Abstract: A video teleconferencing directional microphone has two surfaces joined with an angle of 90° relative to each other, a first omni directional microphone element arranged adjacent to the intersection between the two surfaces. The ceiling microphone assembly also includes a second omni directional microphone element arranged at a predetermined distance (d) from both surfaces. A subtractor subtracts the output of the first microphone element from the output of the second microphone element, and the output of the subtractor is equalized by an equalizer (Heq) to generate an equalized output. The surfaces and subtractor generates a quarter toroid directivity pattern for the ceiling microphone assembly. The quarter toroid sensitivity pattern increases sensitivity in the direction of a sound source of interest, but reduces sensitivity to any sound waves generated by noise sources at other locations or reverberations.

Abstract: A microphone unit comprises a vibratory diaphragm for detecting sound input through its first and second openings. The sound input through the first opening is guided to a front surface of the vibratory diaphragm while the sound input through the second opening is guided to a rear surface of the vibratory diaphragm so as to detect the sound by the vibration of the vibratory diaphragm. The microphone unit satisfies relation 0.76?D/?r?2.0 where D is difference in time between the sound propagation time from the first opening to the front surface of the vibratory diaphragm and that from the second opening to the rear surface of the vibratory diaphragm, while ?r is distance between the first and second openings. The relation D/?r?2.0 can reduce far-field noise, while the relation 0.76?D/?r can increase the detection sensitivity to sound emitted from a null point.

Abstract: There is provided a narrow directional microphone in which the acoustic resistance of an acoustic tube scarcely varies, and a larger-diameter condenser microphone unit can be used without increasing the external dimensions. In the narrow directional microphone in which a unidirectional condenser microphone unit 30 is housed in an acoustic tube 10 the front end of which is open as a front sound wave introduction port 11 and which has side sound wave introduction ports 13 in the tube peripheral surface thereof and is provided with rear sound wave introduction ports 14 on the rear end side, and a microphone casing 20 that is larger in dimension and longer than the acoustic tube 10 is arranged so as to cover the acoustic tube 10, as the acoustic tube 10, a cylindrical body formed by rounding a flexible sheet (preferably, a metal sheet) is used, and at least the side sound wave introduction ports 13 provided on the acoustic tube 10 are formed by a large number of pores formed in the sheet.

Abstract: The components of a hearing apparatus and in particular of a hearing device are to be better protected against environmental influences. A hearing apparatus is thus provided with at least one acoustic converter, e.g. receiver, in a converter housing for receiving or outputting a sound, with a sound opening in the converter housing, through which or by which a sound is received or output respectively, being sealed with an airtight membrane. A pressure equalization facility is connected to the converter housing or is integrated onto the converter housing, so that the pressures on both sides of the membrane can be equalized.

Abstract: A sound receiver includes a casing having multiple cavities which house multiple microphones and through which sound waves are received. A first sound wave is directly received by microphones. A second sound wave is reflected by an inner wall of the cavities and changes in phase corresponding to the material of the inner wall. The material of the inner wall differs for each cavity, thereby effecting a different change in phase of the second sound wave at each of the inner walls.

Abstract: Systems and methods are provided for media devices including a housing, a frame disposed adjacent to the housing, and a microphone assembly that is integrated with the frame for receiving sound.

Abstract: A voice sound input apparatus, adapted to be inputted a sound and configured to output sound data, includes: a display unit; a first microphone, related to a first sound hole; a second microphone, related to a second sound hole; a signal processing unit; and a microphone holding unit, formed with the first sound hole, and adapted to extend toward a sound source predicted position; wherein a distance between the first sound hole and the second sound hole is a distance that a phase component of a sound strength ratio is lower than or equal to 0 dB, the sound strength ratio being a ratio between a strength of a sound component contained in differential sound pressure of sounds entered to the first sound hole and the second sound hole and a strength of sound pressure of the sound entered to the first sound hole.

Abstract: To provide a microphone unit for stereophonic recording capable of adjusting an intersecting angle of sound collecting axes in accordance with conditions without impairing directivity and sound quality of the microphone. Respective rotation bases (408, 508) are rotatable about a center axis with respect to mounting bases (404, 504), respectively, which are mounted to a main body (20) of a portable sound recorder (10) through respective brackets (402, 502). Respective top ends of respective knurls (414, 514) of leading ends of the respective rotation bases (408, 508) has a shape being cut to form an inclined surface from a radial direction, and respective microphones (418, 518) are retained so that diaphragms (420, 520) are in consonance with the cut surface.

Abstract: A microphone assembly for desktop communication systems utilizes a directional microphones in a desktop conferencing system without exposing the microphone to unfavorable mechanical or acoustic influence. The microphones is built into the front portion of the base of the system, in a mechanically controlled and robust way. The microphone assembly maximizes microphone sensitivity in the direction of a near end user while simultaneously minimizing microphone sensitivity in the direction of the loudspeaker.

Abstract: An electronic device includes a first acoustic opening, a first microphone, a second acoustic opening, a second microphone, two flexible boots, and two chambers. The first microphone receives sound through the first acoustic opening. The second microphone receives the sound through the second acoustic opening. The first and second acoustic openings are spaced at least about 8 cm. The first microphone and the second microphone are identical and disposed in the flexible boots. The flexible boots are identical and disposed in the chambers. The chambers are identical.

Abstract: A voice sound input apparatus, adapted to be inputted a sound and output sound data, includes: a first microphone, related to a first sound hole; a second microphone, related to a second sound hole; a signal processing unit, configured to perform a signal processing; and a wireless transmission unit, configured to transmit the sound data based on an output signal of the signal processing unit, wherein a distance between the first sound hole and the second sound hole is a distance that a phase component of a sound strength ratio is lower than or equal to 0 dB, the sound strength ratio being a ratio between a strength of a sound component contained in differential sound pressure of sounds entered to the first sound hole and the second sound hole and a strength of sound pressure of the sound entered to the first sound hole.

Abstract: A microphone unit includes: a partition member, including a vibration film configured to be vibrated by sound; a housing, defining an inner space, and formed with a first opening and a second opening, the inner space being divided into a first space and a second space by the partition member, the first space adapted to be communicated with an outer space via the first opening, and the second space adapted to be communicated with the outer space via the second opening; and a shutter, configured to close one of the first and second openings; and an amplifier, configured to: amplify an electric signal at a first gain when the shutter closes the one of the first and second openings; and amplify the electric signal at a second gain that is larger than the first gain when first and second openings are opened.

Abstract: A triangular microphone assembly (101) for use in a vehicle accessory includes a mirror housing (106) adapted for attachment to the interior of the vehicle. A mirror is disposed in an opening of the mirror housing (106) and a plurality of virtual digital microphones (108a, 108b, 108c) are arranged in a substantially triangular configuration in the mirror housing (106). A digital signal processor (DSP) (537) is used for receiving signals from the plurality of digital microphones (108a, 108b, 108c) such that the digital microphones exhibit directional characteristics for reducing undesirable noise in at least one direction by normalizing the phase of the received signals as a function of signal frequency.

Abstract: An electronic device includes a housing, a uni-directional microphone, and a cover. The housing has a first acoustic opening and a second acoustic opening. The uni-directional microphone is disposed in the housing to receive external sound via the first acoustic opening and the second acoustic opening. The cover is disposed in the housing to cover the first acoustic opening, the second acoustic opening, and the unidirectional microphone. A process for mounting a microphone includes providing a first acoustic opening and a second acoustic opening on a housing, fixing a uni-directional microphone in the housing beside the first acoustic opening, and covering the first acoustic opening, the second acoustic opening, and the uni-directional microphone with a cover.

Abstract: A microphone contains a capacitor in a capsule with a diaphragm serving as one of electrodes of the capacitor. The microphone is mounted on a mounting board when external terminals installed on an external surface of a circuit board which closes an opening of the capsule are connected face to face with connection terminals on the mounting board. A sound hole is formed in the circuit board and through-hole is formed in the mounting board, being placed in such a position as to avoid overlapping each other when the microphone is mounted. An enclosed space which communicates the through-hole and sound hole is formed when the external terminals are connected with the connection terminals on the mounting board.

Abstract: Provided are a method and apparatus for controlling a sound field through an array speaker. The method includes calculating a coefficient of a filter that controls sound pressure of an input signal, based on a sound pressure ratio of a suppression area that suppresses sound emitted from an array speaker and an emphasis area that emphasizes the sound, and sound pressure efficiency in the emphasis area, generating a plurality of output signals that focuses the sound to the emphasis area by filtering the input signal based on the calculated coefficient of the filter, and outputting a sound field controlled sound based on the generated plurality of output signals. Accordingly, a listener in a predetermined direction and distance from the array speaker can clearly hear sound, without wearing an earphone or a headset so as to focus the sound only to the listener.

Abstract: A boundary microphone, comprising: a base made of a metal; a cover made of a metal having a plurality of holes for introducing sound waves; and internal components including a microphone unit that is disposed in an internal space enclosed by the base and the cover; a first metallic part disposed on one side of the upper and lower sides of the internal components; and a second metallic part, which is disposed on other side of the upper and lower sides of the internal components and which encloses the internal components along with the first metallic part from all directions, are provided, wherein the base, the cover, the first metallic part, and the second metallic part are alternately overlapped at their peripheral portions, and wherein at least one of the first metallic part and the second metallic part is made of a metallic mesh.

Abstract: A microphone system may include a housing having a housing opening. Pressure-gradient capsules may be provided in the housing. The capsules may include a diaphragm and at least one sound entry opening. One sound entry opening may be connected with a front side of the diaphragm in an acoustically conductive manner and another sound entry opening may be connected with a rear side of the diaphragm in an acoustically conductive manner. The sound entry openings may be located in each of the pressure-gradient capsule on an entry surface. The diaphragms of the pressure-gradient capsules may be oriented substantially parallel to each other. The sound entry opening may be directed into a space, which may be closed in a direction perpendicular to the entry surface. The space may be connected to the housing opening in an acoustically conductive manner. The microphone system may be compact and robust, and it may be suitable for use with hands-free devices.

Abstract: There is provided a dynamic microphone in which the output impedance does not increase and also the failure rate does not increase though using a microphone unit and a vibration detecting unit to reduce handling noise. In the dynamic microphone including a microphone unit 20 that includes a first diaphragm 24 and a first magnetic circuit 26 and delivers sound signals and a vibration detecting unit 30 that includes a second diaphragm 32 and a second magnetic circuit 33 and detects vibrations applied to a microphone case, whereby the output signal of the vibration detecting unit 30 being delivered as an opposite phase with respect to the output signal of the microphone unit 20, a field coil 41 excited by the output signal of the vibration detecting unit 30 is provided on the first magnetic circuit 26 side of the microphone unit 20.

Abstract: A microphone boom cap includes a porous plastic portion adapted to cover a microphone boom first aperture. The microphone boom cap includes a non-porous plastic portion affixed to the porous plastic portion. The non-porous plastic portion is adapted to cover a microphone boom second aperture in a second use position, where the porous plastic portion covers the second aperture in a first use position.

Abstract: A device includes a main body, a microphone module, and an acoustic guard. The microphone module is connected to the main body and comprises a first acoustic opening and a second acoustic opening, wherein the microphone module receives sound waves via both the first and second acoustic openings. The acoustic guard covers the second acoustic opening and comprises a first sound inlet via which the sound waves enter the acoustic guard and reach the second acoustic opening.

Abstract: An improved microphone assembly (128) is provided for porting two microphones (240, 242) of an opposing pair used for beam forming through a single symmetric porting structure (244). The microphone assembly (128) includes a first microphone capsule (240), a second microphone capsule (242) and a porting structure (244). The porting structure (244) encloses the first and second microphone capsules (240, 242) therein and has a first port (251) formed in a first wall (246) thereof and a second port (252) formed in a second wall (248) thereof opposite to the first wall (246), where the first and second microphone capsules (240, 242) share the first port (251).

Abstract: A microphone apparatus includes a mounting substrate, and at least two MEMS microphone elements mounted on the mounting substrate. The mounting substrate is provided with respective sound holes located directly under the MEMS microphone elements.

Abstract: A multi-microphone capsule includes a housing, a plurality of microphones disposed in the housing, and an acoustic seal also disposed in the housing, wherein the microphones include an omni-directional microphone, a uni-directional microphone, or combinations thereof. The microphones are placed front-and-back or side-by-side, or a part of the microphones are placed side-by-side and the other microphones are placed front-and-back with the part of the microphones.

Abstract: There is provided a narrow directional microphone which houses a plurality of microphone units of a first-order pressure gradient type (condenser microphone) while achieving reduced weight and compact shape at the same time. The narrow directional microphone includes a cylindrical microphone case that is also used as an acoustic tube and two or more microphone units housed in the microphone case, each having a front acoustic terminal and a rear acoustic terminal. A hole communicating with the inside and outside of the microphone case is provided in the peripheral wall of the microphone case, and an acoustic resistance material is provided on the inside of the microphone case so as to close the hole.

Abstract: A base having a flat shape; a support provided on a bottom surface of the base; a microphone unit incorporated in the base and converts sound into an electric signal; and a pressure sensitive switch with which an output signal from the microphone unit is turned on and off are included. At least one such pressure sensitive switch is provided to be pressed between the base and the support.

Abstract: An implanted microphone is provided that has reduced sensitivity to vibration and attendant acceleration forces to differentiate between desirable and undesirable components of a transcutaneously received signal. More specifically, the microphone utilizes an output that is indicative of acceleration forces acting on the implanted microphone to counteract and/or cancel the effects of acceleration-induced pressures in an output signal of a microphone diaphragm. In one arrangement, a microphone having two diaphragms pneumatically cancels acceleration pressures. In this arrangement, a first diaphragm receives and generates a response to commingled acoustic and acceleration forces and a second diaphragm is substantially isolated from the acoustic forces. That is, the second diaphragm generates a response to acceleration forces. The displacements of the first and second diaphragms are pneumatically combined.

Abstract: A modular wireless headset includes wearable earpiece(s) and wearable microphone(s), where the earpiece and microphone may be physically separate devices. The wearable earpiece renders inbound radio frequencies received from a host device audible. The wearable earpiece may include a receiver module, data recovery module, and speaker module. The receiver module may convert inbound RF signals into low intermediate frequency (IF) signals. The data recovery module recovers audio signals from the low IF signals. The speaker module renders the audio signals audible. The wearable microphone converts received audio signals into outbound RF signals, where the outbound RF signals are transmitted to the host device. The wearable microphone includes an audio input module and a transmitter module. The audio input module is operably coupled to convert received analog audio signals into digital audio signals. The transmitter module is operably coupled to convert the digital audio signals into the outbound RF signals.

Abstract: A method of improving the “tight space” usefulness of a unidirectional microphone of the type having an otherwise screw-together headpiece and handle, includes the steps of: (a) fabricating an adapter having male- and female-threaded ends and a cavity of a specified volume that extends between these ends, and where each of these ends has a centerline and these intersect at a prescribed angle, (b) fabricating the adapter's cavity so that its volume is approximately equivalent to that of the volume of handle's acoustic chamber, and (c) connecting the adapter's male-threaded end to the handle and its female-threaded end to the headpiece in such a manner as to not appreciably change the frequency response characteristics of the microphone.

Abstract: Provided is a method for canceling background noise of a sound source other than a target direction sound source in order to realize highly accurate speech recognition, and a system using the same. In terms of directional characteristics of a microphone array, due to a capability of approximating a power distribution of each angle of each of possible various sound source directions by use of a sum of coefficient multiples of a base form angle power distribution of a target sound source measured beforehand by base form angle by using a base form sound, and power distribution of a non-directional background sound by base form, only a component of the target sound source direction is extracted at a noise suppression part. In addition, when the target sound source direction is unknown, at a sound source localization part, a distribution for minimizing the approximate residual is selected from base form angle power distributions of various sound source directions to assume a target sound source direction.

Abstract: An electronic device includes a housing, a plurality of microphones, and a plurality of guide tubes. The plurality of microphones are disposed in the housing. The plurality of guide tubes extend from the housing toward the plurality of microphones, whereby the plurality of microphones in the housing receives external sound via the guide tubes.

Abstract: A differential microphone assembly with multiple membranes in a single package and oriented in mutually exclusive directions.

Abstract: An electronic device includes a housing, a plurality of microphones, and a plurality of guide tubes. The plurality of microphones are disposed in the housing. The plurality of guide tubes extend from the housing toward the plurality of microphones, whereby the plurality of microphones in the housing are capable of receiving external sound via the guide tubes.

Abstract: A microphone includes a housing including a structure and a motor assembly. The housing includes an inner space and the motor assembly mounted in the housing divides the inner space into a front volume and a back volume. The structure formed as part of the housing includes a plurality of openings, e.g. notches in different dimensions. The openings may act as a time delay structure to modify the directivity characteristics of the microphone.

Abstract: An electronic device includes a body and a microphone module. The body includes a plurality of corners and a plurality of edges meeting at the corners. The microphone module is provided with a plurality of acoustic openings and disposed at the corners and/or the edges of the body to expose the acoustic openings.

Abstract: A microphone assembly for desktop communication systems utilizes a directional microphones in a desktop conferencing system without exposing the microphone to unfavorable mechanical or acoustic influence. The microphones is built into the front portion of the base of the system, in a mechanically controlled and robust way. The microphone assembly maximizes microphone sensitivity in the direction of a near end user while simultaneously minimizing microphone sensitivity in the direction of the loudspeaker.

Abstract: A directional silicon condenser microphone having an additional back chamber is disclosed. The directional silicon condenser microphone comprises a case having a front sound hole for passing through a front sound; a acoustic delay device for delaying a phase of a sound; a substrate including a chamber case, a MEMS chip having an additional back chamber formed by the chamber case, an ASIC chip for operating the MEMS chip, a conductive pattern for bonding the substrate to the case, and a rear sound hole for passing through a rear sound; a fixing means for fixing the case to the substrate; and an adhesive for bonding the case and the substrate, wherein the adhesive is applied to an entirety of a bonding surface of the case and the substrate fixed by the fixing means.

Abstract: A differential microphone having a perimeter slit formed around the microphone diaphragm that replaces the backside hole previously required in conventional silicon, micromachined microphones. The differential microphone is formed using silicon fabrication techniques applied only to a single, front face of a silicon wafer. The backside holes of prior art microphones typically require that a secondary machining operation be performed on the rear surface of the silicon wafer during fabrication. This secondary operation adds complexity and cost to the micromachined microphones so fabricated. Comb fingers forming a portion of a capacitive arrangement may be fabricated as part of the differential microphone diaphragm.

Abstract: An electronic device includes a case and a microphone array. The case includes a front surface, a rear surface, and side edges connecting the front surface and the rear surface. The microphone array includes a first microphone module and a second microphone module disposed in the case and arranged in a row not parallel to the side edges of the case.

Abstract: An acoustic vibration sensor, also referred to as a speech sensing device, is provided. The acoustic vibration sensor receives speech signals of a human talker and, in response, generates electrical signals representative of human speech. The acoustic vibration sensor includes at least one diaphragm positioned adjacent to a front port and at least one coupler. The coupler couples a first set of signals to the diaphragm while isolating the diaphragm from the second set of signals. The coupler includes at least one material with acoustic impedance matched to the acoustic impedance of human skin.

Abstract: A device includes a main body, a microphone module, and an acoustic guard. The microphone module is connected to the main body and comprises a first acoustic opening and a second acoustic opening, wherein the microphone module receives sound waves via both the first and second acoustic openings. The acoustic guard covers the second acoustic opening and comprises a first sound inlet via which the sound waves enter the acoustic guard and reach the second acoustic opening.

Abstract: An electronic device includes a housing, a uni-directional microphone, and a cover. The housing has a first acoustic opening and a second acoustic opening. The uni-directional microphone is disposed in the housing to receive external sound via the first acoustic opening and the second acoustic opening. The cover is disposed in the housing to cover the first acoustic opening, the second acoustic opening, and the unidirectional microphone. A process for mounting a microphone includes providing a first acoustic opening and a second acoustic opening on a housing, fixing a uni-directional microphone in the housing beside the first acoustic opening, and covering the first acoustic opening, the second acoustic opening, and the uni-directional microphone with a cover.

Abstract: A device comprises a microphone housing and a uni-directional microphone. The microphone housing includes a first acoustic passage and a second acoustic passage. The unidirectional microphone is disposed in the microphone housing, comprising a first surface receiving external sound via the first acoustic passage, and a second surface receiving the external sound via the second acoustic passage, wherein the first acoustic passage runs parallel to the first surface of the unidirectional microphone.

Abstract: An apparatus and method for discriminating a directional component of a propagating pressure wave using an array of operatively-coupled displacement sensors are disclosed. In accordance with the illustrative embodiment, each displacement sensor in the array comprises two parallel layers, at least one of which is movable. The output signal of each displacement sensor is based on the separation of the layers. The displacement sensors are operatively-coupled through a compressible fluid such that the response of one of the sensors to an input can cause an output signal in at least one of the other sensors. The operative-coupling of the displacement sensors amplifies relative phase information between their respective output signals, which results in improved directionality. Some embodiments of the present invention are particularly well-suited for use in microphones.

Abstract: An electronic device includes a housing, a plurality of microphones, and a plurality of guide tubes. The plurality of microphones are disposed in the housing. The plurality of guide tubes extend from the housing toward the plurality of microphones, whereby the plurality of microphones in the housing are capable of receiving external sound via the guide tubes.

Abstract: A loudspeaker includes a frame, a magnet coupled to the frame and a diaphragm secured to the frame. An acoustic lens may be positioned in front of the diaphragm. An aperture extends through the acoustic lens. The acoustical directivity pattern of the loudspeaker may be modified by the acoustic lens to improve the uniformity of the off axis vs. on axis sound pressure level.

Abstract: Eyewear comprises a microphone and a speaker. An eyewear neck strap couples the microphone and speaker to a wearer unit carried by the eyewear wearer. The wearer unit exchanges wireless signals with a base station. The base station is coupled to various devices such as surgical theater equipment, and/or to a telecommunication system, such as a telephone system. The eyewear enables the wearer to conduct hands-free communication such as telephone conversations and command and control operations, as well as to perform other hands-free tasks such as dictation. The wearer also receives data in audio form or as an image using a video display coupled with the eyewear.

Abstract: A microphone housing improves the broadband noise canceling performance of an active noise canceling microphone system while also ensuring improved speech transmission through the system. First and second microphone elements are selected each having a diameter “d” and a thickness “t”. The two microphone elements are aligned axially with the back surfaces in contact and secured in an axially aligned cylindrical cavity within a cylindrically shaped housing. The cylindrically shaped housing has an outside diameter “D,” an interior cavity of diameter of “d,” and a height “2t”. The housing is exposed to an environment comprising both speech and noise. The first microphone element is adapted to receive a signal having both voice and noise components, while the second microphone element is adapted to receive a signal that is predominantly noise. A controller processes signals from the first microphone element and the second microphone element.

Abstract: A microphone assembly fitted to a panel of a vehicle-mounted control module, provided with a housing for housing a microphone and having an opening section on a surface facing the panel, and a holding case for holding the housing so as to be capable of pivoting, and when inserted into a receptacle provided in the panel the housing pivots so as to seal the opening section to the panel.

Abstract: Headsets are used in variety of applications to facilitate one- or two-way audio communications between users and/or devices. The present inventor recognized that conventional headsets lack means for successfully integrating more than one audio source, despite their use in proximity to multiple sources of audio signals, such as cell phones, laptops, aircraft radios, and so forth. Accordingly, the present inventors devised one or more devices, circuits, and methods related to connection of at least two audio input signals to a headset. For example, in one embodiment, an active-noise-reduction (ANR) headset includes at least one auxiliary port for connection to an output of at least one device, such as a personal communications, computing, and/or entertainment device. This exemplary headset also includes a primary port for connection to a two-radio or public-address system and circuitry for automatically suppressing or muting the volume of an auxiliary input signal relative to that of a primary input signal.