Abstract: A cell phone case includes a housing, pod, and cover. The housing has: a first opening creating a first housing cavity to house the cell phone; and a second opening forming a second housing cavity to house the pod. The pod includes: a backing, a container, and a strip. The container has an elongated opening into a cavity that houses sanitizing wipes. A portion of the strip is sized to cover and extend beyond a periphery of the opening, and releasably adhere to the container to seal the opening to house the sanitizing wipes in a waterproof manner. A second portion of the strip is grasped to unseal and reseal the first portion. The cover attaches to the housing to hide the pod, which may be releasably retained in the housing even when the cover is removed. A spray bottle of sanitizer is stored in the second housing cavity.

Abstract: An earpiece includes a housing, a sound transmission component, a sound reception component, a force application structure and a trigger. A cavity is formed in the housing. The sound transmission component is provided in the cavity. The sound reception component is provided on the housing, and can move along a predetermined path. At least a retracted position and a stretched position are arranged on the predetermined path. The force application structure is connected to the sound reception component, and configured to drive the sound reception component to move to the retracted position or the stretched position. The earpiece in the present disclosure stretches out or retracts the sound reception component automatically. The earpiece in the present disclosure does not need the user to stretch out or retract the sound reception component manually, with good user experience.

Abstract: A mobile terminal comprises: a terminal body; and a first antenna device and a second antenna device disposed at one side of the terminal body in an adjacent manner, and formed to operate at different frequency bands, wherein the first antenna device and the second antenna device are provided with conductive members each having a slit at one side thereof, and wherein the conductive members form part of an appearance of the terminal body.

Abstract: Aspects of the subject technology relate to liquid-resistant microphone modules for electronic devices. A microphone module may include a non-porous membrane that seals the front volume of the microphone module from the external environment of the electronic device. The microphone module may also include a substrate having an opening that allows airflow between the front volume and an interior cavity within the housing of the electronic device. In various implementations, an inductive vent and/or a resistive vent may be provided over the opening in the substrate.

Abstract: An antenna apparatus includes a dielectric layer; a patch antenna pattern disposed on an upper surface of the dielectric layer and including an upper surface having a polygonal shape, a plurality of feed vias respectively disposed to penetrate the dielectric layer by at least a portion of a thickness of the dielectric layer, respectively disposed to be biased toward a first side and a second side, different from each other, from a center of the polygonal shape of the patch antenna pattern, and respectively disposed to be spaced apart from the patch antenna pattern, and a plurality of feed patterns respectively electrically connected to an upper end of a corresponding feed via, among the plurality of feed vias, respectively disposed to be spaced apart from the patch antenna pattern, and configured to provide a feed path to the patch antenna pattern, wherein the polygonal shape of the patch antenna pattern has a structure in which the first side and a third side between the first and second sides form an obtuse

Abstract: A medical device includes an antenna external to a case, package, or encapsulant for the electronic systems of the medical device. In one embodiment, a diabetes infusion pump is enclosed within a metal case, the pump including a processor and a communication module for wireless communications. An antenna is disposed in the delivery tubing of the pump outside the case with an antenna feed interconnecting the external antenna with the internal communication module. In another aspect, a thin film antenna is formed on the outer surface of the case in which a physiological parameter sensor, such as a glucose sensor, is enclosed. Multiple antennas may be used for communications on different frequencies.

Abstract: Systems, methods and apparatus for enabling access to secure data. A first module is arranged to generate a limited use passcode and make the passcode available to a user. A second module and a third module are arranged to communicate whereby to enable detection of the third module being in proximity to the second module. A fourth module is arranged to receive a passcode via user input. The apparatus is arranged to enable access to secure data in dependence on the fourth module receiving a valid passcode generated by the first module and the third module being in proximity to the second module.

Abstract: Disclosed is an electronic device. The electronic device according to an embodiment may include a first device and a second device that are coupled to each other or spaced from each other. The first device may include a first housing, a first antenna element having a first electrical length for transmitting or receiving a signal in a first frequency band, a communication circuit disposed inside the first housing and for transmitting and receiving the signal of the first antenna element, and a first ground member electrically connected to the first antenna element. The second device may include a second antenna element having a second electrical length, a second housing, and a second ground member disposed inside the second housing.

Abstract: A composite frame structure includes a metal frame and a plastic frame. The metal frame is formed by enclosing a plurality of metal sheets. The plastic frame is combined with an inner surface of the metal frame, the plastic frame has an integrally formed structure. An electronic device having the composite frame structure and a method for manufacturing the composite frame structure are provided.

Abstract: Aspects of the disclosure generally relate to computing devices and may be generally directed to devices, systems, methods, and/or applications for learning conversations among two or more conversation participants, storing this knowledge in a knowledgebase (i.e. neural network, graph, sequences, etc.), and enabling a user to simulate a conversation with an artificially intelligent conversation participant.

Abstract: The invention discloses an electronic device. The electronic device comprises a body and a function module. The function module is rotatably disposed in the body, and includes a housing, a function component and a rigid-flex circuit board. The housing includes a shaft portion. The shaft portion is engaged to the body. The function component and the rigid-flex circuit board are disposed in the housing. The rigid-flex circuit board includes a rigid board portion and at least a flexible board portion. The rigid board portion is electrically connected to the function component. The flexible board portion is connected to the rigid board portion. The flexible board portion passes through the shaft portion and extends into the body.

Abstract: The present application proposes a display device, which includes middle frame and a display panel disposed in the middle frame, wherein the display device includes a first non-display area between the middle frame and a display area of the display panel, and at least one perforated area enclosed by a first arc and a second arc; and wherein at least one first through hole is provided in the perforated area. In the present application, the perforated area is arranged in the first non-display area, which reduces the visibility of the perforated area when the display device is used, increases the screen-to-body ratio of the display device, and improves the product quality.

Abstract: A circuit board assembly is provided and includes a first circuit board, a second circuit board and a first connecting module. The first connecting module includes a first connecting wire, a first connector and a second connector. The first circuit board includes a first processor, and the second circuit board includes a second processor. One end of the first connector is connected to one end of the first connecting wire, and the other end of the first connector is connected to the first circuit board. One end of the second connector is connected to the other end of the first connecting wire, and the other end of the second connector is connected to the second circuit board. The first connector is adjacent to the first processor, and the second connector is adjacent to the second processor.

Abstract: A docking station for a handheld electronic device contains a main body, and one or more feet extending downwards from the main body and enabling the main body to be placed on the ground. Furthermore, the docking station contains a detachable back support extending upwards from the main body and enabling an electronic device to be placed into the docking station.

Abstract: When a mobile wireless terminal device and a portable wireless terminal device perform wireless communication according to a second wireless communication scheme, the portable wireless terminal device receives a touch parameter from the mobile wireless terminal device. When the touch parameter does not indicate “touched”, the mobile wireless terminal device activates wireless communication according to a first wireless communication scheme, and the portable wireless terminal device suspends wireless communication according to the first wireless communication scheme. When the touch parameter indicates “touched”, the mobile wireless terminal device activates wireless communication according to the first wireless communication scheme, and the portable wireless terminal device activates wireless communication according to the first wireless communication scheme.

Abstract: A foldable terminal includes a body, a display screen and a flattening member. The display screen is located on a surface of the body and includes a bendable portion. The flattening member is located between the body and the bendable portion, and configured to apply a force to the bendable portion, so as to flatten the bendable portion when the foldable terminal is in a flattened state.

Abstract: A method may include receiving a request to transfer a personal virtual assistant to a computing device, the personal virtual assistant including response preferences of a user; accessing a virtual assistant transfer protocol associated with the user; the virtual assistant transfer protocol including a sensitivity preference; applying the sensitivity preference to data associated with the personal virtual assistant to generate a virtual assistant transfer package; and transmitting the virtual assistant transfer package to the computing device.

Abstract: A foldable electronic device includes a frame, a flexible component disposed on the frame, and a hinge device. The hinge device includes a chain and at least one elastic padding. The chain is connected to the frame and includes a plurality of chain units. The elastic padding is disposed in at least one of the chain units or encapsulates at least one of the chain units.

Abstract: The present disclosure is drawn to bendable displays for electronic devices. In one example, a first display region including a glass panel that is rigid, the glass panel including a first interlocking edge. A second display region can include a plastic panel that is bendable, the plastic panel including a second interlocking edge that is shaped to inversely correspond with the first interlocking edge. An interlock zone where the first interlocking edge can be joined with the second interlocking edge such that the first display region and the second display region form a continuous display panel that is bendable at a location along the second display region.

Abstract: An antenna apparatus includes a dielectric layer; a patch antenna pattern disposed on an upper surface of the dielectric layer and including an upper surface having a polygonal shape, a plurality of feed vias respectively disposed to penetrate the dielectric layer by at least a portion of a thickness of the dielectric layer, respectively disposed to be biased toward a first side and a second side, different from each other, from a center of the polygonal shape of the patch antenna pattern, and respectively disposed to be spaced apart from the patch antenna pattern, and a plurality of feed patterns respectively electrically connected to an upper end of a corresponding feed via, among the plurality of feed vias, respectively disposed to be spaced apart from the patch antenna pattern, and configured to provide a feed path to the patch antenna pattern, wherein the polygonal shape of the patch antenna pattern has a structure in which the first side and a third side between the first and second sides form an obtuse

Abstract: A wearable device includes a strap, a base coupled to the strap, and a display coupled to the base. The wearable device includes a plurality of cameras embedded within the display. The display is configured to activate a specific camera of the plurality of cameras according to user interaction with the display.

Abstract: A system and method for a portable electronic device case assembly is described that allows a user to use multiple types of chargers to charge their mobile electronic device using the portable electronic device case assembly. Further, the case assembly also provides an integrated auxiliary splitter that permits a user to plug in headphones or other auxiliary cables into the top and bottom of the personal computing device.

Abstract: Systems and methods are provided for coordinated video streaming and messaging using a wrist-wearable device and a head-worn wearable device. The method includes receiving an instruction to use a camera of a head-worn wearable device to capture video data. The method further includes, after receiving the instruction to use the camera of the head-worn wearable device to capture the video data, receiving, at a wrist-wearable device that is in communication with the head-worn wearable device, electronic messages from a viewer of the video stream and monitoring sensor data indicating one or both of a position of the head-worn wearable device and (ii) a position of the wrist-wearable device to determine when to display the electronic messages. The method also includes, in accordance with a determination that the sensor data indicates that a message-viewing precondition is present, displaying the electronic messages from the viewer of the video stream.

Abstract: A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

Abstract: A thermostat that is configured to be releasably secured to a wall mountable connector, wherein the wall mountable connector includes a jumper switch that permits an installer or other professional to easily form an electrical connection between different wiring terminals of the wall mountable connector in accordance with how particular field wires are connected to the wiring terminals of the wall mountable connector. The thermostat is further configured to automatically determine the position of the jumper switch of the wall mountable connector, and in some cases, change the control of at least some functionality of the thermostat and/or HVAC equipment depending on the position of the jumper switch.

Abstract: A telepresence device comprising: a body; a camera apparatus; a first microphone; a loudspeaker; a transceiver receiving port, the transceiver receiving port operable to connect a detachable transceiver to the body; and a processor coupled to the camera apparatus, the first microphone, the loudspeaker, and the transceiver receiving port, the processor operable to communicate with an electronic communications device, wherein the transceiver receiving port is configured to couple the detachable transceiver to the processor when the detachable transceiver is connected to the body at the transceiver receiving port to enable the telepresence device to wirelessly communicate with a headset.

Abstract: An electronic device of a novel embodiment, specifically an arm-worn electronic device used while being worn on an arm, is provided. An arm-worn secondary battery used while being worn on an arm is provided. An electronic device is provided, which includes a structure body having a curved surface as a support structure body, a flexible secondary battery including a film as an exterior body over the curved surface of the support structure body, and a display portion including a plurality of display elements between a pair of films over the secondary battery. The plurality of display elements and the secondary battery overlap with each other at least partly. It is possible to provide an electronic device which has a small maximum thickness of 1 cm or less and a light weight of 50 g or less even when an arm-worn secondary battery is provided with a display portion.

Abstract: A wearable audio device can include a microphone located to detect atmospheric sound including a user's voice. The device can include an acoustic vibration sensor located to detect sound including the user's voice conducted through the user's body. The device can include a body voice filter coupled to the acoustic vibration sensor. The device can include a filter parameter generator coupled to the acoustic vibration sensor and the body voice filter the filter parameter generator configured to generate parameters for the body voice filter based on a frequency characteristic of a signal obtained from the acoustic vibration sensor. The device can include a composite signal generator coupled to the body voice filter and the microphone and configured to generate a composite voice signal based on a low band signal obtained predominately from the body voice filter and based on a high band signal obtained predominately from the microphone.

Abstract: A touch indicating cover includes a light-guide plastic piece, a printed circuit layer, an ink layer, a passivation layer, and a light-emitting component. The light-guide plastic piece has a first surface and a second surface opposite to each other, wherein the second surface of the light-guide plastic piece comprises a plurality of microstructures. The printed circuit layer is disposed on the first surface of the light-guide plastic piece. The ink layer is disposed on the printed circuit layer and the first surface of the light-guide plastic piece, wherein the ink layer comprises a light-emitting pattern region corresponding to the microstructures. The passivation film is disposed on the ink layer. The light-emitting component is embedded in the first surface of the light-guide plastic piece and connected to the printed circuit layer, wherein the light-emitting component is disposed adjacent the light-emitting pattern region.

Abstract: Disclosed herein is a method and system for utilizing a digital data capture device in conjunction with a Bluetooth (BT) enabled mobile device for publishing data and multimedia content on one or more websites automatically or with minimal user intervention. A client application is provided on the BT enabled mobile device. In the absence of inbuilt BT capability, a BT communication device is provided on the digital data capture device. The BT communication device is paired with the BT enabled mobile device to establish a connection. The client application detects capture of data and multimedia content on the digital data capture device and initiates transfer of the captured data, multimedia content, and associated files. The digital data capture device transfers the captured data, multimedia content, and the associated files to the client application. The client application automatically publishes the transferred data and multimedia content on one or more websites.

Abstract: A cupholder adapter for a large beverage container has a base, a container holder that upwardly extends from the base, and a shell insert that extends downwardly from the base. The shell insert snaps into a first shell, which may be press-fit into OEM vehicle cupholders of a relatively small size. Further shells may be sequentially and releasably attached over the first shell to fit the assembly to OEM vehicle cupholders of larger sizes. An axis of the container holder may be offset from the axis of the shell insert, so as to permit two such cupholder adapters to be installed in two cupholders closely spaced from each other in a vehicle center console.

Abstract: In an embodiment, an electronic device may include a housing including a hinge module, a first housing, and second housing. The first and second housings are rotatably coupled to each other via the hinge module to be in a folded state or an unfolded state. The electronic device may further include a flexible display, at least one conductive pattern disposed in the first housing, at least one conductor disposed at a position in the second housing corresponding to the at least one conductive pattern such that the at least one conductor is capacitively coupled to the conductive pattern when the electronic device is in the folded state, and a wireless communication circuit electrically connected to the at least one conductive pattern in the first housing. Other embodiments are also possible.

Abstract: Non-planar semiconductor devices having doped sub-fin regions and methods of fabricating non-planar semiconductor devices having doped sub-fin regions are described. For example, a method of fabricating a semiconductor structure involves forming a plurality of semiconductor fins above a semiconductor substrate. A solid state dopant source layer is formed above the semiconductor substrate, conformal with the plurality of semiconductor fins. A dielectric layer is formed above the solid state dopant source layer. The dielectric layer and the solid state dopant source layer are recessed to approximately a same level below a top surface of the plurality of semiconductor fins, exposing protruding portions of each of the plurality of semiconductor fins above sub-fin regions of each of the plurality of semiconductor fins. The method also involves driving dopants from the solid state dopant source layer into the sub-fin regions of each of the plurality of semiconductor fins.

Abstract: A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

Abstract: A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

Abstract: A bone conduction speaker includes a housing, a vibration board and a transducer. The transducer is located in the housing, and the vibration board is configured to contact with skin and pass vibration. At least one sound guiding hole is set on at least one portion of the housing to guide sound wave inside the housing to the outside of the housing. The guided sound wave interfaces with the leaked sound wave, and the interfacing reduces a sound pressure level of at least a portion of the leaked sound wave. A frequency of the at least a portion of the leaked sound wave is lower than 4000 Hz.

Abstract: A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

Abstract: A communication device is made with a metallic frame having an interior mounting surface for receiving one or more functional components. The metallic frame includes a first frame member having a first portion extending uninterrupted across one lateral side of the metallic frame. The first portion provides structural support to the communication device. A T-shaped slot antenna is formed in a second portion of the first frame member adjacent to the first portion. The T-shaped slot antenna has first and second arms separated at a gap and partially encompassing a slot. The second portion of the first frame member enables radio frequency communication by at least one of the functional components via the T-shaped slot antenna of the communication device.

Abstract: A mobile communication device is disclosed, and is modularized to include an electronic device for performing mobile communication and a frame assembly. The frame assembly comprises a circuit board having an electrical connection interface and a frame having a recess for receiving the electronic device. In addition, a first electrical connector is disposed on a side wall of the recess, and the electronic device has a second electrical connector connected to the first electrical connector, such that the electronic device coupled to the circuit board via the forgoing two electrical connectors. By inserting the mobile communication device into an accommodation space in a casing of a host electronic device, the electrical connection interface is inserted into an electrical slot that is arranged in a printed circuit board in the casing, thereby achieving a function expansion of mobile communication for the host electronic device.

Abstract: In accordance with one aspect of the disclosure, an electronic device comprises a plate at least partially forming one surface of a housing and including a first through-hole; a printed circuit board disposed in the housing under the plate, the printed circuit having a second through-hole at least partly overlapping the first through-hole when viewed from above the first surface; a microphone disposed on a surface of the printed circuit board facing away from the plate, and at least partly overlapping the second through-hole when viewed from above the first surface; a seal member that is disposed between the plate and the printed circuit board around the first through-hole or the second through-hole; a support member that includes a first portion that faces the printed circuit board and includes an opening, the opening penetrated by the microphone, and a second portion that extends from the first portion and faces the plate; a first fixture the printed circuit board and the first portion; and a second fixture

Abstract: Wireless mobile device functionality can be added to radio devices via a hardware device that comprises wireless network access. Alternatively, radio device functionality can be shared with a wireless mobile device or the hardware device. The functionalities of either device can be shared via a physical or wireless connection. For example, a microphone device comprising a display screen and long-term evolution (LTE) functionality can be connected to a radio device to facilitate LTE functionality for the radio device. Thus, a user of the radio device can utilize the display screen of the microphone device to send text data, which could not previously be sent by the radio device, over the wireless network via the microphone device.

Abstract: Methods for configuring a monitoring device to communicate with a service server are provided. The method includes the monitoring device sending a message including a code used for authentication of the monitoring device to a control server, receiving one or more addresses of a service server associated with the monitoring device from the control server in response to the monitoring device being authenticated by the control server, storing the one or more addresses retrieved by the control server, and establishing a connection between the monitoring device and the service server using at least one of the one or more addresses received from the control server.

Abstract: Provided in the present application are a pressable touch panel and an ultrasound imaging system. The pressable touch panel includes a touch assembly, an elastic member and a housing. The touch assembly includes a first surface for receiving a touch force, the elastic member is arranged below the touch assembly, and the housing is used to accommodate the elastic member, wherein the elastic member is confined by the housing to be in a compressed state to prevent liquid from passing through the elastic member.

Abstract: A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

Abstract: A combined dual-conductive key switch including a base, a cover arranged above the base, a conductive core, a mechanical-conducting component and an inductive switch which are electrically connected to a PCB respectively; and a conduction trigger block corresponding to the mechanical-conducting component and a magnet corresponding to the inductive switch are respectively arranged on the conductive core; and the conduction trigger block triggers a conduction stroke of conducting the mechanical-conducting component, which is different from a conduction stroke of conducting the inductive switch triggered by the magnet. The combined dual-conductive key switch is provided for achieving dual-conductive functions of pressing once and performing two actions for a product.

Abstract: A method may include receiving a request to transfer a personal virtual assistant to a computing device, the personal virtual assistant including response preferences of a user; accessing a virtual assistant transfer protocol associated with the user; the virtual assistant transfer protocol including a sensitivity preference; applying the sensitivity preference to data associated with the personal virtual assistant to generate a virtual assistant transfer package; and transmitting the virtual assistant transfer package to the computing device.

Abstract: The present disclosure discloses a speaker module, comprising a module housing and a speaker unit disposed in the module housing, wherein the speaker unit divides a cavity enclosed by the module housing into a front acoustic cavity and a rear acoustic cavity, the module housing is further provided with an air-permeable insulation assembly which divides the rear acoustic cavity into a first chamber and a second chamber, and the second chamber is filled with a sound-absorbing material, and wherein the air-permeable insulation assembly comprises a support frame and a mesh cloth adhered and fixed to the support frame by means of a back adhesive. The present disclosure can be used to prevent the problems of mesh breakage and mesh deviation that are likely to occur when the mesh cloth is being installed at the air-permeable insulation assembly, thereby improving the production yield of the air-permeable insulation assembly.

Abstract: An electronic device includes a multiple input, multiple output (MIMO) antenna array comprising a plurality of antenna elements configured for MIMO communication across a network. One or more sensors detect a triggering event altering a radiation correlation pattern between at least two antenna elements of the plurality of antenna elements. One or more processors then select, in response to the one or more sensors detecting the triggering event, a quantity of antenna elements from the plurality of antenna elements available for engagement in the MIMO communication across the network as a function of the radiation correlation pattern.

Abstract: An electronic device includes an enclosure formed of a plurality of layers cooperating to define an interior volume. The enclosure includes a first layer formed of a first material and defining a user input surface of the enclosure and a first portion of a side surface of the enclosure. The enclosure also includes a second layer, formed of a second material different from the first material, positioned below the first layer and defining a second portion of the side surface of the enclosure. The enclosure also includes a third layer, formed of a third material different from the first and second materials, positioned below the second layer and defining a bottom surface of the enclosure and a third portion of the side surface of the enclosure.

Abstract: A bone conduction speaker includes a housing, a vibration board and a transducer. The transducer is located in the housing, and the vibration board is configured to contact with skin and pass vibration. At least one sound guiding hole is set on at least one portion of the housing to guide sound wave inside the housing to the outside of the housing. The guided sound wave interfaces with the leaked sound wave, and the interfacing reduces a sound pressure level of at least a portion of the leaked sound wave. A frequency of the at least a portion of the leaked sound wave is lower than 4000 Hz.