Abstract: The present invention provides a wireless hands-free apparatus with a sound-absorbing function. The hands-free apparatus has improved talking quality when used with a bluetooth earphone. The hands-free apparatus has an earphone with a built-in wireless communication module therein, a membrane sound capture device for receiving the input of the sound wave and a connecting line connected between the earphone and the membrane sound capture device. The membrane sound capture device can receive the user's sound wave and propagate the sound by the wireless communication module of the earphone through the connecting line.

Abstract: An apparatus for bone conduction hearing testing is provided. The apparatus comprises a planar spring having opposed first and second elements to which are coupled, respectively, a bone conduction vibrator and an engagement element. The bone conduction vibrator contacts a first head portion, preferably the forehead, and the engagement element contacts a second head portion, preferably the rear of the head. The spring preferably has a lenticular shape, and may be either biconvex or D-shaped.

Abstract: A low-cost transceiver capable of being connected with a telephone or a radio set is thin and small in size, excellent in easiness in use, stable in mounting condition, and is therefore suited for those who are active in the outdoor work, sports or the like. When a wearer of the transceiver is sweated and/or exposed to dust, a sweat- or dust-damaged component of the transceiver is replaced with a new one. The transceiver comprises: a bone conduction speaker (2); a throat microphone (3); a soft tape-like carrier (1) for supporting both the supporting the speaker (2) and the microphone (3); and, adhesive means (6) for adhesively fixing the carrier (1) to the temporal area covering the ear and the larynx of the wearer.

Abstract: The present invention is a method and apparatus for applying a focused, directed audio beam at a fetus to stimulate the fetus in utero. An ultrasound signal is amplitude modulated with an audio range signal, and directed to an ultrasound transducer positioned on the abdomen of a pregnant woman. A focused beam from the ultrasound transducer is directed at the head of a fetus, wherein the resultant audio signal stimulates the middle ear, causing the fetus to move. Motion of the fetus can be tracked to test hearing in individual ears or to test the general health of the fetus. Furthermore, the focused beam can be successively directed at the fetus to cause to the fetus to move to a selected location in the womb for clinical testing or delivery.

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 apparatus and method for inner ear implants is provided that generates signal processing stochastic independence activity across the excited neural population. A high rate pulse train can produce random spike patterns in auditory nerve fibers (hereafter “pseudospontaneous activity”) that are statistically similar to those produced by spontaneous activity in the normal auditory nerve. We call this activity “pseudospontaneous”. Varying rates of pseudospontaneous activity can be created by varying the intensity of a fixed amplitude, high rate pulse train stimulus, e.g., 5000 pps. The high rate pulse train can desynchronize the nerve fiber population and can be combined with a data signal in an inner ear implant. The pseudospontaneous activity can enhance neural representation of temporal detail and dynamic range with an inner ear implant such as a cochlear implant. The pseudospontaneous activity can further eliminate a major difference between acoustic-and electrical-derived hearing percepts.

Abstract: A vocal transmitter device includes a cable-receiving structure, an earphone, a fastener and a microphone. The cable-receiving structure has a case, a cable-winding plate, a connection cable, and a spiral spring. The spiral spring and the cable-winding plate are arranged in the case and connected to each other. The earphone is connected to a terminal of the connection cable. The fastener is connected on the case of the cable-receiving structure. The microphone is arranged either in the case of the cable-receiving structure or in the fastener. Another terminal of the connection cable is connected to the microphone. A miniature vocal transmitter device is hence accomplished.

Abstract: A speaker for a portable phone capable of being assembled without bonding by adhesives is disclosed. The speaker has a protector having a plurality of sound holes, and having an annular tension extension formed at a periphery thereof and extended upwardly and outwardly; a frame having a stepped portion and a cylindrical wall extended upwardly from the periphery of the stepped portion and having locking means; a diaphragm seated on the stepped portion of the frame and intended to generate sound; a voice coil attached to a lower surface of the diaphragm and adapted to vibrate; a top plate disposed in the voice coil; and a magnet fixedly disposed between the top plate and the frame and adapted to generate a predetermined magnetic field.

Abstract: A communication device comprising a microphone, a conduction interface and an electromechanical force transducer mounted to the conduction interface to drive the interface to conduct sound to a user by bone conduction, characterised in that the transducer has an intended operative frequency range and comprises a resonant element having a frequency distribution of modes in the operative frequency range and coupling means for mounting the transducer to the interface.

Abstract: A bone conduction speaker, in which a sound is sufficiently improved in tone quality by suppressing an unnecessary vibration of a vibration system and preventing generation of an abnormal sound due to an abnormal resonance, comprise: a bone conduction speaker unit constructed of a yoke, a voice coil, a magnet, a vibrating plate and a vibration block integrated with the vibrating plate; and, a housing which contains the bone conduction speaker unit to function as a vibrating portion; wherein; the vibration block of the bone conduction speaker unit is fixedly mounted on an upper surface of the interior of the housing; and, the yoke is supported by the damping member which is disposed inside the housing.

Abstract: The invention relates to a device for listening to voice and/or musical signals by means of cranial bone transmission, comprising a case (8, 15) having a forward frontal face, which is sealed by a flexible membrane (11), and a rear frontal face (15a), which consists of a rigid, hermetic wall, and comprising a piezoelectric element (1) having suitable dimensions in order for same to be integrated in the case, means (18) for supporting the piezoelectric element which are suitable for joining the periphery of the latter to the case in a solid manner, in such a way as to divide the internal volume of the said case into two hermetic chambers: a forward chamber (6) filled with an incompressible gel or fluid, and a rear chamber (7) comprising damping means (28) suitable for compensating the stresses exerted on the piezoelectric element (1) which result from the forces exerted on the flexible membrane (11).

Abstract: The invention relates to a hearing aid apparatus of the type which is intended for sound transmission from one side of the head to the cochlea on the other side of the head for rehabilitation of patients with unilateral hearing loss, i.e. individuals with normal or a slightly impaired hearing on one ear and a profound hearing loss in the inner ear on the other side of the head. The hearing aid apparatus is based on the hone conducting principle for bone anchored hearing aids and comprises a vihrotary generating part which is mechanically anchored by means of osscointegration in the skull bone (2) at the deaf side of the patient and arranged to transmit vibrations through the skull bone from the deaf side to the inner ear on the other side of the patient. The frequency characteristics of the apparatus is preferably adapted in such a way that the amplification is higher for frequencies above 1 kHz than for lower frequencies which is in contrast to an ordinary bone anchored hearing aid.

Abstract: A method of communicating of the present invention includes broadcasting a signal from a transmission point. The power of the signal is limited such that the signal will attenuate within a predetermined distance from the transmission point. The signal is received by a receiver. A communication system includes a transmitter and a receiver. The transmitter is adapted to broadcast a first signal which attenuates within a predetermined distance from the transmitter. The receiver is adapted to receive the first signal. The method and system can be used to imperceptibly transmit voice data.

Abstract: An audio device has an electroacoustic transducer mounted on a clamp for converting an electric signal into an acoustic signal, an electromechanical vibration transducer for converting the electric signal into a mechanical vibration, and an abutting member having the electromechanical vibration transducer therein and mounted on the clamp so that the electromechanical vibration transducer is contacted with a cervix of a user when the audio device is worn on the head of the user.

Abstract: A device for determining and characterizing noises generated by masticating food has an enclosure and a mastication device arranged in the enclosure. One or more first reception microphones for airborne sound are arranged in the enclosure. The enclosure is advantageously a dummy head for audio recording. Preferably, two such first reception microphones are arranged in the enclosure. Two second reception microphones for sound conducted by solid material, simulating bone conduction, may be provided in order to create a sound as near-natural as possible.

Abstract: The present invention is a method and apparatus for applying a focused, directed audio beam at a fetus to stimulate the fetus in utero. An ultrasound signal is amplitude modulated with an audio range signal, and directed to an ultrasound transducer positioned on the abdomen of a pregnant woman. A focused beam from the ultrasound transducer is directed at the head of a fetus, wherein the resultant audio signal stimulates the middle ear, causing the fetus to move. Motion of the fetus can be tracked to test hearing in individual ears or to test the general health of the fetus. Furthermore, the focused beam can be successively directed at the fetus to cause to the fetus to move to a selected location in the womb for clinical testing or delivery.

Abstract: The invention discloses an improved bone conduction sensor capable of use within a voice sound transmitting apparatus. The bone conduction sensor is adapted for placement in the external auditory canal of the user in a nonocclusive fashion. The bone conduction sensor has a contoured surface adapted-to fit against a wall of the external auditory canal increasing the surface area contact between the bone conduction sensor and the wall of the external auditory canal. The bone conduction sensor may also be associated with one or more contact sensors adjacent the bone conduction sensor for determining contact between the bone conduction sensor and the wall of the external auditory canal. In addition, the invention provides for the bone sensing element to be separated from the circuit portion of the bone conduction sensor so that the circuitry may be removed to the behind the ear portion of the earpiece.

Abstract: The invention relates to a vibrator specifically for a hearing aid device of the bone conduction type, i.e. a hearing aid device by which the sound information is mechanically transmitted via the skull bone directly to the inner ear of a person with impaired hearing. The vibrator comprises a coil which is divided into two coil halves (1a, 1b) for generating a dynamic magnetic field and a permanent magnet (3) for generating a static magnetic field. The permanent magnet (3) is radially magnetized and arranged in such a way that the static and dynamic magnetic fields are coinciding in the air gaps (6a, 6b) formed between the coil and magnet arrangement and the casing (4), whereby the vibrator provides an axial force (7). Preferably, the entire coil and magnet arrangement is enclosed in a casing (4) which forms a part of the magnetic circuit and protects the vibrator and reduces magnetic leakage.

Abstract: The present invention is a method and apparatus for applying a focused, directed audio beam at a fetus to stimulate the fetus in utero. An ultrasound signal is amplitude modulated with an audio range signal, and directed to an ultrasound transducer positioned on the abdomen of a pregnant woman. A focused beam from the ultrasound transducer is directed at the head of a fetus, wherein the resultant audio signal stimulates the middle ear, causing the fetus to move. Motion of the fetus can be tracked to test hearing in individual ears or to test the general health of the fetus. Furthermore, the focused beam can be successively directed at the fetus to cause to the fetus to move to a selected location in the womb for clinical testing or delivery.

Abstract: The invention relates to a hearing aid device of the bone conduction type, i.e. a hearing aid device in which the sound is mechanically transmitted via the skull bone directly into the inner ear of a person with impaired hearing. The hearing aid device is divided into an implantable part (5) which comprises a vibrator (7) for generating vibrations correponding to the received sound information and an external part (1) with microphone (7) and electronic circuitry (3). The entire implantable part (5), including the vibrator (7), is housed in a unit which is arranged partly outside the skull bone and anchored by means of osseointegration. The power to the implantable part (5) is transmitted by induction from the external part (1) when the device is used.

Abstract: A beat detection system provides tactile stimulation in response to musical characteristics and in particular to repetitive musical beat information. The device processes multiple acoustic bands and separates out the beat information from each band. Each band provides beat information to respective tactile mechanisms that convey the beat information to the user. The device can be worn by a person with a hearing disability to enable them to appreciate the beat of music.

Abstract: The invention relates to a vibrator specifically for a hearing aid device of the bone conduction type, i e a hearing aid device by which the sound information is mechanically transmitted via the skull bone directly to the inner ear f a person with impaired hearing. The vibrator comprises a coil (1) for generating a dynamic magnetic field and two permanent magnets (3a, 3b) for generating a static magnetic field. The two permanent magnets (3a, 3b) are working independently from each other in the magnetic circuit and an arranged in such a way that the static and dynamic magnetic fields are substantially separated from each other, but coinciding in the air gaps (6a, 6b) formed between the coil and magnet arrangement and the casing (4), whereby the vibrator provides an axial force (7). Preferably, the entire coil and magnet arrangement is enclosed in a casing (4) which forms a part of the magnetic circuit and protects the vibrator and reduces magnetic leakage.

Abstract: Disclosed is a bone-conduction transducer comprising a plate-shaped yoke bent to form a pair of cut portions at both ends thereof; voice coils fitted to a center extension of the cut portions; a magnet and a plate of rectangular parallelepiped shape disposed between the voice coils; and a diaphragm minutely spaced from a lower part of the plate. The present invention constructed as above has an advantage of optimizing the bone-conduction transducer by fitting the voice coils to both the center extensions of the yoke to convert electrical signals into magnetic attractive and repulsive forces, and arranging the magnet and the plate between the voice coils.

Abstract: A modulation process with a fully suppressed carrier and input preprocessor filtering to produce an encoded output; for amplitude modulation (AM) and audio speech preprocessor filtering, intelligible subjective sound is produced when the encoded signal is demodulated using the RF Hearing Effect. Suitable forms of carrier suppressed modulation include single sideband (SSB) and carrier suppressed amplitude modulation (CSAM), with both sidebands present.

Abstract: A wearable and hands free earphone includes a hollow sleeve of the size able to be fitted into an ear of a user and having a driver element and a microphone element inside. When the user makes a telephone call, voice vibrations are conveyed through the ear of the caller and transmitted to the receiving parry via the microphone element, while the voice of the receiving party is transmitted to the ear of the caller via the driver element. Besides, an isolator component is disposed inside the hollow sleeve between the driver element and the microphone element such that the separation effectively reduces acoustic cross talk interference between the driver element and microphone element.

Abstract: A cellular telephone system, including a cellular telephone transceiver unit, an ear piece which receives the voice vibrations of a user, and a wireless linkage operatively connecting the ear piece to the cellular telephone transceiver unit, allows a user to be in a hands-free mode when using a cellular telephone. The cellular telephone transceiver unit includes a personal digital assistant and a pager with a vibration module. The ear piece generally uses a bone sensor along with an air sensor placed in the external auditory canal of the user to detect the voice vibrations of the user. Further, a speaker is included in the ear piece to allow the user to hear incoming data from the cellular telephone transceiver. The wireless linkage uses low power radio frequency waves to send and receive signals between the ear piece and the cellular telephone transceiver unit. Both the ear piece and the cellular telephone transceiver unit require power which is supplied by batteries.

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.

Abstract: A pressure tranducing assembly for converting received pressure into a digital pressure signal. A pressure transmitter adapted to receive a first mechanical pressure from an environment and to transmit that pressure to a pressure processor. The pressure processor is adapted to generate the second or internal mechanical pressure therein in accordance with the first pressure. The pressure processor comprises a pressure signal generator to generate a first analogue pressure signal representative of the second pressure. A pressure compensator within the pressure processor is adapted to receive an analogue pressure compensation signal and to generate an additional pressure to compensate the second pressure at least in part. A pressure signal processor processes the first analogue pressure signal and has negative-feedback capabilities to generate the analogue pressure compensation signal and to generate a digital pressure signal that is representative of at least the second internal pressure as an output signal.

Abstract: Disclosed is a bone-conduction transducer comprising a plate-shaped yoke bent to form a pair of cut portions at both ends thereof; voice coils fitted to a center extension of the cut portions; a magnet and a plate of rectangular parallelepiped shape disposed between the voice coils; and a diaphragm minutely spaced from a lower part of the plate. The present invention constructed as above has an advantage of optimizing the bone-conduction transducer by fitting the voice coils to both the center extensions of the yoke to convert electrical signals into magnetic attractive and repulsive forces, and arranging the magnet and the plate between the voice coils.

Abstract: A double-functioned hand-free device for cellular telephone comprises a microphone casing having one end connected with a neck hanger, wherein a direct sound-receiver circuit and a circuit for sensing vibration of vocal cords are housed in the microphone casing; and a slew cover on the microphone casing is provided for control and switch the circuits alternatively to meet on-the-spot requirements.

Abstract: A bone conduction speaker, in which a sound is sufficiently improved in tone quality by suppressing an unnecessary vibration of a vibration system and preventing generation of an abnormal sound due to an abnormal resonance, comprises: a bone conduction speaker unit constructed of a yoke, a voice coil, a magnet, a vibrating plate and a vibration block integrated with the vibrating plate; and, a housing which contains the bone conduction speaker unit to function as a vibrating portion; wherein; the vibration block of the bone conduction speaker unit is fixedly mounted on an upper surface of the interior of the housing; and, the yoke is supported by the damping member which is disposed inside the housing.

Abstract: A headset includes earpieces for attaching to ears of an operator. A band has opposite ends that connect to the two earpieces and extends in a forward direction from the two earpieces. The band then either extends downwardly below the chin or extend backwards in back of the neck. In one implementation, the headset is used for two-way communications with one earpiece containing a microphone and the other earpiece containing a speaker.

Abstract: A bone conduction microphone and speaker mountable in contact with a user's head or head area, each utilize a strategically mounted audio transducer that is preferably a piezoelectric ceramic bender. In the case of the speaker, the bender is coupled to an audio transformer which may or may not be potted with the bender within the same housing. Additionally, the speaker bender is mounted on a foam layer either with or without a supporting shelf depending on the desired application. The microphone bender is potted within the housing and includes a JFET and resistor mounted directly to the elements of the bender. The present microphone is designed to create the largest possible acoustic mismatch with air while nearly matching the acoustic impedance to the human skill structure. This attenuates the amount of ambient air noise coupled sound receivable into the microphone by greater than 80 dB. The speaker is designed with acoustic impedance matched for bone conduction sound.

Abstract: A headset with both a bone conduction speaker (1) and a microphone (2) is: excellent in fittingness to a wearer's head; free from any feeling of physical disorder; comfortable in use for a long period of time; and, substantially free from howling produced between the bone conduction speaker (1) and the microphone (2), and has its headband (3) run round the back part and the top part of the head. The headband (3) has its opposite ends carry a pair of head pads (5) held in abutting contact with opposite sides of the head. At least one of the head pads (5) carries both the bone conduction speaker (1) and the microphone (2).

Abstract: An integral micro-speaker having bi-directional dual magnetic field loops is provided. In general, the integral micro-speaker is incorporated into a wireless communication device such as a wireless telephone or a mobile telephone. The integral micro-speaker serves as a receiver and a speaker in a wireless telephone. The integral micro-speaker may further incorporate a vibrator for producing an added vibration function to the wireless telephone. In other words, a receiver, a speaker and a vibrator may be combined together to form an integral component inside the wireless telephone.

Abstract: A bone conduction hearing aid includes a vibrator carried by the insertion end of the hearing aid. When the hearing aid is inserted into the ear canal of a patient, the vibrator is positioned in the ear canal adjacent the mastoid bone. A microphone receives sound waves and outputs a microphone signal to the hearing aid electronics where the microphone signal is amplified and then sent to the vibrator, causing the vibrator to vibrate. Vibrations produced by the vibrator are transferred to the opposite cochlea by way of the mastoid bone, enabling enhanced hearing perception in patients with hearing loss in one ear. Transfer of vibrations to the bones of the middle ear also assists patients with conductive pathology in one ear. The hearing aid may also function to enhance communication in high noise environments. Feedback from the vibrator to the microphone is eliminated electronically. Various alternate forms of feedback elimination are also contemplated by the invention.

Abstract: The scope of the present invention is an earphone unit (11) to be mounted either on external ear (18) or in auditory tube (10), in which unit both a speech registering microphone (13) and a speech reproducing ear capsule (12) have been placed. The earphone unit (11) is suitable for use in connection with various terminal devices, in particular with mobile stations. When a user's speech is registered, the ear capsule signal (12′) containing disturbances is canceled utilizing methods based upon determining the transfer function between the ear capsule (12) and the microphone (13). A separate error microphone (14) is used for eliminating external sources of disturbances (17), such as noise. In order to improve the quality of speech and prevent problems caused by double-talk, signals (15′, 12′, 17′) are processed digitally utilizing e.g. band limitation and prediction of missing bands.

Abstract: A system for voice communications is disclosed. The system includes a computer having a housing, a short-range transceiver operatively connected to the computer, a voice transceiver operatively connected to the computer, a handsfree voice communications unit in communication with the short-range transceiver, the computer adapted to receive voice sound information from the short-range transceiver, the computer adapted to receive voice sound information from the voice transceiver, the computer adapted to send voice sound information to the short-range transceiver, and the computer adapted to send voice sound information to the voice transceiver. The present invention also includes methods for voice communication. These include transceiving voice sound information between a handsfree voice communication unit and a computer over a short-range of first communications channel and transceiving voice sound information between a computer and a remote location over a second communications channel.

Abstract: A ceramic piezoelectric type microphone includes a lower cover and an upper cover, and a receiving space confined by the lower and upper covers when they are connected. A signal wire is led in the receiving space via an extension portion of the lower cover and passes through a substrate to connect to an electrical circuit board. The other side of the circuit board is connected to a piezoelectric ceramic plate. A high-density foam body is sandwiched between the piezoelectric ceramic plate and a securing portion on an inner side of the upper cover. When a ratio value of a diameter of the surface of the upper cover to a contact thickness formed by the upper cover is greater than 0.15, sound waves generated as a result of contact between cover surfaces and the user's throat skill pass through the foam body to the piezoelectric ceramic plate to be directly converted into a signal output, thereby eliminating most of the background noise except the sound of the user's voice.

Abstract: A method for expressing a vibratory music that may be felt as a piece of music for a human being in according with an acoustic vibration in an auditory region and/or a body sensible vibration or a body sensible acoustic vibration and an apparatus therefor are obtained. A signal about 16 Hz to 150 Hz (sound compass C0 to D3) in a frequency band of a body sensible vibration is used and what is composed and arranged in combination of strength, length, frequency, waveform and overlap of the vibration on a time basis, based upon a constant theory is expressed as a vibratory music. Transducers 5 are assembled into a backrest, a seat portion and a leg portion of a reclining seat, respectively. Speakers are mounted on a head portion. The transducers for outputting the sound vibrations are provided on both arm rests.

Abstract: A device for determining and characterizing noises generated by masticating food has an enclosure and a mastication device arranged in the enclosure. One or more first reception microphones for airborne sound are arranged in the enclosure. The enclosure is advantageously a dummy head for audio recording. Preferably, two such first reception microphones are arranged in the enclosure. Two second reception microphones for sound conducted by solid material, simulating bone conduction, may be provided in order to create a sound as near-natural as possible.

Abstract: An electroacoustic transducer 1 comprises a base 24 made of a magnetic material, a magnetic core 22 erected on the base 24, a diaphragm 20 made of a magnetic material and spaced from the magnetic core 22, a magnet 25 constituting a magnetic circuit together with the base 24, the magnetic core 22, and the diaphragm 20 and supplying a static magnetic field, a coil 23 placed around the magnetic core 22 for supplying an oscillating magnetic field to the magnetic circuit, a support ring 26 for supporting the diaphragm 20, a lower housing 30 for accommodating such members, and an upper housing member 10 press-fitted over the entire periphery of the support ring 26.

Abstract: The present invention purposes to realize an electro-mechanical and acoustic transducer capable of generating both strong vibration and sound. In an electro-mechanical and acoustic transducer of the present invention, mass of a mechanical vibration system of the electro-mechanical and acoustic transducer is increased by attaching a weight to a magnetic circuit unit or integrated the weight with the magnetic circuit unit, whereby large vibration is obtained from the electro-mechanical and acoustic transducer.

Abstract: A sound processing unit contains a speaker disposed at a position on a body of the sound processing unit, which outputs an input sound signal; a microphone disposed at another position on the body of the unit; a vibration pick-up disposed at a position near the speaker on the body of the unit such that the ear of the user touches the pik-up during conversation, which detects a bone conduction sound and which outputs it as a bone conduction sound signal; and a double talk detector that compares a level of the input sound signal with a level of the transmitting signal, and outputs a state signal to indicate a receiving state when the level of the input sound signal is judged to be more than a first specific value and the level of the transmitting signal is judged to be less than a second specific value.

Abstract: A yoke 1 having a center magnetic pole 2 around which a voice coil is wound is provided, the yoke 1 is extended in four directions, magnets 4 are disposed on two parts 7 and 7 facing to each other among the extensions, respectively, and diaphragm fixing sections 6 are erected on the other two parts 8 and 8 and a diaphragm is fixed on the diaphragm fixing section 6.

Abstract: Audio apparatus comprises a base unit including circuitry for generating electrical signals representing sounds and at least one earphone adapted to receive the electrical signals and to reproduce sounds represented by the signals, in which the apparatus is provided externally with a terminal arranged so that it can be positioned in use in contact with or in close proximity to the surface of the user's body. The circuitry is arranged to supply to the terminal signals which are transmitted through the user's body, the or each earphone is provided with a terminal arranged so that it can be positioned in use in contact with or in close proximity to the surface of the user's body so as to receive signals transmitted from the terminal through the user's body, and the or each earphone includes receiving circuitry arranged to receive the signals. The earphones may be embodied in a pair of spectacles, and may be adjustable between a first position behind the ear and a second position in or more adjacent the ear.

Abstract: A device for transmitting sound waves between a signal source and a user's ears, wherein the sound waves bypass the air. The invention generally comprises a signal source configured to produce signals representative of sound, and a sound-transmitting element operatively associated with the signal source to which the signal source can transmit such signals for transmission through the sound-transmitting element to a user's mouth, from which the signals are conducted by teeth and bones to the user's ears to be perceived as sound. The signal source generally comprises an source that may produce sound waves directly or indirectly with the assistance of a transducer. The sound-transmitting element generally comprises any element that may transmit signals representative of sound upon contact with a user's mouth and may include edible substances, eating utensils, and writing implements, among others.

Abstract: A massaging musical device is provided including a music source adapted to generate a musical electric signal corresponding to music at an output thereof. A listening mechanism is adapted to be situated adjacent ears of a user and releasably connected to the music source for allowing the user to listen to the music. At least one pad is included for subjecting human muscle tissue to the musical electric signal. A control unit includes a timer connected between the music source and the listening mechanism and the electrodes for terminating the transmission of the musical electric signals thereto after the cessation of a user-selected time interval.

Abstract: The invention provides a portable apparatus which eliminates noise generated by vibrations of an EL device without adhering a vibration preventing sheet to the apparatus. Microprocessor 3 of the portable apparatus displays characters and a graphic form on display unit 1, and in order to illuminate display unit 1, microprocessor 3 controls EL device driver 5 to generate an AC voltage and causes EL device 4 to emit light. EL device 4 vibrates itself with a frequency equal to the frequency of a driving voltage and generates noise. An output voltage signal having a voltage and a phase converted by reverse phase generator 6 is applied to receiver 7. Consequently, sound of a phase reverse to that of the generated noise is generated from receiver 7. The sound of the phase reverse to that of the noise generated from EL device 4 is combined in a space in front of the receiver with the noise generated from EL device, thereby cancelling the noise generated from EL device 4.

Abstract: A taut armature reciprocating impulse transducer (100) which typically provides a non-linear hardening spring response is adapted to provide a non-linear softening spring response by the addition of magnetic damping elements (106). Two or more taut armature reciprocating impulse transducers (100) can be utilized to produce a mechanical acoustic crossover network (700) which operates to produce a wide frequency response when at least one of the two taut armature reciprocating impulse transducers (100) is adapted to provide a non-linear softening spring response. The mechanical acoustic crossover network (700) allows multiple taut armature reciprocating impulse transducers (100) to be operated together from a signal input. When the mechanical acoustic crossover network (700) is enclosed in a housing (812), the mechanical acoustic crossover network (700) can be operated as a headphone to deliver an audio output.