Abstract: Microphone placement for oral applications are disclosed herein. The assembly may be attached, adhered, or otherwise embedded into or upon a removable oral appliance to form a hearing aid assembly. Such an oral appliance may be a custom-made device which can enhance and/or optimize received audio signals for vibrational conduction to the user. Received audio signals may be processed to cancel acoustic echo such that undesired sounds received by one or more intra-buccal and/or extra-buccal microphones are eliminated or mitigated. Multiple microphones may be positioned throughout the user's mouth to enhance reception of audio signals from outside sources as well as from the user's own voice. For instance, one or more microphones may be placed in contact with the inner surface of the user's cheeks to detect outside audio signals as well as in direct contact with the user's tooth or teeth to receive the user's voice through vibrational detection.

Abstract: An ear cup with a bone conduction function comprising a cup (1), a sealing ring (3) and a microphone capsule (5). The cup (1) has an edge (2) on which the sealing ring (3) is disposed. The microphone capsule (5) is disposed in a retainer body (4). The retainer body (4) has an anchorage portion (6) with which the retainer body (4) and its anchorage portion (6) are secured interiorly in the cup. The retainer body (4) has a substantially planar surface for abutment and sealing against the wearer's head in the position of use. In the position of use, the retainer body (4) is located between the sealing ring (3) and the wearer's head, and the retainer body (4) is wholly or partly pressed into the sealing ring (3).

Abstract: A bone conduction device, comprising: a sound input element configured to receive an acoustic sound signal; an electronics module configured generate an electrical signal representing said acoustic sound signal; and a transducer, comprising a mass configured to move in a rotational direction, configured to generate a vibrational force in a tangential direction with respect to a recipient's bone.

Abstract: A voice activity detection apparatus having a capacitive sensor and a voice activity detector sensor. The voice activity detector sensor detects vibration of human tissue associated with user speech. Utilization of the voice activity detector sensor output is tied to the output of the capacitive sensor, where the capacitive sensor detects whether it is in contact with user skin.

Abstract: A device and method for transmitting sound waves between a signal source and a user's ears, wherein the sound waves bypass the air. The sound waves are conducted by the user's teeth and bones to the user's ears, where they are perceived as sound. Sound-transmitting toothbrushes and the like are described to transmit and/or conduct sound to the user's ear, while the user is brushing his or her teeth. The toothbrush head and a signal source are configured to produce sound waves for transmission through the toothbrush head to the user's mouth, and a tension controller is configured to control the volume of the sound waves based on the pressure applied by the toothbrush head. The signal source may produce sound waves directly or with the assistance of a transducer. The signal source may be replaceable, connect to a replaceable cartridge, or connect to an adaptor capable of downloading data to allow the signal source data to be replaceable.

Abstract: An intra-oral hearing appliance includes an actuator to provide bone conduction sound transmission; a transceiver coupled to the actuator to cause the actuator to generate sound; and a first chamber containing the actuator and the transceiver, said first chamber adapted to be coupled to one or more teeth without contacting the occlusal surfaces of the one or more teeth.

Abstract: An audio headset with bio-signal sensors is provided. In some embodiments, an audio headset that includes one or more electroencephalography (EEG) sensors is provided.

Abstract: An apparatus (300) and method (500) for receiving inputs from a user (102) is provided. The inputs from the user may be head gestures and/or speech of the user. The head gestures refer to movements of the head of the user. The apparatus includes an accelerometer (303) for receiving inputs from the user. The inputs are in form of nasal bone vibrations of the user, which are caused by the head gestures and/or speech of the user. The accelerometer further generates signals corresponding to the inputs received from the user.

Abstract: The object is to provide a bone-conduction handset, which has its main body (1) sufficiently isolated from a bone-conduction speaker unit (3) so that: the chances that howling and sound leaking may occur are reduced; and, the handset is improved in easiness in use. In the handset, the speaker unit (3) is mounted on the main body (1) through a speaker mounting member (2) made of a vibration-proof material. The mounting member (2) is characterized by comprising a connection portion (6), which is disposed perpendicularly to both the handset body (1) and the speaker unit (3) in a manner such that the main body (1) and the speaker unit (3) have their opposed inner surfaces disposed adjacent to opposite sides of the connection portion (6), whereby the main body (1) is isolated from the speaker unit (3).

Abstract: This invention is about bone conduction headset, method of bone conduction method and eardrum, it has hearing-aid function, provide bone conduction headset which is folded compactly using first and second extension part, first and second hinge part and hinge axis, also provide bone conduction headset which is received and output the signal not only wired but also wireless method.

Abstract: This invention relates to a wearable tactile subwoofer. The invention also relates to a wearable device for listening to music and for enhancing other audio and audio including experiences and a method of listening to music and enhancing other audio and audio accompanied experiences in humans.

Abstract: The nasal bone conduction wireless communication transmitting device of the present invention comprises a bone conduction inputting device; a wireless communication transmitting device electrically connected to the bone conduction inputting device; a bone conduction outputting device having a second oscillator; and a carrier device for supporting those abovementioned devices. The invention is characterized by that the carrier device is a carrier provided on the nose for making the bone conduction outputting device and the bone conduction inputting device supported by it closely touching the skin of the nasal bone, and making the oscillating wave of the bone conduction outputting device being sent to the ear via the nasal bone conduction after the resonance in the nasal cavity; and converting the sound provided through the nasal conduction resonance by the bone conduction inputting device into an electrical wave, and then transmitting it to the wireless communication transmitting device for signaling.

Abstract: A compact fetal sound system delivers high-fidelity sound to a fetus in utero through a miniature, abdominally mounted driver with a convex diaphragm. No gel is necessary at the interface between the diaphragm and the mother's abdomen. Digital signal processing shapes the frequency spectrum of the sound transmitted to the fetus, so that after traveling through the attenuative tissue of the expectant mother the desired volume of sound and frequency content reach the ears of the fetus. As the term of pregnancy progresses, the frequency shaping provided by the digital signal processing automatically varies to compensate for changes in uterine lining thickness and the like. Preferred embodiments also include a microphone attached to the abdomen of the mother and signal processing to correct for frequency and amplitude distortions of sound eminating from the womb. Embodiments also include an elastic belt to maintain the transducer and microphone against the abdomen.

Abstract: It is intended to provide a handset that can communicate clear conversations and that is superior in serviceability, even in work environments where wearing a helmet is required or in conditions where wearing a helmet or mask is required, such as when riding a two-wheel vehicle, performing construction work, or the like, and that includes a bone conduction speaker and a laryngophone that are detachable. The handset includes a bone conduction speaker 1 that uses a ceramic piezo element for transmitting a voice by utilizing a bone conduction sound, a laryngophone 2 that uses a ceramic piezo element for picking up voice vibrations around a throat, and connecting equipment 10n that detachably connects said bone conduction speaker and said laryngophone that processes signals, and that is provided with a transmission line that transmits signals sent and received for calls.

Abstract: A wearable communication device includes a bone conduction actuator which is applicable for being in contact with a user's wrist, hand, back of the hand, finger or nail in order to transmit voice signals. The user inserts the user's finger into the user's ear canal, or touches the user's finger to a part near the user's ear, or puts the user's fingertip or nail on the user's ear canal so as to block the user's ear canal when the user uses the wearable communication device.

Abstract: A stereo headphone includes a first audio element and a second audio element to be positioned against sides of a user's head in which each of the first and second audio elements is configured to transmit audio signals through bone to the auditory system of the user.

Abstract: Systems and methods for transmitting an audio signal through a bone of a user includes receiving an audio signal from a first, microphone positioned, at an entrance or in a first ear canal; and vibrating a first transducer to audibly transmit the audio signal through the bone. A second microphone can be positioned in a second ear canal and the two microphones preserve and deliver inter-aural sound level and phase differences that naturally occur so that the user can perceive directionality.

Abstract: Systems and methods are disclosed for enhancing the performance of hearing aids and the like. For example, an extension for a hearing aid can include a stem having one or more flanges formed thereon. The flanges can be configured to enhance the fit of the hearing aid in the ear canal. The extension can cushion sensitive tissues of the ear canal from contact with the hard plastic inner end of the hearing aid. The extension also inhibits undesirable leakage of sound around the hearing aid. Thus, both comfort and effectiveness of a hearing aid or the like are enhanced.

Abstract: Headwear adapted to transmit personal auditory sound waves via bone conduction and methods pertaining thereto are described. A bone conduction apparatus includes one or more bone conduction oscillators detachably affixed to an article of headwear and adapted to receive electrical signals and transmit auditory sound waves via bone conduction. The oscillators are attached to the headwear such that they remain in substantially constant and consistent contact with the head when the article is worn by a user. Further, the bone conduction oscillators may be waterproof, substantially flat, and malleable such that the article can be worn comfortably during a range of physical activities and in a range of adverse environmental conditions while maintaining such contact. Likewise, the bone conduction apparatus as a whole can be comfortably worn in concert with other headwear including a complementary air conduction device (e.g. headphones).

Abstract: A sound transducer for the transmission of audio frequency signals with a pressure-voltage transducer is provided. This pressure-voltage transducer is disposed on a supporting plate and at least partially embedded in a sound-insulating, substantially incompressible material, for example a gel. The supporting plate rests herein in contact on a body part, for example a jaw or skull bone, of a person. If this person conducts a conversation, the vibrations of the bone generated through the conversation are transmitted to a supporting plate. This supporting plate subsequently transmits the vibrations onto the pressure-voltage transducer, for example a piezoelectric element or an electret element.

Abstract: A two-way communication system particularly valuable for noisy environments where a user has a tooth bone conduction microphone in his mouth normally controlled by a tongue switch that transmits an electrical signal representing speech to a retransmit module usually worn on the user's body or mounted on an earphone or headset where the speech electrical signal is retransmitted to a second user usually by RF. The retransmit module can also receive signals from the second user and transmit them to the earphone or headset thus providing two-way communication.

Abstract: A Bluetooth earphone having a semi-automatic receiving function includes a housing, an earphone, a first flexible portion, a button, and a fastening mechanism. The housing has a receiving slot. The earphone is pivoted with the housing and received in the receiving slot that can be rotated to the outside of the housing. The first flexible portion located between the housing and the earphone provides a force to eject the earphone. The button is located on the housing and connected with the earphone. The fastening mechanism is located between the button and the housing to fasten the earphone in the receiving slot. The user presses the button to eject the earphone by utilizing the flexible force of the first flexible portion. Thereby, the earphone can be received in the housing to prevent the earphone from being broken due to the impacts of external forces.

Abstract: In a bone conduction speaker, a body has a shape of a cylinder, and a vibrating plate is inserted to a mastoid to close an upper opening portion of the body. An auxiliary vibrating plate is inserted to the mastoid under the vibrating plate. A vibrating coil is attached on a lower side of the auxiliary vibrating plate. A speaker plate is fixed at an inner central portion of the body, and a ring type magnet is fixed on the speaker plate. An edge portion of a yoke is fixed on the ring type magnet and a central portion of the yoke has a protrusion which protrudes in the inside direction of a central hole of the speaker plate. An acoustic vibrating plate is fixed at a lower portion of the body, and an acoustic coil is fixed on the acoustic vibrating plate.

Abstract: The object is to provide a bone-conduction speaker and its manufacturing method, wherein: efficiency in production is excellent due to reduction in man-hours needed to produce the speaker's parts; any cumbersome removal operation of grinding dust is eliminated; and, variations in product's lowest resonance frequency derived from variations in diaphragm's thickness are minimized, which contributes to improvement in stability of the product's quality and in reliability of the product. The speaker comprises: a yoke (1) having a center magnetic pole and a voice coil wrapped around the pole; magnets (2) disposed on opposite extensions of the yoke (1); diaphragm fixing portions (3) disposed on the other opposite extensions of the yoke (1); the diaphragm (4) fixed to the fixing portions (3); and a plate yoke (6) fixed to the diaphragm (4) to which the yoke (6) has its outer peripheral edges adjacent to the fixing portions (3) laser-welded.

Abstract: An ear speaker device includes an electroacoustic transducer including a housing mounted at a predetermined position of listener's head, a speaker unit mounted on one surface in the housing, and positioned away from an entrance of the listener's external acoustic meatus for a predetermined distance when the housing is mounted on the listener's head, and a tubular duct extended so as to allow a sound generated by the housing in the inner space thereof to reach the vicinity of the entrance of the listener's external acoustic meatus, and a hole for emitting sound of the duct is oriented to the opposite direction with respect to the entrance of the external acoustic meatus; and a mounting part used for mounting the electroacoustic transducer on the listener's head in a manner that the predetermined distance is provided between the speaker unit and the entrance of the listener's external acoustic meatus.

Abstract: The specification and drawings present a new method, apparatus and software product for providing flexible audio communication solutions using ear-devices utilizing, e.g., electrode transducers with one or more sensors comprising a surface resonator cavity sensitive to a predetermined acoustic frequency range for using, for example, in headsets and hearing aids. The ear-device can be configured for inserting it into a human ear for a handsfree operation and the sensors can be configured to detect human tissue vibrations using the surface resonator cavity. The acoustic communication solutions with these ear-devices may include: providing two-way communications in normal conditions as well as in noisy conditions, providing protection of hearing, recording the true sound field bin-aurally, providing a playback capability, providing volume enhancement and equalization for persons with hearing defects, etc.

Abstract: The invention relates to a method, to a device and to uses thereof for the sensitive detection of audio events in order to obtain sensations and feelings of the living skin. The audio event is broken down in to several spectral ranges, and from the signals which represent said range, control voltages are determined for a defined selection of predetermined transmitters which act upon and/or in the living skin. The selection and allocation of the control voltages is dependant on a signal analysis which uses signals which represent the spectral range. The invention relates both to the rendering of deaf people sensitive to music and to the transmission of signals to deaf people.

Abstract: A multifunction speaker comprises a frame made of an insulation material and having a terminal supporting portion, a pair of supporting springs are partly embedded in the frame. A magnetic circuit is resiliently supported in the frame by the springs, a diaphragm is secured to the frame, a coil is secured to the diaphragm, an upper metal protector and a lower metal protector are set on the frame. The upper and lower protectors are secured to each other so as to shield the frame except the terminal supporting portion of the frame, a pair of terminals are provided on the terminal supporting portion, each of the terminals is connected to an end of the coil, and a ground terminal is provided on the terminal supporting portion and is connected to either of the upper and lower protectors.

Abstract: The vibrator system is for generating bone conduction vibrations. A magnet (8a) provides a static magnetic flux (?1) that follows a first path. A bobbin (4a) is disposed at a center a vibrator (2). A housing (10) encloses the bobbin and has a coil surrounding a center of the bobbin. The coil is powered by an alternating current for providing an alternating dynamic magnetic flux (?2) following the first path through a magnetic circuit. The housing has an upper end (116). The upper end and the bobbin have a first gap (14a) formed therebetween. The housing has a lower end (118) opposite the upper end. The lower end and the bobbin have a second gap (14b) formed therebetween. The magnet is positioned so that the static magnetic flux (?1) is passing through the first and second gaps in a direction substantially parallel with an axial direction (A) of the vibrator. Suspension means (16a, 16b) are provided for suspending the bobbin in a center of the housing.

Abstract: A hearing device (FIG. 1, FIG. 2, FIG. 3) that simultaneously generates both air and bone conduction sounds. The vibrator (6) placed on mastoid bone can effectively produce enhanced bass sound effects. This hearing device can be used for an hearing impaired person.

Abstract: A contact type electret condenser pickup to deliver high anti noise, top talking quality, and comprehensive range of applications includes a casing provided with an accommodation chamber to contain an O-ring, a vibration part, an insulation packing, a back plate retaining ring containing a back plate, a conductive connection ring, and a circuit board horizontally placed in sequence; vibration of a sound of a user is transmitted to the vibration part; then an inertia vibration of the metal sheet changes capacitance between the vibration part and the back plate; the changed vibration is converted through the circuit board set into voltage of alternating signals for output variable according to changes of vibration.

Abstract: A card-type sound apparatus has, on a card-shaped substrate, a combination of a sound signal input portion to which a sound signal is input from outside and a sound generation portion that generates sound according to the sound signal input to the sound signal input portion, or a combination of a sound collection portion that collects sound from outside and converts the sound into an electric signal and a sound signal output portion that outputs to outside the electric signal obtained from the sound collection portion, or both of these combinations. The sound generation portion generates sound by making the card-shaped substrate itself vibrate according to the sound signal input to the sound signal input portion. The sound collection portion collects sound by converting the vibration of the card-shaped substrate itself into an electric signal.

Abstract: The present invention provides an audio information support system comprising an image display device (1) which shows an image, an audio output device (2) which outputs an electromagnetic wave modulated by audio information toward any given positions in the image shown on the image display device (1), and an audio reproducing terminal (3) which receives the electromagnetic wave at the position in the image, converts it to an electric signal and reproduces sound from that electric signal, wherein audio information support can be individually realized for each of the users watching the image.

Abstract: A small earphone or headphone which can produce a wide band acoustic output from a low-pitched tone to a high-pitched tone and can generate a body-sensitive vibration independent output or a body-sensitive vibration output synchronized with a music. The earphone or headphone is mounting a vibration actuator which is provided with a magnetic circuit including a permanent magnet, a yoke, and a plate for concentrating the flux of the permanent magnet, with a coil disposed in an air gap of the magnetic circuit, with a diaphragm fixed with the coil and being imparted with a driving force therefrom, and with a vibration transmitting section for supporting the magnetic circuit flexibly through a suspension comprising a flexible spring.

Abstract: Actuator systems for oral-based appliances utilizing transducers which are attached, adhered, or otherwise embedded into or upon a dental or oral appliance to form a hearing aid assembly. Such oral appliances may be a custom-made device which receives incoming sounds and transmits the processed sounds via a vibrating transducer element. The transducer element may utilize electromagnetic or piezoelectric transducer mechanisms and may be positioned directly along the dentition or along an oral appliance housing in various configurations.

Abstract: A waterproof recreational audio device and method that transmits sound via transcutaneous bone conduction provides high fidelity musical signals to a user. The device can be worn on the head of a user and integrated into various types of headgear. The device is tunable for sound quality and comfort by adjusting and moving the sound transmitting transducers around the head of the user. The present invention preferably uses transducers to produce sounds in the low, mid and high frequency ranges. A sound source for the musical signal can also be provided as part of the waterproof recreational audio device. Controls enable the user to select volume levels for the high, mid and low frequency ranges, while a volume limiter restricts the mid range to a preset maximum volume level to allow external ambient sounds to be heard via the ear canal and protects the hearing of the user.

Abstract: A bone conduction hearing aid includes an in-the-ear (ITE) component and a behind-the-ear (BTE) component. A bone vibrator is carried by the ITE component and positioned in the concha of the ear when in use. A vibrationally conductive structural member of the ITE component conducts vibration produced by the vibrator into the ear canal. From there, the vibration is transferred to a cochlea of the user by way of the mastoid bone, enabling enhanced hearing perception in patients with hearing loss.

Abstract: A bone conductive speaker is downsized without causing any loss in efficiency, simple in construction low in cost, and comprises yoke (2), magnet (3) disposed in a central area of the yoke, and voice coil (4) wound on the magnet. The yoke has its peripheral area divided into a plurality of upright portions; of the upright portions, each of first ones (5) oppositely disposed from each other is provided with a first engaging means (9) in its upper surface; second engaging means (8) each corresponding to the first engaging means are provided in a vibrating plate (7). The vibrating plate is mounted on a lid portion of the housing in a manner such that the vibrating plate is disposed on the upright portions of the yoke and fixedly mounted by means of the second engaging means in a manner such that the vibrating plate floats in the housing.

Abstract: An electronic device with earpiece. The electronic device with earpiece includes a main body, an earpiece body and a hook. The earpiece body is detachably inserted in the main body. The hook includes a segment. The hook is movably disposed on the earpiece body between a first position and a second position. When the hook is in the first position, the segment abuts the earpiece body, and when the hook is in the second position, the segment is spaced apart from the earpiece body.

Abstract: A tooth microphone apparatus worn in a human mouth that includes a sound transducer element in contact with at least one tooth in mouth, the transducer producing an electrical signal in response to speech and a means for transmitting said electrical signal from the sound transducer to an external apparatus. The sound transducer can be a MEMS accelerometer, and the MEMS accelerometer can be coupled to a signal conditioning circuit for signal conditioning. The signal conditioning circuit can be further coupled to a transmitter. The transmitter can be an RF transmitter of any type, an optical transmitter, or any other type of transmitter. In particular, it can be a bluetooth device or a device that transmits into a Wi-Fi network or any other means of communication. The transmitter is optional.

Abstract: A variable-reluctance type vibrator for generating vibrations in a bone anchored hearing aid. The vibrator includes a vibrator plate and a bobbin base with a vibrator gap therebetween. The vibrator gap between the vibrator plate and the bobbin base, or some other spacing in the vibrator where a relative movement between two surfaces is generated during the vibratory function, is at least partially filled with a fluid or gel for providing the main part of the damping of the resonance frequency of the vibrator.

Abstract: The invention provides an optimal structure able to reduce sound leakage and improve transmission characteristics and control a vibration transmitting path of internal and external portions in a living organism conductive actuator. Therefore, the living organism conductive actuator has a communication signal transmitting portion for transmitting a communication signal in contact with an operator's wrist, hand, hand rear portion, finger, or nail tip, and a voice input portion.

Abstract: The object of the present invention is to provide an acoustic vibration system with a speaker for air mattresses. This vibration system includes an air mattress (20) consisting of a sealed body and inflated with air. One or more speakers (30) are mounted on the sealed body of the mattress, and are connected to an external audio system (31). The speakers (30) thus convert electrical energy outputted from the audio system (31) into sound energy, and radiate the sound energy into air inside the mattress (20), thus acoustically vibrating the mattress. In the vibration system, the sealed body of the mattress is made of a three-dimensional woven fabric (1) such that the sealed body has a desired durability and effectively resists expansion pressure. A coated layer is formed on the internal surface of the woven fabric (1) so as to prevent a flow of air through the fabric.

Abstract: An invented sound and image producing system is disclosed. The system may include a cartridge that stores, processes and controls data representative of sound and/or images, and a player that provides the interface, annunciation and transduction of sound and/or images. The cartridge includes a computer integrated circuit or chip that stores and transmits signals from which sound and/or images may be produced. The system also may include a source of signals representative of sound, an audio port associated with the source and through which signals representative of sound may be sent, and a device configured to receive and store signals representative of sound, and to produce sound from such signals, where the device is configured to connect with the audio port and to receive and store signals representative of sound transmitted from the source through the audio port to the device.

Abstract: A hearing aid anchoring fixture (104) for anchoring a direct bone conduction hearing aid (108) to the skull bone (106), comprising a threaded portion (110) that has at least one cutting edge (118). Each cutting edge (118) has an adjacent cavity (120) having a volume Vc. The threaded portion (110) has a thread depth dt being half of the difference between the maximum outer diameter d1 of the threaded portion (120) and the inner diameter d2 of the thread, where dt is at least 10% of the maximum outer diameter d1 of the threaded portion (110) and where dt is less than 20% of the maximum outer diameter d1 of the threaded portion (110). The fixture (104) may be equipped with a flange portion (114) that has an outer diameter d3 being greater than the maximum diameter d1 of the threaded portion (110).

Abstract: Disclosed is a multi-function actuator comprising: a case having an internal space; a vibrating coil installed in the case for generating vibration; a diaphragm for generating sound with an outer end being fixed to the upper end of the case; a voice coil fixedly installed in the bottom of the diaphragm for generating sound according to a sound source and having an notch filter; a vertically magnetized magnet; an upper plated attached to the magnet for constituting a magnetic circuit; a yoke for constituting the magnetic circuit together with the magnet; a weight for constituting a vibrator body together with the magnet, the upper plate and the yoke; and a suspension spring for supporting the vibrator body. In generating sound, sound quality is improved without influencing sound while vibration is reduced.

Abstract: An object of the invention resides in the provision of a bone conduction headset, which is inconspicuous in appearance during wearing thereof, adapted for use in avoiding absorbing nearby people's attention to the headset thus worn, easy to wear and take off in use, and comprises: a band running around a back part of the user's head; a fastening portion formed in each of opposite end portions of the band; a bone conduction speaker provided with a knob which is engaged with the fastening portion; and, an ear engagement portion, which runs over the bone conduction speaker during wearing of the headset to reach and engage with the user's ear. An extension of either the fastening portion in the band or a casing of the bone conduction speaker may be formed into the ear engagement portion.

Abstract: The hearing-aid interconnection system has a skin-penetrating hearing-aid abutment (2) and a fixture (4) anchored in a skull bone (6). A first press fit is formed between a first contact surface (8a) of the abutment and a first fixture contact surface (10a) of the fixture. The first abutment contact surface extends around the first fixture contact surface. A second press fit is formed between a second contact surface (8b) of the abutment and a second fixture contact surface (10b) of the fixture. The second fixture contact surface extends around the second abutment contact surface.

Abstract: A handsfree structure with antibackground noise function, comprising: a male plug, coupled to an output of a mobilephone; a voice receiving device, coupled to said male plug by a wire for picking up a voice signal of a user; a reaction type voice receiving device, coupled to said male plug by said wire for picking up said voice signal of said user by sensing the vibration of skin of said user; and a earphone set, coupled to said male plug by said wire for transformation a electric signal received from said mobilephone into a voice signal; while said mobilephone receiving a call, said user could switch said handsfree structure from said voice receiving device to said reaction type voice receiving device or from said reaction type voice receiving device to said voice receiving device according to a background noise of the environment for getting more clear voice signal so as to improve the communication quality of a high background noise environment.

Abstract: A transceiver adapted for mounting upon straps of a gas mask or a helmet is smaller in size and weight, and therefore excellent in fittingness, which makes handling of the transceiver less cumbersome even when a user wears the gas mask or the helmet. The transceiver enables a user to communicate with his or her communication partner even when the user does his or her own work. In construction, the transceiver (1) has a rotatable casing (2). The casing (2) receives therein a bone conduction speaker portion (3) and a bone conduction microphone (4), and is pivoted to a supporting member (5). The supporting member (5) is provided with engaging means (7 and 8), which engage with straps (11 and 12), respectively.