Abstract: An electronic device according to an embodiment includes a housing, a rear case coupled to the housing, a sealing member arranged between the housing and the rear case, a first acoustic path extending in a single direction and including an end portion arranged between the housing and the rear case, and a first sealing member arranged between the housing and the rear case and including a first sealing area having a first sealing surfaces in contact with the housing and a second sealing surface in contact with the rear case and a second sealing area having a surface in contact with one of the housing and the rear case, wherein the second sealing area is arranged at the end portion of the first acoustic path and may include an inclined portion oriented at the end portion of the first acoustic path.

Abstract: Roof structure (1) for a vehicle, wherein the roof structure (1) comprises a roof sky (2), wherein the roof sky comprises a foam or sandwich layer (3) and a surface layer (4) covering the foam or sandwich layer preferably to a vehicle interior and wherein a microphone unit (5) is arranged at the foam or sandwich layer (3), the microphone unit (5) comprises at least one mounting means (6), the foam or sandwich layer (3) comprises at least one recess (7) to receive the at least one mounting means (6) and the mounting means (6) of the microphone unit (5) in a mounted condition of the microphone unit (5) is arranged in the at least one recess (7) thereby holding the microphone unit (5) at the foam or sandwich layer (3).

Abstract: A voice input apparatus of the present disclosure includes: a panel in which a voice input hole is formed; a circuit board which is disposed below the panel and has a voice passing hole formed in a position corresponding to the voice input hole; a first sealer having a cylindrical shape which is disposed between the panel and the circuit board, an upper end of which is in contact with a bottom surface of the panel while surrounding the voice input hole, and a lower end of which is in contact with an upper surface of the circuit board while surrounding the voice passing hole; a microphone which is disposed below the circuit board and has a sound receiving hole provided in a position corresponding to the sound passing hole; and a second sealer in which an accommodation space having an opening in an upper surface thereof is formed, and the microphone is disposed in the accommodation space, and which is in contact with a bottom surface of the circuit board in a state where the upper surface surrounds the voice pa

Abstract: Disclosed is a voice input apparatus including: a panel in which a voice input hole is formed; a circuit board which is disposed below the panel, and has a voice passing hole and a binding hole formed in a position corresponding to the voice input hole; a microphone which is disposed below the circuit board, and provided with a voice receiving hole in a position corresponding to the voice passing hole; and a sealer which guides a voice inputted through the voice input hole to the voice passing hole, wherein the sealer includes: a guide pipe which is formed in a cylindrical shape having a hollow and disposed between the panel and the circuit board, has an upper surface defining an upper end of the hollow is in contact with a bottom surface of the panel while surrounding the voice input hole, and has a lower surface defining a lower end of the hollow is in contact with an upper surface of the circuit board while surrounding the voice passing hole; and a hook which protrudes from the lower surface of the guide p

Abstract: A connectivity sled for docking and undocking a mobile computer and a payment device, comprises a first adapter plate assembly directly coupled to the payment device, including a configuration that couples to a surface of the payment device is exposes all ports, function keys, and interfaces of the payment device and at least one magnet. The sled further comprising a second adapter plate assembly directly coupled to the mobile computer, including a first portion that couples to a top surface of the mobile computer device, and at least one magnet that magnetically couples to the at least one magnet of the first adapter plate assembly.

Abstract: A smart speaker is disclosed with an interactive speaker grille. In one embodiment a smart speaker comprises a housing with a speaker grille comprising a plurality of openings. Circuitry coupled to the speaker grille is configured to sense direct user interaction with one or more of a plurality of regions of the speaker grille and to generate corresponding electrical signals indicative of the one or more regions of the speaker grille experiencing direct user interaction. The circuitry can include portions in the path of sound transmission to detect user interaction with regions of the grille and portions outside the path of sound transmission for controlling aspects of the smart speaker (e.g. speaker volume, radio station or media stream selection) based on the particular regions touched.

Abstract: A cover window includes a window member and a protective member. The window member includes a light transmitting area and a light shielding area. The protective member is disposed on a surface of the window member and includes an incision pattern. The light shielding area includes a trench portion extending concavely toward the light transmitting area. The protective member overlaps the trench portion in a thickness direction.

Abstract: Aspects of the subject technology relate to low noise microphone assemblies for electronic devices. A microphone assembly may include components for sensing sound, mounted on a substrate, under a cover disposed on the substrate. The components may receive sound through an opening in the substrate. The microphone assembly may include an interposer on the substrate. The interposer includes one or more contacts on a surface that is spatially separated from the surface of the substrate, in a direction perpendicular to the surface of the substrate. A first side of the substrate may be mounted to an inner surface of a housing of the electronic device. The components, the cover, and the interposer may be mounted to an opposing second side of the substrate. A flexible printed circuit may be coupled to the contacts on the surface of the interposer, and mechanically attached to a surface of the cover.

Abstract: The invention discloses a microphone structure with an improved substrate, comprising: a L-shaped substrate having an L-shaped normal cross section; an encapsulation shell, wherein the encapsulation shell and the L-shaped substrate form an acoustic cavity; the acoustic cavity is provided with: an acoustic transducer; an ASIC (Application Specific Integrated Circuit) chip, electrically connected to the acoustic transducer; and an acoustic through-hole disposed on the L-shaped substrate or the encapsulation shell. The present invention has the beneficial effects that, an L-shaped ceramic substrate is provided, a plurality of bonding pads are arranged on a vertical surface of the L-shaped substrate, so that electronic devices may be welded to the vertical surface of the L-shaped substrate, so that the problem of an excessive large area of the substrate being occupied by the electronic devices due to the presence of an excessive number of the electronic devices on the substrate may be avoided.

Abstract: An electronic device includes a microphone coupled to a first substrate, a second substrate defining an acoustic port, and a pressure relief device situated between the first substrate and the second substrate. The pressure relief device includes a bore defining an acoustic duct through which the microphone receives acoustic energy from the acoustic port. The pressure relief device also includes a venting section. The venting section breaches the acoustic duct when a pressure within the acoustic duct exceeds a predefined pressure threshold.

Abstract: A portable disc jockey sound system is an apparatus that houses and stores in disc jockey (DJ) equipment in a safe and organized manner. The apparatus includes a pedestal, a table, a base, a portable computing device, a power source, and a sound system. The pedestal uplifts the table from the ground so that a user may engage the sound system with the portable computing device while standing. The table supports and presents the portable computing device and a variety of DJing equipment for the user so that the user may readily access the portable computing device and DJing equipment. The base balances the platform with the ground. The portable computing device controls the sound of the music emitted with the sound system. The power source provides the necessary power for the portable computing device, the sound system, and a variety of other electronic devices connected with the apparatus.

Abstract: The present disclosure provides a method for suppressing vibration noises of a camera in an electronic device, wherein the electronic device at least comprises a housing, and an acoustic actuator and a camera accommodated in the housing, and the acoustic actuator drives the electronic device to vibrate and sound; the camera is a zoom lens and comprises a movable component and a fixed component, and the method comprises the following steps of: S1: detecting whether the acoustic actuator is in a vibrating state, performing S2 if the acoustic actuator is in a vibrating state; otherwise, ending the step; S2: generating a drive current according to a relative position relationship between the movable component and the fixed component to drive the movable component to move until abuts against the fixed component and tightly presses the movable component; and S3: repeating S1. The present disclosure greatly suppresses the vibration of the movable component, thereby suppressing the vibration noises of the camera.

Abstract: The present invention provides a speaker box, including a main body having a plurality of sound holes; and a dustproof mesh adhered to an outer side of the main body for covering the sound hole. The dustproof mesh includes an air-permeable mesh plate covering the sound holes, and a first bonding layer adhered between the air-permeable mesh plate and the main body. The first bonding layer includes a sound transmission holes corresponding to the sound holes and being covered by the air-permeable mesh plate. The speaker box further includes a second bonding layer, including an accommodation hole correspondingly accommodating the air-permeable mesh plate and the first bonding layer. The dustproof mesh has an orthographic projection at the outer side of the main body not overlapping an orthographic projection of the second bonding layer at the outer side of the main body.

Abstract: The present invention provides a speaker box, including a main body having a plurality of sound holes; and a dustproof mesh adhered to an outer side of the main body for covering the sound hole. The dustproof mesh includes an air-permeable mesh plate covering the sound holes, and a first bonding layer adhered between the air-permeable mesh plate and the main body. The first bonding layer includes a sound transmission holes corresponding to the sound holes and being covered by the air-permeable mesh plate. The speaker box further includes a second bonding layer, including an accommodation hole correspondingly accommodating the air-permeable mesh plate and the first bonding layer. The dustproof mesh has an orthographic projection at the outer side of the main body not overlapping an orthographic projection of the second bonding layer at the outer side of the main body.

Abstract: The present disclosure provides an intelligent apparatus that can include a housing, an audio module, an outer dust-proof member, and an inner dust-proof member. The housing defines a mounting chamber therein and is provided with a sound guide hole in communication with the mounting chamber. The audio module is arranged in the mounting chamber and includes a sound guide channel in communication with the sound guide hole. The outer dust-proof member is arranged between the sound guide hole and the sound guide channel, and is provided with an outer filter hole communicating the sound guide hole with the sound guide channel. The inner dust-proof member is arranged between the outer dust-proof member and the sound guide channel, and is provided with an inner filter hole communicating the outer filter hole with the sound guide channel. The outer filter hole has a larger aperture size than the inner filter hole.

Abstract: A speaker box includes a housing having a receiving space; a sound generator having a diaphragm received in the receiving space for vibrating along a vibration direction; a sound aperture formed in the housing for communicating the sound generator with an outside of the speaker box; a dustproof member positioned by the housing and covering completely the sound aperture. The dustproof member includes a first dustproof element fixed to the housing and completely covering the sound aperture; a second dustproof element fixed to the housing; a gasket plate sandwiched between the first and second dustproof elements. The gasket forms a through hole aligned with the sound aperture and completely covered by the second dustproof element.

Abstract: The present invention provides a receiver module, including: a receiver having a frame with a body part, a vibration system and a front cover overlaid on the frame. The front cover includes a sound outlet, an extension part extending from the body part, and a through hole penetrating the extension part. The receiver module further includes a denoising part, a sound absorbing hole penetrating the denoising part away from the vibration system, and a microphone set on a surface of the denoising part away from one side of the vibration system. Sound waves of the front chamber is exported to a back of sound absorbing hole away from the denoising part and noise is absorbed and eliminated by the microphone.

Abstract: A speaker assembly, includes: a housing with an accommodation space; a sound generator, and a sound aperture communicating the sound generator with an outside. A dustproof element is fixed by the housing and includes a first dustproof member, a pressing plate, and a second dustproof member attached to the pressing plate. The pressing plate includes a through hole aligned with the sound aperture, the through hole is completely covered by the second dustproof member. The housing includes at least two positioning protrusions located two sides of the sound aperture, and at least two melting posts extending along a protruding direction of the positioning protrusions. The pressing plate further includes two clip slots for engaging with the positioning protrusions. The positioning protrusion is located in the slip slot, and the pressing plate is fixed with the housing by the melted melting posts.

Abstract: Embodiments are directed to a portable electronic device having a substantially concealed barometric vent. The vent may be used to equalize air pressure within the enclosure while forming a barrier between external contaminants, moisture, and so on and various internal component and assemblies of the device. In one embodiment, the vent may include a screen configured to impede ingress of particulates and an air-permeable membrane configured to impede ingress of moisture.

Abstract: The electronic assembly may include a flexible circuit board, a sensor, and a receiver. The flexible circuit board may include a first face and a second face opposite to the first face. The sensor may be disposed on the first face of the flexible circuit board and electrically connected to the flexible circuit board. The receiver may be disposed on the second face of the flexible circuit board. A sound channel for the receiver may be communicated to outside bypassing the flexible circuit board or through the flexible circuit board.

Abstract: Audio circuitry, comprising: a speaker driver operable to drive a speaker based on a speaker signal; a current monitoring unit operable to monitor a speaker current flowing through the speaker and generate a monitor signal indicative of that current; and a microphone signal generator operable, when external sound is incident on the speaker, to generate a microphone signal representative of the external sound based on the monitor signal and the speaker signal.

Abstract: Provided are an anti-vibration structure of a speaker and an anti-vibration method for the same. A housing of the speaker has at least one annular pad mounted on a bottom portion of the housing to form at least one chamber respectively. Each of the at least one annular pad has an attachment surface. When the housing is rested on a placement surface, the attachment surface of each of the at least one annular pad is attached to the placement surface with a negative pressure effect generated by a pressure difference between the at least one chamber and air in the ambient environment, thereby ensuring an anti-slip effect and simultaneously providing an attachment force for absorbing shock generated when the speaker outputs sound.

Abstract: Embodiments are described herein in the context of housings for electronic devices. In one embodiment, a housing can make use of an outer member, which can be formed of glass. The outer member can be secured with respect to other portions of the housing for the electronic device. The output member can also be protected at its edges by a protective side member. Still further, one or more antenna can be provided at least partially internal to the protective side member. The electronic devices can be portable and in some cases handheld.

Abstract: A removable cartridge for a portable communication device. The removable cartridge includes frame having a first surface, and an opposite second surface. The second surface is non-planar and is shaped to conform to a shape of a speaker cone in the portable communications device. The removable cartridge also includes a membrane coupled to the first surface of the frame. A portion of the membrane is suspended over an open gap defined by the frame.

Abstract: The present application discloses a speaker box, including: a housing having an accommodating space; a speaker accommodated in the accommodating space for dividing the accommodating space into a front cavity and a rear cavity; a sound passageway formed in the accommodating space for communicating the front cavity with outside of the speaker box; a leakage hole penetrating the housing for communicating the rear cavity with the outside; a first air permeable film covering the leakage hole; a sound cavity formed by the front cavity and the sound passageway; an auxiliary leakage hole penetrating the sound passageway for communicating the rear cavity with the sound passageway; and a second air permeable film covering the auxiliary leakage hole.

Abstract: A speaker is disclosed. The speaker includes a housing with an accommodation space, a retaining wall enclosing an accommodation cavity for accommodating sound absorption materials with one end thereof having an opening, a sound filter covering the opening, and a support ring installed around the sound filter. The sound filter is located between the support ring and the retaining wall, or the support ring is clamped between the sound filter and the retaining wall.

Abstract: A speaker system and lamp has a base and a pedestal rotationally mounted and extending upwardly from the base. A speaker housing is rotatably mounted to the pedestal. A speaker is positioned inside the speaker housing and audibly outputs music that is received by the speaker system. A lamp assembly is fixedly mounted to a top or upper portion of the pedestal above the speaker housing. An amplifier is located in the base and connects by cabling extending through the pedestal to the speaker. A wireless receiver is located in the base or speaker housing. A floor standing speaker system and lamp includes multiple speaker components, including a subwoofer in a portion of the base and multiple speakers mounted to the pedestal. Optional removable components such as a mirror, a vinyl record display, artwork, a clock, or a directional light are available for removably mounting to the pedestal.

Abstract: This application relates to an audio assembly that includes both a speaker assembly and a microphone. By mounting both the microphone and the speaker assembly to a unitary audio bracket, space savings can be achieved over a configuration that relies on separate brackets for each component. In some embodiments, an acoustic mesh can be embedded within the audio bracket and extending across an audio channel defined by the audio bracket. The microphone can be aligned with an opening in the audio bracket by an alignment clip that is coupled with the microphone. The alignment clip helps to achieve alignment of a sensor opening of the microphone with a channel defined by the audio bracket.

Abstract: An in-vehicle microphone apparatus includes one or more microphone elements having a diaphragm and converting a vibration received by the diaphragm into an electric signal, an acoustic retainer retaining the one or more microphone elements and having an end surface provided with a plurality of sound collection ports, a bezel attached to the end surface of the acoustic retainer and having a plurality of through-holes formed at positions directly facing the plurality of the sound collection portion, and lips disposed on one of the bezel and the acoustic retainer and coming into close contact with the other at a position surrounding each of the plurality of the sound collection ports so as to fill the gap between the bezel and the acoustic retainer.

Abstract: A surface mountable microphone package comprises a first microphone and a second microphone. Furthermore, the surface mountable microphone package comprises a first opening for the first microphone and a second opening for the second microphone. The first opening and the second opening are arranged on opposite sides of the surface mountable microphone package.

Abstract: This waterproof microphone device includes a plurality of microphones, a housing, and a plurality of air-impermeable cover members. The plurality of microphones pick up sound wave and output an audio signal. The housing individually houses the plurality of microphones. The housing includes a plurality of holes. The hole guides sound wave to the microphone. The plurality of air-impermeable cover members are mounted on the housing. The air-impermeable cover member seals off the hole.

Abstract: A system is disclosed for safely and efficiently removing or returning a radio microphone from a mounting surface. The system includes a first magnet attached to the rear side of a radio microphone and a second magnet located at a desired mounting position on the mounting surface. The second magnet preferably includes an outer vinyl layer to prevent breaking or cracking of the first second magnet when returning the radio microphone to its mounting position.

Abstract: Devices, systems, and methods for a manually controlled operating system for permitting a handicapped person to brake and accelerate an automobile with hand operated controls. The system comprises a brake handle operably coupled to a foot brake pedal with a first cable and an accelerator handle operably coupled to a foot accelerator pedal with a second cable, wherein the brake handle and accelerator handle are positioned within hand reach of the handicapped person while positioned within the automobile.

Abstract: Systems and methods for retaining a microphone using a microphone boot are disclosed. The microphone boot may include a sound channeling structure for receiving and delivering sound, and a microphone retaining block for retaining a microphone and passing the sound to the microphone. The sound channeling structure may be secured to a housing of an electronic device. The sound channeling structure may include a sound tube and a hooking component that may be insertable into a tunnel and a slot, respectively, of the microphone retaining block. The sound tube may deliver the sound into the tunnel for passing to the microphone. The hooking component may lock into the slot to secure the sound channeling structure to the microphone retaining block. Thus, the microphone boot may be tightly sealed to prevent leakage of the sound, and may fix the microphone within the electronic device even in the presence of external force.

Abstract: In accordance with methods and systems of the present disclosure, a mobile device may include an enclosure adapted such that the enclosure is readily transported by a user of the mobile device, a speaker associated with the enclosure for generating sound, and a controller within the enclosure, communicatively coupled to the speaker. The controller may be configured to receive a signal from the speaker, the signal induced at least in part by sound incident on the speaker other than sound generated by the speaker and process the signal.

Abstract: A method of manufacturing a microphone assembly having an ear set function includes assembling a mike cell unit; obtaining a region for connection with the mike cell unit on a PCB, mounting only a conductive member in the region, and mounting other remaining components outside the region; adhering the mike cell unit to a corresponding region of the PCB; and sealing an adhering portion between the mike cell unit and the PCB. Assembling the mike cell unit includes inserting a mike cell case having a sound hole and a curing portion into a diaphragm assembly; stacking a spacer on the diaphragm assembly; inserting a back electrode plate into an insulating ring base; mounting the insulating ring base on the spacer; mounting a metal ring base on the insulating ring base; and curing or clamping a curing portion of the mike cell case.

Abstract: An audio processing apparatus includes first and second audio pickup units. The second audio pickup unit includes an audio resistor provided to cover a sound receiving portion to suppress external wind introduction while passing an external audio. A first filter attenuates a signal having a frequency lower than a first cutoff frequency of the output signal of a first A/D converter. A second filter attenuates a signal having a frequency higher than a second cutoff frequency of the output signal of a second A/D converter. A third filter is provided between the first audio pickup unit and the first A/D converter to attenuate a signal having a frequency lower than a third cutoff frequency for suppressing the wind noise.

Abstract: A foldable tongue piece portion formed to extend at an end of a microphone bush. An insertion hole in which a lead wire is inserted is formed near the tongue piece portion. By storing a microphone, to which the microphone bush is attached, in a container portion, the tongue piece portion is folded and the lead wire drawn through the insertion hole is pressed.

Abstract: The invention relates to a portable electronic device, comprising: a housing comprising at least one hole; and at least two directional microphones mounted in the housing and placed coincidentally for stereo sound pickup, each one of the microphones defining a main sound axis and each one of the two directional microphones defining a direct sound direction and a opposite sound direction which describe opposite directions of the main sound axis, wherein the at least one hole is a common hole shared between the at least two directional microphones such that the main sound axis of the at least two directional microphones are pointing through the common hole in different directions.

Abstract: Some embodiments herein include at least one of systems, methods, and devices for remote audio capture using a hand-held device. In some embodiments, the device captures, stores, and transmits audio to another device via wireless technologies. In some embodiments, the device may be used either as a hand-held microphone or as a lavaliere microphone.

Abstract: A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise.

Abstract: An electronic device having a microphone device is provided. The electronic device includes at least one case frame which forms the external appearance of the electronic device, at least one microphone device which is disposed in the at least one case frame, and at least one microphone hole which is formed in a position corresponding to the at least one microphone device of the at least one case frame, and is disposed in a region which is not visually exposed in the at least one case frame.

Abstract: In accordance with methods and systems of the present disclosure, a mobile device may include an enclosure adapted such that the enclosure is readily transported by a user of the mobile device, a speaker associated with the enclosure for generating sound, and a controller within the enclosure, communicatively coupled to the speaker. The controller may be configured to receive a signal from the speaker, the signal induced at least in part by sound incident on the speaker other than sound generated by the speaker and process the signal.

Abstract: Described here are devices, systems, and methods for analyte measurement. The analyte measurement devices and systems may be configured to produce a prompt that may convey information, instructions and/or encouragement to a user. In some variations, analyte measurement devices may be configured to change a prompt based on the replacement or addition of components of/to the device. In some instances, a prompt may be an auditory prompt and/or a visual prompt. In some variations, a system may comprise an analyte measurement device comprising a housing, a speaker, and a control unit. The housing may comprise a releasable housing portion comprising an identifier that is associated with a prompt. In some variations, a system may comprise an analyte measurement device and a skin that may releasably attach to the analyte measurement device and may comprise an identifier that is associated with a prompt.

Abstract: A connector with an audio receiving module provided for being electrically coupled to a main board of an electronic device includes an insulating base, an audio receiving module and a jack. The insulating base has a containing space and a containing groove, and the containing space has an opening, and the containing groove has a port. The audio receiving module is contained in the containing space and disposed at a position corresponding to the opening and includes a microphone unit and a plurality of pins, and the microphone unit is electrically coupled to each pin. The jack is contained in the containing groove and disposed at a position corresponding to the port. Therefore, the connector can provide an audio receiving effect.

Abstract: An air conditioner is provided. The air conditioner may include a body including an outlet and an audio collecting device provided on one side of the outlet, the audio collecting device including a microphone that collects audio input. The audio collecting device may include a housing body including an opening in which the microphone is installed, a housing cover provided on one side of the housing body, and a noise insulation space defined by the housing body and the housing cover. The microphone may be received in the noise insulation space.

Abstract: A mobile terminal including a case forming an external appearance, a circuit board positioned in the case, an acoustic output unit, and a connector joined to the acoustic output unit and electrically connected to the circuit board is provided. The connector contacts one lateral surface of the circuit board and is elastically deformed through the contact. The connector may include a fixed end portion inserted into the acoustic output unit and a free end portion connected to the fixed end portion to be elastically displaced.

Abstract: A compact portable stereo microphone apparatus can acquire three dimensional immersive sounds which can then be recorded and played back in a standard audio recording device. The apparatus includes two elastomer fabricated simplified human ear elements (ear models) fitted at the ends of a cylindrical cavity of a microphone enclosure. The ear models may be protected against physical damage by end grills. A circuit board, microphone cable interface, power indicator, power switch and batteries may be located in the lower shell of the enclosure. A handle may serve as the hand grip for the microphone as well as a battery cover.

Abstract: In accordance with methods and systems of the present disclosure, a mobile device may include an enclosure adapted such that the enclosure is readily transported by a user of the mobile device, a speaker associated with the enclosure for generating sound, and a controller within the enclosure, communicatively coupled to the speaker. The controller may be configured to receive a signal from the speaker, the signal induced at least in part by sound incident on the speaker other than sound generated by the speaker and process the signal.

Abstract: An audio apparatus has a housing including a tub-shaped recessed part having an upper surface and a wall surface formed on the upper surface. Microphones are circularly arranged in the vicinity of the wall surface inside the recessed part. Each microphone face toward a center direction of the recessed part and the upper surface so that a sound pick-up directivity is toward the center of the housing. A back side, opposite to the direction having the directivity of each microphone is open acoustically and is directed toward a direction higher than the wall surface of the tub-shaped recessed part.