Patent Publication Number: US-2022240016-A1

Title: Wearable Electronic Device

Description:
This application is a continuation of patent application Ser. No. 16/452,926, filed Jun. 26, 2019, which claims the benefit of provisional patent application No. 62/696,652, filed Jul. 11, 2018, which are hereby incorporated by reference herein in their entireties. 
    
    
     FIELD 
     This relates generally to electronic devices, and, more particularly, to wearable electronic devices. 
     BACKGROUND 
     Electronic devices such as headphones may be worn by people who desire to listen to audio content. Headphones may not, however, be sufficiently comfortable for napping or wearing for long periods of time. 
     SUMMARY 
     A system may include a wearable electronic device and an associated portable electronic device or other host device such as a cellular telephone or computer. The wearable electronic device may gather biometric data from a user while playing audio for the user with speakers or other audio transfer components (e.g., bone conduction transducers that play audio for the user via bone conduction). Biometric data gathered with the wearable electronic device may be transferred to the host device so that reports on the user&#39;s biometric data may be displayed for the user. 
     The wearable electronic device may be formed from a layer of fabric. The fabric may have opposing first and second ends that are configured to receive a user&#39;s ears while the fabric covers the user&#39;s eyes. The ends may have ear openings with triangular edge portions that receive the user&#39;s ears. Tragus openings may be formed in the fabric to accommodate the tragus portions of the user&#39;s ears. A soft central portion of the fabric between the ends may overlap the user&#39;s eyes. Light sources may be placed within the central portion to provide illumination for the user&#39;s eyes. 
     The wearable electronic device may have control circuitry that receives power from a power source. Sensors may be used to gather sensor information such as biometric sensor information. The sensors, control circuitry, and power source may be mounted in a stiff edge portion of the fabric. The stiff edge portion of the fabric may have an elongated strip shape and may extend along an upper edge of the central portion of the fabric. Stiffener structures that are between inner and outer layers of the fabric may be used to support the speakers. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front view of an illustrative wearable electronic device in accordance with an embodiment. 
         FIG. 2  is a schematic diagram of an illustrative system with a wearable electronic device in accordance with an embodiment. 
         FIG. 3  is a front view of an illustrative wearable electronic device with ear holes and speakers in accordance with an embodiment. 
         FIG. 4  is a diagram of a user&#39;s ear on which a portion of a wearable electronic device is being worn in accordance with an embodiment. 
         FIG. 5  is a top view of a head of a user wearing an illustrative wearable electronic device in accordance with an embodiment. 
         FIG. 6  is a side view of an illustrative stiffener for supporting a speaker in a wearable electronic device in accordance with an embodiment. 
         FIG. 7  is a cross-sectional side view of an illustrative speaker in a wearable electronic device in accordance with an embodiment. 
         FIG. 8  is a cross-sectional side view of an illustrative case for a wearable electronic device in accordance with an embodiment. 
         FIG. 9  is a graph of illustrative data that may be gathered with a wearable electronic device and displayed for a user on an associated electronic device in accordance with an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Items that are worn by a user may be formed from materials such as fabric. Fabric items may be light in weight and comfortable. For example, a wearable electronic device may be made of soft thin fabric that allows the device to be worn comfortably while users are sleeping on their sides and that does not press excessively against the users&#39; faces. Sensors may be embedded in wearable electronic devices formed from fabric to monitor the operating environment of the wearable electronic devices and to make biometric measurements for users. 
     An illustrative wearable electronic device is shown in  FIG. 1 . As shown in  FIG. 1 , wearable electronic device  10  may include a body formed from fabric  30 . Fabric  30  may include portions that have different properties. For example, fabric  30  may have reinforced portions that include stiffeners, folded (e.g., doubled-over) portions in which the stiffness of fabric  30  is selectively increased, portions that contain two or more layers of fabric that are coupled with adhesive and/or that have intervening layers of material, additional materials such as foam, polymer, fiber-composite materials, metal, adhesive, and/or other materials. Device  10  may include conductive strands or metal traces on a substrate such as a printed circuit or fabric layer that form signal paths for carrying electrical signals (e.g., wires in fabric  30  and/or attached to a surface of fabric  30 ). In some arrangements, locally softened or stiffened regions may be formed in device  10  (e.g., regions in which fabric  30  has a different construction such as a softer weave or knit, in which fabric  30  is formed from different numbers of layers of intertwined strands of material and/or stiffer and/or softer yarn, regions in which fabric  30  has a stiffer construction and/or includes polymer binder that stiffens fabric  30 , etc.). Fabric  30  may also have portions with openings and/or other portions that have locally modified properties. 
     The outline of wearable electronic device  10  has an elongated rectangular shape in the example of  FIG. 1 , but other wearable electronic device shapes may be used, if desired. For example, the outline of wearable electronic device  10  may have rounded corners, curved edges along the top, bottom, left, and right sides of device  10 , may have a combination of straight and curved edges, may have an oval shape, etc. With the illustrative elongated rectangular shape of  FIG. 1 , opposing left and right end portions  32  may have structures that engage a user&#39;s left and right ears, respectively. These structures may include ear openings in fabric  30  that are configured to receive the user&#39;s ears, hooks, straps, or other ear engagement structures. The central portion of wearable electronic device  10  between ends  32  may be placed across the front of a user&#39;s face to cover the user&#39;s eyes for rest or sleep. If desired, the outline of wearable electronic device  10  may include structures that help accommodate the user&#39;s facial features and enhance comfort. For example, foam may be formed in central portion  42 , foam pads or other soft structures may be formed in areas such as areas  44  that rest to the left and right of the user&#39;s nose, etc. As another example, curved lower edge  46  may be formed to create additional space for the user&#39;s nose and thereby avoid applying too much pressure to the user&#39;s nose. 
     Electrical components may be included in device  10 . For example, speakers or bone conduction transducers may be formed in end portions  32  to provide audio to a user. Electrical components may also be located in the central portion of fabric  30  between end portions  32 . For example, light sources (e.g., light-emitting diodes or other light sources) may be located at locations such as locations  40  that are aligned with the positions of the user&#39;s eyes when device  10  is being worn on a user&#39;s face. Light sources such as these may be used to supply a user with light (e.g., to influence a user&#39;s sleep cycle as part of a light therapy regimen, to serve as an alarm, etc.). If desired, additional light blocking material may be placed over locations  40  and/or elsewhere in central portion (region)  42  (e.g., to help block ambient light in scenarios in which light sources are inactive or are omitted). 
     Fabric  30  may be stretchy, which allows fabric  30  to be tensioned in outward directions D when being worn by a user. To enhance comfort, it may be desirable to enhance the stiffness fabric  30  in a strip running along the upper edge of fabric  30  relative to other portions of fabric  30 . For example, region  34  may have doubled-over portions of fabric  30  and/or other stiffening structures that make an elongated strip-shaped region that extends along the upper edge of fabric  30  stiffer than other, softer, portions of fabric such as the fabric of region  42 . Wien device  10  is being worn on by a user, more of the tension (outward force in directions D) in fabric  30  will therefore be borne by the stiff upper edge portion of fabric  30  than in the softer regions such as region  42 . This allows region  42  to be formed from fabric that is soft and comfortable, while ensuring that sufficient tension can be maintained across the width of fabric  30  so that device  10  is retained on a user&#39;s ears. 
     Because upper edge region  34  of fabric  30  may be stiffer than lower central portion  42 , it may be desirable to locate rigid circuitry in region  34 . For example, integrated circuits, packaged sensors, power sources, and other components may be formed in region  34  (see, e.g., illustrative electrical components  36 ). Circuitry such as components  36  may be interconnected using metal traces on one or more printed circuits (e.g., flexible printed circuits to which components  36  are mounted using solder, conductive adhesive, or other conductive materials), may be interconnected using wires (e.g., wires that have a central conductive strand of metal or other conductive material surrounded by an insulting jacket such as a coating of polymer), may be interconnected by conductive strands (monofilaments and/or multifilament yarn incorporated into fabric  30 ), or other signal path structures. Printed circuits, wires, and other signal path structures may, if desired, be located mostly in region  34  (e.g., so that these structures do not adversely affect the softness of region  42 ). 
     A schematic diagram of an illustrative system that includes a wearable electronic device is shown in  FIG. 2 . Wearable electronic device  10  of system  8  may be used as a stand-alone device (e.g., a device that plays audio for a user and/or that performs other desired functions). If desired, system  8  may include one or more additional device such as electronic device  26 . Devices such as device  26  may communicate with device  10  via wired and/or wireless communications paths (see, e.g., communications link  28 ). During communications, device  26  may provide device  10  with audio. For example, music and other audio may be streamed to device  10  from device  26  and/or audio files may be downloaded from device  26  to device  10  for immediate or future playback. Control information such as user-defined settings for system  8  and other control information may also be sent to device  10  from device  26  and/or sent from device  10  to device  26 . Device  10  may use sensors and other circuitry to gather information on the user of device  10 . This information may include, for example, biometric information (e.g., health data). During communications over link  28 , biometric information and other information on the user of device  10  may be exchanged between device  10  and device  26 . A user may, if desired, view biometric data that has been gathered in graphical format or other formats on a display in device  26 . 
     Device  26  may be a laptop computer, tablet computer, desktop computer, cellular telephone, wristwatch, equipment embedded in a vehicle, building, or other system, a router or other network equipment, a battery case, or other electronic equipment. To form communications link  28 , device  26  and wearable electronic device  10  may be coupled using a wired path (e.g., a cable and associated connectors that temporarily couple device  26  and wearable electronic device  10 ) and/or a wireless path. Wien coupled for communication, device  26  may provide information to wearable electronic device  10  (e.g., audio content, user settings, commands, etc.) and wearable electronic device  10  may provide information to device  26  (e.g., sensor data such as biometric measurements, etc.). Device  26  and device  10  may be coupled continuously or nearly continuously during operation (e.g., device  26  may be coupled to device  10  while a user is sleeping) or may be coupled more briefly (e.g., device  26  may be coupled to device  10  periodically when it is desired to transfer information across link  28 ). Wreless communications may be performed continuously (e.g., when streaming real-time audio) or intermittently. In some arrangements, a user may initiate the establishment of communications link  28  and may use a user interface in device  26  and/or in wearable electronic device  10  to manage the transfer of data and other operations in system  8 . Configurations in which link  28  is formed automatically may also be used. 
     As shown in  FIG. 2 , device  10  may include control circuitry  12 . Control circuitry  12  may include storage and processing circuitry for supporting the operation of device  10  and system  8 . The storage and processing circuitry may include storage such as nonvolatile memory (e.g., flash memory or other electrically-programmable-read-only memory configured to form a solid state drive), volatile memory (e.g., static or dynamic random-access-memory), etc. Processing circuitry in the control circuitry may be used to gather input from sensors and other input devices and may be used to control output devices. The processing circuitry may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors and other wireless communications circuits, power management units, audio chips, application specific integrated circuits, etc. 
     To support communications between device  10  and device  26  and/or to support communications between equipment in system  8  and external electronic equipment (e.g., over a network such as the internet), control circuitry  12  may have communications circuitry  14 . Communications circuitry  14  may include antennas, radio-frequency transceiver circuitry, and other wireless communications circuitry and/or wired communications circuitry. Circuitry  14 , which may sometimes be referred to as control circuitry and/or control and communications circuitry, may, for example, support bidirectional wireless communications between device  10  and device  26  over link  28  (e.g., a wireless local area network link, a near-field communications link, or other suitable wired or wireless communications link (e.g., a Bluetooth® link, a WFi® link, etc.). Device  10  may also include power circuits for transmitting and/or receiving wired and/or wireless power and may include batteries and/or capacitors to store power (see, e.g., power source  24 ). 
     Device  10  may include input output devices  16 . Input-output devices  16  may be used in gathering user input, in gathering information on the environment surrounding the user, in gathering biometric measurements, and/or in providing a user with output. The input-output devices may include sensors such as sensors  18 , speakers such as speakers  20  and other audio output devices such as bone condition transducers, and other devices  22 . 
     Sensors  18  may include force sensors (e.g., strain gauges, capacitive force sensors, resistive force sensors, etc.), audio sensors such as microphones (e.g., microphones to monitor snorting, microphones for active noise cancellation, etc.), touch and/or proximity sensors such as capacitive sensors (e.g., capacitive touch sensors for gathering user touch input to adjust the operation of device  10 , capacitive touch sensors for determining when device  10  is being worn against the skin of a user or is not being worn, etc.), optical sensors such as optical sensors that emit and detect light, and/or other touch sensors and/or proximity sensors, monochromatic and color ambient light sensors, image sensors, sensors for detecting position, orientation, and/or motion (e.g., accelerometers, magnetic sensors such as compass sensors, gyroscopes, and/or inertial measurement units that contain some or all of these sensors), biometric sensors such as muscle activity sensors (EMG) for measuring eye muscle contractions and other muscle contractions, eye motion sensors, blood pressure sensors, heart rate sensors, electrocardiography (ECG) sensors for measuring heart activity, photoplethysmography (PPG) sensors for sensing the rate of blood flow using light, and electroencephalograph (EEG) sensors for measuring electrical activity in the user&#39;s brain, pressure sensors (e.g., force sensors that can detect pressure on the side of a user&#39;s head when the user is resting against a pillow), humidity sensors, temperature sensors, moisture sensors, and/or other sensors. In some arrangements, device  10  may use sensors such as sensors  18  and/or other input-output devices such as input-output devices  16  to gather user input (e.g., buttons may be used to gather button press input, touch sensors overlapping displays can be used for gathering user touch screen input, touch pads may be used in gathering touch input, microphones may be used for gathering audio input, accelerometers may be used in monitoring when a finger contacts an input surface and may therefore be used to gather finger press input, etc.). 
     Device  10  may include speakers  20  or other audio output components for presenting audio to a user. Earbud-shaped portions of device  10  or other structures may be used to help locate speakers  20  (or other audio output devices such as bone conduction transducers) in alignment with the user&#39;s ears (e.g., in and/or aligned with the user&#39;s concha). During operation of device  10 , audio may be provided directly by control circuitry  12  (e.g., audio stored in circuitry  12  may be played back for a user with speakers  20 ) and/or audio may be provided from remote equipment (e.g., circuitry  12  may use communications circuitry  14  to receive audio from device  26 , which circuitry  12  may play for a user via speakers  20 ). 
     Device  10  may also include other devices  22  such as haptic output devices, light-emitting devices such as light-emitting diodes, lasers, electroluminescent devices, and lamps (e.g., light sources located in locations such as locations  40  of  FIG. 1 ), displays, wireless power components (e.g., inductive power coils and rectifiers for receiving wireless power, and/or wireless power transmitting circuitry), heating devices (e.g., ohmic heaters, Peltier effect devices, etc.), cooling devices (e.g., Peltier effect devices), and/or other electrical components. 
     Devices such as device  26  in system  10  may include components such as control circuitry  12 , communications circuitry  14 , input-output devices  16 , power source  24 , and/or other components. 
     An illustrative configuration for wearable electronic device  10  is shown in  FIG. 3 . As shown in  FIG. 3 , end portions  32  of fabric  30  may include openings such as ear openings  50  that are configured to receive the ears of a user. Ear openings  50  may have triangular outer edges  50 E, which allow device  10  to accommodate a wide range of ear shapes and head sizes while maintaining a desired amount of tension in fabric  30 . In this way, fabric  30  can be gently stretched across a user&#39;s face and held in place by the resulting tension from the user&#39;s ears. Because device  10  may be worn across a users face during sleep, device  10  may sometimes be referred to as a sleep mask. 
     Speakers  20  may be mounted adjacent to ear openings  50  in locations that serve to align speakers  20  with the user&#39;s ears (e.g., the user&#39;s conchae). Fabric  30  may, if desired, have openings such as tragus openings  55 . Tragus openings  55  may allow a user&#39;s tragi to protrude through fabric  30  as device  10  is being worn by the user. This may help reduce pressure from fabric  30  on the user&#39;s ears and enhance the comfort of device  10 . Uncomfortable ear pressure may also be alleviated by incorporating soft material such as foam into regions  54  adjacent to ear openings  50  and/or into central portion  42 . 
     Regions  54  may be located between ear openings  50  and adjacent peripheral edge portions of device  10  such as edge portions  52 . Peripheral edge portions  52  in ends  32  may be locally stiffened using two layers of fabric  30  bonded together using adhesive or other stiffening structures. Stiffening structures may also be formed in device  10  that help to support and locate speakers  20  in alignment with a user&#39;s ears. 
     As shown in  FIG. 3 , speakers  20  may be coupled to electrical components such as electrical components  58  using signal paths  62  (e.g., so that audio signals may be provided to speakers  20 ). Component(s)  58  (see, e.g., components  36  of  FIG. 1 ) may include integrated circuits (e.g., audio drivers), wires, and other circuitry (see, e.g., control circuitry  12 , communications circuitry  14 , and input-output devices  16  of  FIG. 2 ). Power for the circuitry of components  58  may be supplied by power source  24  (e.g., a capacitor, battery, or other source of power). Power source  24  and/or associated connectors for coupling to a power supply cable and/or wireless power receiving circuitry may, if desired, be accommodated by forming a protruding portion of fabric  30  along the upper edge of device  10  (as an example). 
     Components  58  may be formed in region  34 , which may be locally stiffened. For example, region  34  may be a strip-shaped region extending along the upper edge of fabric  30  that is stiffened relative to other portions of device  10  such as the portions of device  10  in region  42  using folded fabric, other configurations with multiple fabric layers, arrangements in which a polymer layer, a fiber-composite layer such as a fiberglass layer, a metal layer, or other structures serve to stiffen device  10  in region  34 . If desired, components  58  may be formed in regions such as regions  60  (e.g., regions  60  may include sensors  18  and other components). 
       FIG. 4  is a diagram of an end portion of device  10  showing how ear opening  50  of fabric  30  may fit over a user&#39;s ear (ear  64 ) to hold an end of device  10  in place. In this position, tragus opening  55  is aligned with the user&#39;s tragus  68  so that undesired fabric pressure on tragus  68  is avoided. 
       FIG. 5  is a top view of user  71  and device  10  showing how device  10  may be worn by user  71 . As shown in  FIG. 5 , device  10  may stretch across the face of user&#39;s head  70 , covering the user&#39;s eyes  72 . Device  10  may also cover some or all of the user&#39;s nose  74 . By blocking eyes  72 , device  10  may allow user  71  to sleep or rest even when ambient lighting conditions are bright. To attach device  10  to head  70 , openings  50  at ends  32  of device  10  may be placed over the user&#39;s ears  64  (e.g., so that portions  30 ′ of fabric at the outermost edges of fabric  30  are located behind ears  64 ). In this position, the fabric of device  10  may stretch slightly to create tension in device  10  that helps secure device  10  to ears  64  and hold device  10  over the user&#39;s face (e.g., over eyes  72 ). 
     To allow fabric  30  to stretch, fabric  30  may include strands of material that can accommodate stretching without becoming damaged (e.g., spandex, polyester, other stretchable materials, or combinations of these materials). Fabric  30  may also include less stretchy strands (e.g., fabric  30  may include strands of acrylic or nylon to add strength). Fabric  30  may be formed by any suitable fabric construction technique (weaving, knitting, braiding, etc.) and may include one or more intertwined sublayers. The density of fabric  30  may be sufficient to block bright light from eyes  72  and/or additional layers of material (e.g., an opaque polymer layer, etc.) may be included in device  10  to ensure that device  10  blocks light sufficiently. 
       FIG. 6  is a diagram of an illustrative stiffener of the type that may be incorporated into each end  32  of device  10  (e.g., so that there are separate first and second stiffeners in device  10  separated by a thin soft fabric layer in central portion  42 ). As shown in  FIG. 6 , stiffener  65  may have a diving board shape characterized by a protruding portion such as protruding portion  80  that protrudes from a main portion such as main portion  67 . Protruding portion  80  may be flat (e.g., portion  80  may lie in the same plane as main portion  67 ) or protruding portion  80  may curve toward the user&#39;s head (e.g., upward from the page and therefore upward from the plane in which main portion  67  lies in the origination of  FIG. 6 ). By curving portion  80 , speaker  20  may be biased towards and into the user&#39;s concha when device  10  is worn on the user&#39;s head. Tragus opening  66  may pass through stiffener  65  to help accommodate a user&#39;s tragus. Stiffener  65  may be sandwiched between inner and outer layers of fabric  30  and/or may otherwise be incorporated into device  10 . 
       FIG. 7  is a cross-sectional side view of a portion of device  10  in the vicinity of a left or right speaker. As shown in  FIG. 7 , fabric  30  of device  10  may include outwardly facing fabric such as front fabric layer  30 F on the front face of device  10  and may include inwardly facing fabric such as rear fabric layer  30 R on the opposing rear face of device  10 . Wien being worn on a head of a user, the fabric of layer  30 F, which may sometimes be referred to as an outer fabric layer, may face outwardly and may be viewed by people in the vicinity of the user, whereas the fabric of layer  30 R, which may sometimes be referred to as an inner fabric layer, may face inwardly and may rest against the skin of the user&#39;s face. 
     An earbud-shaped speaker structure may be formed by placing a soft earbud member such as foam member  82  over speaker  20 . Foam member  82  may have a domed shape. The presence of foam member  82  may allow for relative movement between speaker  20  and a stiffener overlapped by speaker  20  (e.g., internal stiffening layer  86 ) and to improve comfort. Member  82  may have an opening to accommodate sound and/or may be formed from open-cell foam that allows sound to pass. Fabric layer  30 R may cover foam  82 . Layer  30 R may be sufficiently thin to allow sound from speaker  20  to pass to the user&#39;s ear and/or an opening may be formed in layer  30 R in alignment with speaker  20 . Adhesive  84  may attach fabric layer  30 R to internal stiffening layer  86 . Stiffening layer  86  may be formed from a layer of material that is stiffer than fabric  30  (e.g., stiffer than fabric layer  30 F and stiffer than fabric layer  30 R). For example, stiffening layer  86  may be formed from a fiber composite material such as fiberglass and/or may be formed from other stiffening structures such as a layer of polymer without embedded fibers, stiff fabric, etc. Stiffening layer  86  may have a diving board shape or may have other suitable shapes and may form a stiffener such as stiffener  65  of  FIG. 6 . An opening in stiffener layer  86  may allow wires or other signal paths  62  to convey audio signals to speaker  20 . Adhesive layer  87  may be interposed between stiffener layer  86  and fabric layer  30 F to attach fabric layer  30 F to stiffener layer  86 . Adhesive layer  87  and/or other attachment mechanisms (e.g., solder, fasteners, etc.) may also be used to attach speaker  20  to stiffener layer  86 . Stiffener layer  86  may be planar as shown in  FIG. 7  or a protruding diving board stiffener formed from layer  86  may be bent downwards towards the user&#39;s ear in direction DW. 
       FIG. 8  is a cross-sectional side view of an illustrative enclosure for device  10 . As shown in  FIG. 8 , enclosure  90 , which may sometimes be referred to as a battery case, cover, holder, etc., may have hinges such as hinges  96  that allow front wall portions  92  to rotate relative to rear wall portion  93 . Clasp  94  may have magnetic structures or mechanical engagement structures to selectively hold portions  92  in a closed position. If desired, hinges  96  may be formed from flexible enclosure wall structures. The walls of enclosure  90  may be formed from fabric, leather, polymer, metal, other materials, or combinations of these materials. Enclosure  90  may include a battery such as battery  98 . After battery  98  is charged using a wired connection or wireless power circuitry that receives wireless power from a wireless power source such as a wireless power charging mat, battery  98  may supply power to device  10  (e.g., to recharge a battery or other power source in device  10 ). For example, power may be supplied from battery  98  to device  10  using a wired path such as wired path  100 . Wreless power arrangements in which enclosure  90  wirelessly transmits power to power source  24  of device  10  may also be used. 
     During the operations of system  8 , user input may be gathered. For example, button press input, touch sensor input, voice command input, force sensor input, and/or other input may be gathered using input-output devices  16  and/or input-output devices in external equipment such as device  26 . The user input may include commands that adjust media playback (e.g., commands such as play, rewind, fast forward, skip track, stop, pause, volume up, volume down, etc.). These media playback commands may be used to adjust the volume used by control circuitry  12  when playing audio for the user with speakers  20  and/or other audio playback settings. 
     The user input may also include commands to start or stop sensor measurements. If, as an example, a user supplies input that directs system  8  to begin a sleep cycle routine, audio may be played from speakers  20  while sensors  18  gather biometric data and other sensor measurements. Biometric data may also be gathered while speakers  20  are inactive or audio may be placed without gathering biometric data. Audio for device  10  may be white noise or other sleep-oriented audio tracks (wave sounds, etc.), may be songs or other music, may include spoken words, or may be any other suitable audio content. 
     Sensor data can be conveyed from device  10  to device  26  after the user&#39;s sleep cycle has completed (e.g., in response to a user supplying a stop command) or can be conveyed periodically or continuously between device  10  and device  26  during the user&#39;s sleep cycle. If desired, light from light sources aligned with the user&#39;s eyes can be provided at appropriate times (e.g., when awakening the user from sleep in the morning at a predetermined alarm time, at times that are chosen to help the user adapt to a new time zone, etc.). Portions of device  10  may also be heated or cooled. 
     Visual feedback, audio feedback, and/or haptic feedback may be provided to the user of system  8  during operation. For example, a touch sensitive display on device  26  may display selectable on-screen options (e.g., a “start” button, a “stop” button, a “snooze” button, a “transfer data” button, a “display sleep report” button, an “adjust options” button, or other selectable options. System  8  may take suitable action in response to user input provide when a user touches a displayed on-screen option or otherwise provides system  8  with a command. For example, device  10  may adjust settings, may initiate or stop data gathering, may play appropriate audio, provide appropriate light output, heat output, cooling output, haptic output, and/or other output while gathering user input, environmental sensor measurements, biometric sensor measurements, and/or other input and may provide confirmatory messages (“monitoring your sleep,” “alarm snoozed,” “recording paused,” etc.). Messages and other output may be displayed by a display in device  26 , and/or may be provided as audible messages and/or tactile output. 
     Following the recording of data with sensors  18  during a sleep cycle, system  8  may provide measurement results to the user. For example, sensor data conveyed from device  10  to device  26  may be displayed using graphs such as the illustrative graph of  FIG. 9 . In the illustrative graph of  FIG. 9 , time t 1  indicates the start time for use of device  10  and time t 2  indicates the stop time for use of device  10 . \arable electronic device information (e.g., curve  200  and curve  202 ) has been plotted as a function of time. In this example, value(s) V represents the magnitude of each plotted parameter during use of device  10 . These parameters may include measured biometric information such as heart rate, blood flow, eye movement amount, respiration rate, accelerometer output (indicating body movement and/or respiration rate), muscle activity, EEG information, ECG information, body temperature, etc. Additional system information (e.g., ambient noise level, audio playback state, light source output level, etc.) may also be plotted on the display of device  26  and analyzed when generating sleep measurement results for a user. Sleep measurements and associated parameters may be analyzed by device  10  and/or device  26  and the results of the analysis may be presented to the user on the display of device  26 . For example, the amount of body motion of the user may be analyzed to categorize the motion level as being low, medium, or high. If desired, raw and analyzed information may be analyzed and/or stored online (e.g., using one or more devices such as device  26  that are coupled to system  8  through a network such as the internet). 
     The foregoing is merely illustrative and various modifications can be made to the described embodiments. The foregoing embodiments may be implemented individually or in any combination.