Abstract:
A tactile sound device in proximate contact with a user, comprising a multistage arrangement of vibrotactile materials to impart visceral sensations to a user. The device imparts a physical sensation via a multistage arrangement of vibrotactile materials embodied in a wearable or seated configuration, in response to a wired or wireless signal input.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    The present application claims priority benefit under 35 §119(e) of U.S. Provisional Patent Application No. 61/871,101, entitled “Tactile Sound Device,” filed Aug. 28, 2013, the contents of which are incorporated herein by reference in their entirety; of U.S. Provisional Patent Application No. 61/919,020, entitled “Wearable Tactile Sound Device,” filed Dec. 20, 2013, the contents of which are incorporated herein by reference in their entirety; and of U.S. Provisional Patent Application No. 61/991,831, entitled “Wearable Tactile Sound Device,” filed May 12, 2014, the contents of which are incorporated herein by reference in their entirety. 
     
    
     TECHNICAL FIELD 
       [0002]    The present invention relates generally to a tactile sound device. More particularly, the present invention relates to a tactile sound device comprising a multistage arrangement of vibrotactile materials to impart visceral sensations to a user. Specifically, the present invention relates to imparting a physical sensation via a multistage arrangement of vibrotactile materials embodied in wearable or seated setups in response to a wired or wireless electrical signal input. 
       BACKGROUND 
       [0003]    For literally hundreds of years, people have enjoyed music, both playing the music and listening to the music. In recent years, the types of music available for listening has expanded exponentially, as has the equipment by which the user can listen to the music. Often, the equipment by which a user can hear, or listen to, the music can be located in the same room where the user is located and the playback of the music can be controlled by the user. 
       SUMMARY 
       [0004]    According to certain embodiments, there is provided a tactile sound device aimed at providing a visceral sensation via a multistage vibrotactile membrane. The inventors of the present invention have discovered that the type, density, shape and arrangement of various materials employed as vibrotactile membranes in a tactile sound device greatly affects the transfer of a visceral sensation and the overall subjective user experience, despite the fact that the same electroactive transducers, electrical components and other settings may remain constant. Particular embodiments therefore comprise specific arrangements and types of vibrotactile materials that optimize the vibratory field of a tactile sound device to provide the highest level of subjective user experience. Certain embodiments provide for an optimal vibratory field for users who have their back placed against the tactile sound device. 
         [0005]    In one embodiment, a tactile sound device is provided intended for use in a seated position, wherein of the tactile sound device is a textile, polymer or plastic enclosure. Other embodiments include straps to secure the sound device or enclosure to a chair, and clasps to integrate into seats specifically designed for the sound device or enclosure. In another embodiment, a self-contained tactile sound device is provided that can be embedded inside a seat (for instance a computer chair or a car seat), either during the time of manufacture or after sale of the sound device. 
         [0006]    In a particular embodiment, a tactile sound device is provided for use with the user in a standing position, the tactile sound device having a textile, polymer or plastic enclosure with straps. Another embodiment provides a tactile sound device integrated into a backpack on the side proximal to the wearer&#39;s back. Yet another embodiment is provided wherein a tactile sound device can be inserted into the sleeve of a backpack. A further embodiment is provided wherein a tactile sound device can be snapped onto a backpack or garment on the side of the backpack or garment that is proximal to the wearer&#39;s back, utilizing clasps designed for that purpose. Another embodiment is provided wherein a purpose-built bag containing a tactile sound device has a mechanism to snap on a storage compartment to form a full backpack. A further embodiment provides a tactile sound device that can strap onto any backpack. 
         [0007]    In certain embodiments, a tactile sound device vest is provided, including one or more units of multistage tactile membranes to provide a visceral sensation on the front, back and/or sides of the wearer. Another embodiment is provided where one or more multistage tactile membranes can be incorporated into multiple positions in or on a garment. Vet another embodiment is a multipurpose tactile sound device insert that can be integrated into other garments, devices, or products. 
         [0008]    In accordance with certain embodiments, there is provided a visceral sensation to the user through the sound device in response to output of bass frequencies at a live event. Additional embodiments for providing a visceral sensation is a wearable tactile audio device that receives input signals from integrated or modular wireless connections, or via a wired connection, such as USB protocol. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    The accompanying drawings, which are incorporated herein and form part of the specification, illustrate various embodiments of the present disclosure and, together with the description, further serve to explain the principles of the disclosure and to enable a person skilled in the pertinent art to make and use the embodiments disclosed herein. In the drawings, like reference numbers indicate identical or functionally similar elements. 
           [0010]      FIG. 1  illustrates s a side view of the multistage vibrotactile membrane assembly. 
           [0011]      FIG. 2  illustrates a top view of a multistage vibrotactile membrane assembly for a seated configuration. 
           [0012]      FIG. 3  illustrates a top view of a multistage vibrotactile membrane assembly for a wearable configuration. 
           [0013]      FIG. 4  is a flowchart illustrating the flow of signals processed by a tactile sound device to provide visceral sensation to the user in response to audio input. 
           [0014]      FIG. 5  illustrates a perspective view of a circuit board in accordance to the embodiment  FIG. 4 . 
           [0015]      FIG. 6  illustrates a perspective view of a tactile sound device for use in a seated configuration. 
           [0016]      FIG. 7  illustrates a perspective view of a tactile sound device for use in a wearable configuration. 
           [0017]      FIG. 8  illustrates a perspective view of a tactile sound device for use in a backpack configuration. 
           [0018]      FIG. 9  illustrates a perspective view of a tactile sound device for use in a vest configuration. 
           [0019]      FIG. 10  is a flowchart illustrating the flow of signals processed by a tactile sound device to provide visceral tactile sensations to the user in response to sound at a live event. 
       
    
    
     DETAILED DESCRIPTION 
       [0020]    Particular embodiments are directed to the type, density, shape and arrangement of various materials employed as vibrotactile membranes in a tactile sound device for affecting the transfer of a visceral sensation for providing an overall subjective user experience, despite the fact that the same electroactive transducers, electrical components and other settings may remain constant. Present embodiments therefore comprise a specific arrangement and types of vibrotactile materials that optimize the vibratory field of a tactile sound device to provide the highest level of subjective user experience. The present invention thereby facilitates providing an optimal vibratory field for users who have their back placed against the tactile sound device. 
         [0021]    The key to a sought-after improved user experience is the use of a multistage vibrotactile membrane  100  as shown in  FIG. 1 . The conduction of vibration commences with the electroactive transducer  102 , which can be a tactile transducer, a piezoelectric transducer or any mechanism that translates an electric signal into motion. The electroactive transducer  102  directly attaches to the secondary membrane  104  or can be embedded in it. The secondary membrane attaches to the primary membrane  106  which is the side proximal to the user. The vibrations from the electroactive transducer  102  are dampened by the secondary membrane  104  and dissipated across its surface area. The primary membrane  106  then collects and transfers the vibrations to the user&#39;s hack through the cover or coating material. 
         [0022]    The primary membrane  106  comprises a large, rigid membrane that takes up approximately the same surface area as the side of the tactile sound device proximal to the user&#39;s back and also serves a structural role in the invention. Primary membrane  106  may be made of any of a number of thermoplastics, such as polypropylene, HDPE, PVC, and the like, or of composite materials, such as carbon-fibre; but a preferred material is polypropylene. It is important to note that only textiles, thin foams, silicone or other such coatings should be placed between primary membrane  106  and the user&#39;s body to minimize any interference or undesirable vibrational dampening between the user and the primary membrane  106 . 
         [0023]    This secondary microcellular polymer membrane  104  may be made of microcellular elastomers (EVA), urethanes (PU), rubbers, and the like; but is preferably comprised of microcellular polyurethane, which has a greater dampening effect on vibrations (vis-à-vis the primary membrane  106 ). Such dampening effect is desirable to reduce the harsh vibrations of the electroactive transducer  102  to a level that is comfortable to the user and that distributes them across the area of the microcellular foam. The secondary microcellular polymer membrane  104  should contain less surface area than the primary membrane  106  and is preferably provided in an inverted “T” shape  202  as shown in  FIG. 2  if the device is to be used in a seated orientation (i.e. the horizontal portion goes across the user&#39;s pelvis/posterior pelvis, with the vertical portion up the user&#39;s spine and in between the shoulder blades). Ideally, at least one electroactive transducer  204  should be placed on each axis of the inverted “T”  202  (however one tactile electroactive transducer  204  could be used). This arrangement  202  concentrates the transfer of motion along the user&#39;s spine and lower back. If, however, the tactile sound device is to be used in a standing position, then the secondary microcellular polymer membrane  104  is preferably provided in an “I” shape  302  as shown in  FIG. 3  (such that it fits along the spine and in between the shoulder blades of a user). In the “I” shape, a single electroactive transducer  304  can be attached, but preferably two electroactive transducers  304  are utilized. This arrangement  302  concentrates the transfer of motion along the user&#39;s back. 
         [0024]    Note that the primary membrane  106  and the secondary membrane  104  can be combined with one or more layers of similar materials or into a composite material to provide a more controlled gradient of dissipation and transmission. Another layer of materials similar to the primary membrane  106  larger in surface area than the electroactive transducer  102  be used in order to alter the vibratory field of the electroactive transducer  102 . The membranes and the electroactive polymers should be attached using a strong adhesive, such as VHB tape. 
         [0025]    The multistage vibrotactile membrane  100  can be run off an external amplifier; however, in a preferred embodiment, the tactile sound device is supplied with its own circuit assembly. This assembly of the multistage tactile membrane and circuit assembly is hereinafter referred to as  500 . This circuit assembly  400  is shown in  FIG. 4  and  FIG. 5 . The unit receives a wired  402  or wireless  404  audio signal input  406 . An I/O Port  405  can be used to provide input from other sources, for instance USB audio input. One part of this signal is either processed or directly passed  407  through to a headphone output  408 . Another part of this signal  409  is filtered  410  (for example using a low pass filter) to remove frequencies above the frequency response range of the electroactive transducers  412 . This signal is sent to an amplifier  411  (for example an Class D amplifier) which then powers one or more electroactive transducers  412 . The vibrotactile response can is attenuated or amplified using a control either on the unit or on a remote  414 . The unit is powered via a battery which is charged via a DC power input. This embodiment of the tactile sound device containing the tactile sound device and its own circuit assembly  500  can be used in seated and wearable configurations. 
         [0026]    To provide an accurate representation of sound information, for example for music production, the signal  409  is passed from the Digital Signal Processor  407  to  410  unprocessed. To provide an enhanced representation of sound information, compression and bass-boost effects, for gaming and entertainment applications for instance, can be applied in  407  to be passed into  410 . To provide car-engine feedback sounds, for instance to simulate the sensation of driving a combustion-engine car in an electric car, an electrical signal based on environmental criteria via external processing can be sent to  405  and effects can be applied  407  to further enhance that experience. 
         [0027]      FIG. 6  shows an embodiment, for a seated configuration where the tactile sound device can be placed on any chair. The main body  602  comprises the vibrotactile membrane assembly  100  (not shown) inside a textile cover  603 . This circuit assembly  604 ,  414  is outside the unit; however it can be integrated in the main unit  602  as well. Signal input is provided via a wired connection  402  from a portable media player  610 . The unit is powered via a DC power connector  608 . In another embodiment (not shown) of tactile sound device  500 , the rear the unit has buckles that can snap into a chair with matching clasps designed to accommodate such a unit. In another embodiment, (not shown), the tactile sound device  500  is integrated into the back of a chair with the tactile sound device  500  (not shown) on the side of the chair back  802  proximal to the user&#39;s back. 
         [0028]      FIG. 7  shows an embodiment of the tactile sound device  500  (not shown) incorporated in a purpose built wearable bag  700  with straps  702 . A control module  704  is configured to attenuate or amplify the vibrotactile response. Headphones are plugged into the headphone out  408 .  FIG. 8  shows an embodiment of the tactile sound device  500  (not shown) is sealed into a backpack  800  on the side proximal to the wearer&#39;s back  802 . Various embodiments and details of features of tactile sound device backpacks are discussed in U.S. Provisional Application Ser. No. 61/991,831.  FIG. 9  shows a tactile sound device vest  900  incorporating four units of multistage tactile membrane  100  (not shown) and a circuit assembly  400  to power the device. 
         [0029]      FIG. 10  shows the circuit block diagram of an embodiment of a wearable tactile sound device to be used at a live event. This unit receives a source signal, via an integrated or a modular receiver, and translates the low frequencies contained therein directly to the wearer&#39;s/audience member&#39;s body. The audience member  - thus experiences the visceral sensation of loud sub-woofers, without experiencing the pressure waves caused by sound. This allows all audience members who wear the device of the present invention to experience the same visceral experience, regardless of physical proximity to the sound source. The method for providing visceral tactile sensations to the user in response to sound at a live event are found in U.S. Provisional Application Ser. No. 61/919,020 and U.S. Provisional Application Ser. No. 61/871,101. A display,  1220  is present on the exterior shell of tactile sound device and can take signals from  1320 ,  1321 ,  1322 ,  1323 , via  405  to create a centrally controlled tight-show (for instance controlled by a DJ), a pre-programmed light-show (for instance using information from  405 ) or a light show based on characteristics of input signal  406  or output signal  412 .