Abstract: A wireless headset is adapted to communicate with a sound source such as a music player or a cell phone or a suitable audio or sound communicated through a one-way or two-way communication device. The headset includes a mouth wearable communicator; and a linking unit coupled to the mouth wearable communicator, the linking unit adapted to communicate with the sound source.

Abstract: A communication apparatus includes a bone conduction communication apparatus with a housing having a shape which is conformable to at least a portion of at least one tooth of a user; a transceiver mounted in the housing; and a transducer disposed within or upon the housing and in vibratory communication with a surface of the at least one tooth to transmit sound through the at least one tooth. A positioning system is provided to transmit positional information to the transceiver to be delivered to the transducer; and a communication device links the transceiver with a second person. The electronic and transducer assembly may receive incoming sounds either directly or through a receiver to process and amplify the signals and transmit the processed sounds via a vibrating transducer element coupled to a tooth or other bone structure, such as the maxillary, mandibular, or palatine bone structure.

Abstract: Methods and apparatus for transmitting vibrations via an electronic and/or transducer assembly through a tooth or teeth 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. The electronic and transducer assembly may receive incoming sounds either directly or through a receiver to process and amplify the signals and transmit the processed sounds via a vibrating transducer element coupled to a tooth or other bone structure, such as the maxillary, mandibular, or palatine bone structure.

Abstract: A method and device for connecting a bone conductor transducer contained in a housing to the skull bone for the transmission of vibrations characterized by, that the housing has at least one surface, which is placed against the bottom plane of a recess shaped in the temporal bone with a static force exceeding the dynamic signal forces.

Abstract: A communication apparatus includes a bone conduction communication apparatus with a housing having a shape which is conformable to at least a portion of at least one tooth of a user; a transceiver mounted in the housing; and a transducer disposed within or upon the housing and in vibratory communication with a surface of the at least one tooth to transmit sound through the at least one tooth. A positioning system is provided to transmit positional information to the transceiver to be delivered to the transducer; and a communication device links the transceiver with a second person. The electronic and transducer assembly may receive incoming sounds either directly or through a receiver to process and amplify the signals and transmit the processed sounds via a vibrating transducer element coupled to a tooth or other bone structure, such as the maxillary, mandibular, or palatine bone structure.

Abstract: Various methods and apparatus for processing audio signals 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. Additionally, a multiband actuation system may be used where two or more transducers each deliver sounds within certain frequencies. Also, the assembly may also utilize the sensation of directionality via the conducted vibrations to emulate directional perception of audio signals received by the user. Another feature may include the ability to vibrationally conduct ancillary audio signals to the user along with primary audio signals.

Abstract: A digital audio player device can be attached, adhered, or otherwise embedded into or upon a removable oral appliance or other oral device to form an intraoral MP3 player. In another embodiment, the device provides an electronic and transducer device that can be attached, adhered, or otherwise embedded into or upon a removable oral appliance or other oral device to form a DAP. Such an oral appliance may be a custom-made device fabricated from a thermal forming process utilizing a replicate model of a dental structure obtained by conventional dental impression methods. The electronic and transducer assembly may receive incoming sounds either directly or through a receiver to process and amplify the signals and transmit the processed sounds via a vibrating transducer element coupled to a tooth or other bone structure, such as the maxillary, mandibular, or palatine bone structure.

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: 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 vibration speaker with facial plate has developed for delivering sound in a form of vibrational movement to a user's skin. The vibration speaker includes a voice coil to generate a magnetic force in response to application of a sound signal from an exterior, a magnet having a predetermined magnetic force to interact with the magnetic force from the voice coil, a basket to receive the magnet, a face plate to deliver upward and downward movement of the voice coil or the magnet to the user's skin, and a rear cover coupled to the face plate to constitute an appearance of the vibration speaker. The face plate is provided with a plate-shaped tensioner providing a predetermined tension for maintaining the face plate in a horizontal state to control upward and downward vibrational movement delivered from the vibration speaker.

Abstract: A bone conduction assembly can include at least a microphone, an assembly stem, an ear cushion, and a microphone channel. The microphone can include an acoustic-to-electric transducer. The assembly stem can house the microphone and can be shaped for insertion into an ear canal of a user. The ear cushion can have an inner surface surrounding an outer surface of the assembly stem and an outer, contiguous, annular surface configured to maintain contact with an ear canal of a user when worn. The microphone channel can be shaped to channel vibrations resulting from bone conduction from the ear canal through the assembly stem to the microphone. In one embodiment, the bone conduction assembly can include a speaker having a speaker channel that is acoustically isolated from the microphone channel.

Abstract: The present invention relates to a sound transmission system using a human body as a propagation medium. The transmission system includes a first signal transmitter and a second signal transmitter respectively generating signals having frequencies corresponding to each other, the first and second signal transmitters being coupled to the human body, wherein the first and second signal transmitters respectively generate high frequency signals having an opposite phase to each other, and the respective signal transmitters combine the audio signals and the high frequency signals to transmit the combined signals to the human body. The respective signal transmitters combine the generated audio signals and high frequency signals, adjust an output phase of the combined signals, and transmit the combined signals through the human body.

Abstract: A communication apparatus includes a support structure (41) that is fastenable to a safety helmet (58). A vibration conduction microphone (54) is carried by the support structure. The vibration conduction microphone and the speaker enclosure (43) are positioned so that, when the support structure is fastened to the safety helmet, the vibration conduction microphone and the speaker enclosure come into contact with a rear of the wearer's head.

Abstract: An electronic hearing device embedded thereinto a molded denture placed therein a user's mouth and fastened thereto the user's teeth allowing said teeth and related facial bone structure to conduct sounds received by said hearing device thereto the bones of the middle ear and subsequently to the brain for conversion into understandable language and sounds is herein disclosed. The hearing device may be used in conjunction with traditional ear-mounted hearing aids. The hearing device comprises expected electronic components such as an inout transducer, output transducers, a battery, a volume control, wires, and the like components fastened thereto or embedded thereinto a custom molded orthodontic appliance or normal denture plate and fastened to rear upper molars. The invention allows the user to turn the hearing device on and off or to adjust volume using their tongue.

Abstract: A bone conduction device for enhancing the hearing of a recipient, comprising: a sound input element configured to receive an acoustic sound signal; an electronics module configured generate an electrical signal representing the acoustic sound signal; a transducer configured to generate mechanical forces representing the electrical signal for deliver to the recipient's skull; and dual percutaneous anchors coupled to the transducer and configured to receive and transmit the mechanical forces.

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: Methods and apparatus for transmitting vibrations via an electronic and/or transducer assembly through a dental patch are disclosed herein. The patch assembly may be attached, adhered, or otherwise embedded intra-orally on a tooth or oral tissue. The electronic and transducer assembly may receive incoming sounds either directly or through a receiver to process and amplify the signals and transmit the processed sounds via a vibrating transducer element coupled to a tooth or other bone structure, such as the maxillary, mandibular, or palatine bone structure.

Abstract: A communication headset is disclosed. The headset comprises two earpieces: a first earpiece, having a first arm, positionable in front of a wearer's ear and a second arm, positionable behind a wearer's ear, with a first bone conduction speaker carried on the second arm; and a second earpiece, having a first arm, positionable in front of a wearer's ear and a second arm, positionable behind a wearer's other ear, with a second bone conduction speaker carried on the second arm. A first microphone is carried on the first earpiece, and is adapted to detect ambient sound from at least a first direction. A second microphone is carried on the second earpiece, and is adapted to detect ambient sound from at least a second direction.

Abstract: [Problems] To convert a signal of non-audible murmur obtained through an in-vivo conduction microphone into a signal of a speech that is recognizable for (hardly misrecognized by) a receiving person with maximum accuracy.

Abstract: The present invention relates to a vibration earphone that improves the efficiency of sound output from the earphone by outputting vibrations for the high sound frequency range through a mastoid and by simultaneously outputting vibrations for the low frequency range through a cylindrical low sound transmitting member. The vibration earphone comprises a vibration member for outputting sound through vibrations and including a face plate, a voice coil, a basket with a magnet coupled thereto, and a cover; the low sound transmitting member housing the vibration member therein, for outputting vibrations for low sound through an external wall inside an ear; and a mastoid for outputting vibrations for the high sound frequency range generated from the face plate through a projection passing through the low sound transmitting member and inserted in and coupled to a hole defined in a central portion of the face plate of the vibration member.

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 earphone set includes a main device having a digital signal processor, and an earplug has an external microphone and a speaker electrically connected with the digital signal processor respectively. The external microphone converts an external sound wave into an electronic signal and transmits the electronic signal to the digital signal processor for processing. The speaker converts the electronic signal processed by the digital signal processor into a sound wave for output.

Abstract: A method and an arrangement for damping the resonance frequency in a vibrator for bone anchored hearing aids in which sound information is mechanically transmitted via the skull bone directly to the inner ear of a person with impaired hearing. A microphone picks up the sound, a signal processor amplifies and filters the signal from the microphone and a vibrator converts the electrical signal into vibrations. The signal processor of the hearing aid is used for damping the resonance frequency peak of the vibrator. For this purpose the signal processor includes electronic filters that are arranged to reduce the amplification in the signal processing chain of the hearing aid as much as the desired dampening of the resonance frequency peak of the vibrator.

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: 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 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 uses commercially available 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 ring transducer comprising an outer metal ring and an inner ceramic ring provides a device for the conduction of ultrasonic signals directly in the ear canal, thereby providing an efficient means for the conduction of such signals. In an alternate embodiment, stacks of piezoelectric film, optionally shaped into a ring, may be used for placement in the ear or outside the ear, such as on the ends of eyeglasses.

Abstract: A bone conduction earphone in which a large magnetic force can be generated and which can achieve improvement of sound quality and reduction of power consumption is provided. A vibration part 3 is provided to include a first magnet 32 and a second magnet 34, which coaxially secure a voice coil 2 on an inner surface 12a of an upper wall 12 of a cylinder-shaped frame 10 having an open lower part and are located in an inner side region and an outer side region of the voice coil 2, and a diaphragm 36 which connects the first magnet 32 and the second magnet 34 to the frame 10. A vibration transmission cushion 5 is provided to a lower part of the frame 10 in order to transmit a vibration of the voice coil 2 and the vibration part 3 to a human body.

Abstract: In an acoustic vibration generating element, a piezoelectric bimorph element or unimorph element is covered with a covering member of a flexible material at least on two surfaces perpendicular to a thickness direction. The covering member may be provided with a plurality of V-shaped grooves so as to improve a generated vibrating force. Alternatively, the covering member may be provided with an air chamber in the vicinity of a surface of one side so as to prevent sound leakage. Further, the covering member and an earhook may be integrally formed by the flexible material so as to achieve a light-weight acoustic vibration generating element suitable for a bone conduction speaker.

Abstract: Disclosed is an earphone set using both bone conduction and air conduction. The earphone set includes: a dual earphone which allows a user to selectively hear sounds from the front or rear side of the earphone set; a case cover provided at an end of the dual earphone; a cylindrical reinforcing frame assembled on one side of the case cover; a finishing ring mounted on the outer peripheral surface of the cylindrical reinforcing frame; a top cover assembled on one side of the cylindrical reinforcing frame and the finishing ring and having an extension projection at one side thereof; a rubber ear cap assembled at a front end of the extension projection to be inserted into an ear hole of a user; and a bone conduction vibrator provided inside the dual earphone.

Abstract: An amplitude modulator circuit includes a reference oscillator and an envelope modulator coupled to the reference oscillator for receiving a reference signal. A microcontroller is coupled to the envelope modulator for providing an envelope signal to the envelope modulator and a low pass filter is coupled to the envelope modulator for receiving a modulated command from the envelope modulator. An inverter is coupled to the low pass filter for receiving a low passed envelope modulated signal from the low pass filter and a transducer or amplifier is coupled to the inverter and the low pass filter for receiving an inverted low passed signal and the low passed envelope modulated signal.

Abstract: Intra-oral tissue conduction microphone apparatus and methods are described for internal, but non-surgically installed microphones located in the oral cavity. An intra-oral tissue conduction microphone may be attached, adhered or integrated with a removable dental appliance which is positioned against the inside surfaces of the cheek, palate or gingiva. The sensor serves as a component in a non-observable hearing, body sound monitoring or communications device that can operate in environments incompatible with most existing devices. Generally, a piezoelectric film serves as the sensor that is well matched to tissue and which directly converts to an electrical signal by the piezoelectric effect signals which are received through the oral mucosa, gingiva or palate.

Abstract: A sound system, the sound system including: (a) a signal processor that is adapted to generate a first sound signal and a second sound signal, to provide the first sound signal to a loudspeaker; and to provide the second sound signal to a bone conduction speaker; and (b) the bone conduction speaker that is adapted to transduce the second signal to a bone conductible sound signal that is carried in a bone of a user.

Abstract: An earpiece for providing an audio signal to two ears of a user, includes an audio interface for providing the audio signal, a bone conduction speaker coupled to the audio interface for outputting an output signal, an adaptive filter with an adjustable impulse response to provide a filtered signal that once played to the second ear of a user, by an in-ear speaker, reduces an audio effect of the leakage signal on the second ear of the user, an in-ear speaker coupled to the audio interface for providing an in-ear audio signal to the second ear of the user, in response to the filtered signal and the second input signal, an in-ear microphone for sensing a sensed audio signal, and a processor for updating an impulse response of the adaptive filter in order to reduce a contribution of the leakage signal to the sensed audio signal.

Abstract: A portable terminal apparatus where a talking can be speedily switched to that using a bone conduction speaker even in the talking. In this device, an upper housing (101) has a cutout section (106) for clearing a step section (103). Installation sections (107) are arranged so as to set the cutout section (106) between them and are combined with a hinge provided in the step section (103). The upper housing (101) can be pivoted and folded relative to a lower housing (102). The lower housing (102) has a keypad (110) and also has the step section (103) formed higher by one step than a panel surface (112) of the lower housing (102). The step section (103) receives a bone conduction speaker (104) and has at its top section a vibration surface (105).

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.

Abstract: The hearing aid according to the invention comprise: a skin penetrating abutment, a skin penetrating abutment, a rod with a coupling part, operative to allow releasable connection between the rod and the abutment, a hearing aid housing with an opening, where the rod extends through the opening and into the hearing aid housing, a vibrator connected to the rod in the hearing aid housing, and resiliently mounted between a distal housing wall part which faces away from the opening and a proximal housing wall part which comprises the opening, whereby the proximal wall part further comprise a relief portion which extends into the area between the vibrator and the coupling part of the rod and where, the distance between the relief portion and the coupling part of the rod is smaller than the distance between the vibrator and the inside of the distal wall part.

Abstract: A bone conduction device configured to couple to an abutment of an anchor system anchored to a recipient's skull. The bone conduction device includes a housing and a vibrating actuator movably suspended in the housing and configured to vibrate in response to sound signals received by the bone conduction device The bone conduction device further includes a coupling apparatus configured to attach the bone conduction device to the abutment so as to deliver to the recipient's skull vibrations generated by the vibrating actuator, and a travel limit apparatus configured to limit a range of travel of the housing relative to the coupling apparatus.

Abstract: A flexible band may be worn around the stomach of a pregnant woman. The band may have speakers safely and comfortably integrated therein to provide sound to prenatal babies. The speakers may connect to a mp3 player that may be stored in a pocket in the band.

Abstract: A tactile sound speaker transmits sound-generated vibrations to a user through a touchpad to provide a tactile sound experience. The tactile sound speaker can include a speaker driver, a speaker cone, and a touchpad. The touchpad can be coupled to the speaker cone by transmission shafts that transmit vibrations generated by the speaker driver's output. A user may experience tactile sound by contacting the touchpad with a hand, foot, or other body part while listening to music or other sound.

Abstract: An electronic and transducer device can be attached, adhered, or otherwise embedded into or upon a removable oral appliance or other oral device to form a two-way communication assembly. The device contains a motion sensor to detect external forces imposed on the user such as an explosion, for example. The information is stored for medical treatment, among others. In another embodiment, the device provides an electronic and transducer device that can be attached, adhered, or otherwise embedded into or upon a removable oral appliance or other oral device to form a medical tag containing patient identifiable information. Such an oral appliance may be a custom-made device fabricated from a thermal forming process utilizing a replicate model of a dental structure obtained by conventional dental impression methods.

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 present invention relates generally to the design and optimal placement of transmitting and receiving directional antennas, a priori, as used in intra-oral to extra-oral (or visa versa) wireless electronic systems regardless of the type and purpose of the data transmitted between the antennas (intra-oral and extra-oral). Systems related to the invention transmit data via electromagnetic radio waves or through an inductive loop coupling such as in stimulating the human hearing nerve (inner ear) via dental bone conduction pathway when operating in “receive mode”. “Send mode” systems related to the invention transmit non-acoustic information or voice data from inside the mouth to a receiver located outside the mouth.

Abstract: A provided a human body sound transmission apparatus includes: a processing unit processing an audio signal of an audio frequency band including data desired to be transmitted, an audio high frequency signal obtained by combining the audio signal and a first high frequency signal, and a second high frequency signal; and a transmission unit receiving a signal obtained by combining the audio high frequency signal and the second high frequency signal from the processing unit and transmitting the received signal by using a human body as a medium, wherein the audio high frequency signal and the second high frequency signal are combined to be transmitted by using the single transmission unit.

Abstract: The object is to provide a bone conduction device and its tympanum, wherein the bone conduction device can be efficiently mounted without generating a dead space in a case having a limited installation space such as a cellular phone's case having a large display screen. A magnetic sound converter device has an outer magnetic structure wherein a voice coil (3) is mounted on a center magnetic pole (2) of a yoke (1) and a magnet (4) is arranged on the outer side of the voice coil (3). The yoke (1) and the center magnetic pole (2) thereof are vertically long, the magnet (4) is arranged on the short side edge parts on the both sides of the yoke, and a tympanum fixing part (6) is arranged on the outer side of each magnet (4) on a magnet arrangement axis.

Abstract: A meter device includes an indicator unit, movably supported within a predetermined range, for representing an amplitude value of an input signal by a movement amount ?? from a reference position ?0 which is one end of the predetermined range. A gain acquiring unit acquire a gain of the input signal; and a maximum movement amount determining part determines a maximum movement amount ??M of the indicator unit at the gain based on the gain acquired by the gain acquiring unit. A drive control unit moves the indicator unit to a position corresponding to the amplitude value of the input signal between the reference position ?0 and a maximum movement position ?M moved from the reference position ?0 by the maximum movement amount ??M based on the maximum movement amount ??M determined by the maximum movement amount determining part and the amplitude value of the input signal.

Abstract: Disclosed is an earset assembly that has a housing having a microphone port and a speaker port. A microphone is enclosed by the housing and has first and second input ports. The first input port is acoustically coupled to the microphone port to detect air pressure changes of the ear of a user. A speaker is enclosed by the housing and has an output port acoustically coupled to the speaker port to broadcast sounds to the user. The output port is acoustically coupled to the second input port of the microphone so that the microphone cancels at least a portion of feedback from the sounds broadcast by the speaker and detected at the first input port of the microphone.

Abstract: It is an object of the invention to provide a headset for performing simultaneous two-way communication or alternate two-way communication, which has excellent sound insulating properties such that external noise is not possibly mixed even when used under high noise conditions. A pair of bowl-shaped housings 1 each having an annular pad 2 attached to the rim of an opening portion are connected together through a headband 3, an acoustic speaker 5 supported by a buffer material 4 is arranged in at least one of the housings 1, and a bone conduction microphone 6 supported by the buffer material 4 such that the distal end is brought into abutment against the ear or the portion around the ear when a user wears the headset is arranged in at least one of the housings 1.

Abstract: Stuttering treatment methods and apparatus which utilize removable oral-based appliances having actuators which are attached, adhered, or otherwise embedded into or upon a dental or oral appliance are described. Such oral appliances may receive the user's voice and process the voice to introduce a time delay and/or a frequency shift. The altered audio feedback signal is then transmitted back to the user through a tooth, teeth, or other bone via a vibrating actuator element. The actuator element may utilize electromagnetic or piezoelectric actuator mechanisms and may be positioned directly along the dentition or along an oral appliance housing in various configurations.

Abstract: The present invention provides a sensory signal output apparatus, which is constructed such that several frequencies of output can be realized. The sensory signal output apparatus includes a coil (15), to which an alternating signal is transmitted, a magnetic circuit (11) including a magnet (1 Ia), a top plate (1 Ib) and a yoke (1 Ic) to form an opening such that magnetic flux linkage perpendicular to the coil is induced, and a casing (1) receiving the magnetic circuit therein. The sensory signal output apparatus further includes a first vibration unit (10a) having the magnetic circuit, which responds to a magnetic field depending on a direction of the input signal, thus vibrating, and a first vibrating screen (13) adhered or welded to a ring-shaped protrusion of the yoke, thus generating a sensory signal.