit (for example, the first signal processing chip <NUM>) is fastened to the second PCB <NUM>. In an implementation, both the microphone <NUM> and the signal processing unit are fastened to the second PCB <NUM> by using an SMT process. The loudspeaker <NUM> is disposed between the second PCB <NUM> and the third PCB <NUM>, so that the microphone <NUM> and the loudspeaker <NUM> are assembled and molded, to be specific, the microphone <NUM> and the loudspeaker <NUM> may be independently and differently disposed along a sound output direction. In this implementation, the loudspeaker <NUM> includes a driving system <NUM>, a membrane <NUM>, and a bracket <NUM>.

The bracket <NUM> is disposed between the second PCB <NUM> and the third PCB <NUM>, and functions to protect the loudspeaker <NUM> and support the membrane <NUM>. In an implementation, the bracket <NUM> may be made of a material, for example, iron, aluminum alloy, or ABS plastic, to ensure good strength.

The membrane <NUM> is disposed on the bracket <NUM>, and the second PCB <NUM> is disposed along a sound output direction of the membrane <NUM> (in front of the membrane <NUM>). The second PCB <NUM> cannot only integrate the microphone <NUM> and the first signal processing chip <NUM>, but also protect the membrane <NUM> because the second PCB <NUM> is disposed in front of the membrane <NUM>.

A loudspeaker front cavity is formed between the membrane <NUM> and the second PCB <NUM>. A sound outlet <NUM> is provided with the second PCB <NUM>. The loudspeaker front cavity communicates with a microphone front cavity through the sound outlet <NUM>. In addition, the sound outlet <NUM> may also communicate with the front cavity <NUM> (refer to <FIG>).

The driving system <NUM> is provided on the third PCB <NUM> and configured to drive the membrane <NUM> to vibrate. The driving system <NUM> may use a moving coil type or a piezoelectric type. When the driving system <NUM> uses the moving coil type, the driving system <NUM> is a magnetic circuit system (a specific structure thereof is not shown in the diagram), and a voice coil (not shown in the diagram) of the membrane <NUM> is inserted into the driving system <NUM>. Since the driving manner may be the conventional technology, a specific composition of the magnetic circuit system and a manner of setting the voice coil and the second membrane <NUM> are not described herein. When the driving system <NUM> uses the piezoelectric type, refer to <FIG> or <FIG> for a specific structure of the driving system <NUM>. The center (the bottom end) of the membrane <NUM> is attached to the second membrane <NUM>, so that vibration of the second membrane <NUM> drives the membrane <NUM> to vibrate to make a sound. The sound is sent from the sound outlet <NUM> disposed at the center of the second PCB <NUM>.

The second PCB <NUM> and the third PCB <NUM> are separately fastened to two ends of the bracket <NUM>, and the driving system <NUM> is fastened to the third PCB <NUM>. When the driving system <NUM> uses the piezoelectric type, the driving system <NUM> may be fastened to the third PCB <NUM> by using an SMT process.

In this implementation, the microphone <NUM> and the loudspeaker <NUM> are disposed separately, to be specific, are independently and differently disposed along a sound output direction, to improve space utilization of the microphone <NUM> and the loudspeaker <NUM>.

In conclusion, the microphone-loudspeaker combined module <NUM> is provided in examples and Embodiments <NUM> to Embodiment <NUM> of this application. The examples show structural forms in which the microphone <NUM> and the loudspeaker <NUM> are disposed separately. Embodiment <NUM> and Embodiment <NUM> show structural forms in which the microphone <NUM> and the loudspeaker <NUM> are disposed integrally. In this application, the loudspeaker <NUM>, the microphone <NUM>, and the signal processing unit are integrated, thereby reducing space occupied by the loudspeaker <NUM>, the microphone <NUM>, and the signal processing unit. Because the loudspeaker <NUM> is disposed in the front cavity <NUM>, the front cavity <NUM> is not squeezed, and a cross-sectional area of the acoustic radiation tube is not reduced, thereby improving a high-frequency sound effect of the headset.

Claim 1:
A microphone-loudspeaker combined module, comprising:
a microphone (<NUM>), having a microphone front cavity (<NUM>);
a loudspeaker (<NUM>), having a loudspeaker front cavity (<NUM>), wherein the microphone front cavity (<NUM>) communicates with the loudspeaker front cavity (<NUM>); and
a PCB (<NUM>), wherein the PCB (<NUM>) comprises the microphone (<NUM>) and the loudspeaker (<NUM>), and the microphone (<NUM>) and the speaker are located on a same side of the PCB (<NUM>); wherein the PCB (<NUM>) further comprises a signal processing unit, and the microphone (<NUM>) and the loudspeaker (<NUM>) are electrically connected to the signal processing unit separately;
characterized in that the microphone (<NUM>) and the loudspeaker (<NUM>) are disposed integrally.