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| Number | Title | Issue Date |
| 7881483 | Two-way communications device having a single transducer Embodiments of the invention provide a small and economical two-way communications device that has both an excellent echo-cancellation function that substantially suppresses echoes over the entire frequency range and an excellent voice-operated exchange function tha... | 02/01/2011 |
| 7369671 | Switching structures for hearing aid A hearing aid is provided with a a programmable, signal processing circuit electrically connecting an input system to an output system, a magnetic field sensor, and a selection circuit connected to the magnetic sensor. The selection circuit may be adapted to control... | 05/06/2008 |
| 7352859 | Audio earpiece for wideband telephone handsets A method of manufacturing a telephony earpiece is provided. The method includes providing a speaker diaphragm and constraining the speaker diaphragm using a cap to provide a thin cavity between the cap and the diaphragm. The first resonance peak of the diaphragm/cav... | 04/01/2008 |
| 7317389 | Audio apparatus and monitoring method using the same An audio apparatus includes a converter having a sound-output mode in which the converter functions as a sound-output device for converting a sound signal into an audio output and a sound-pickup mode in which the converter functions as a sound-pickup device for conv... | 01/08/2008 |
| 7317804 | Sound collecting device minimizing electrical noise A sound collecting device is provided which is designed to minimize adverse effects on an output caused by exposure of an electroacoustic transducer to the air. The device includes an electroacoustic transducer and a vibrating circuit. The transducer is exposed to t... | 01/08/2008 |
| 7309944 | Piezoactuator and method for production of the piezoactuator A piezoactuator, includes at least one stacked piezoelement, with at least two electrode layers, arranged one over the other along a stacking direction of the piezoelement, at least one piezoelectric layer, arranged between two of the electrode layers and at least o... | 12/18/2007 |
| 7301764 | Electronic device with audio capability A speaker module is disposed on the top casing and includes at least one first vent. A printed circuit board is disposed between the top casing and the bottom casing and includes at least one second vent corresponding to the first vent. ... | 11/27/2007 |
| 7263373 | Sound-based proximity detector A proximity detector for use in a mobile telephone having at least a microphone and a loudspeaker operatively connected to a signal processor is presented. The proximity detector includes data processing and control modules having a module for controlling the signal... | 08/28/2007 |
| 7248713 | Integrated automatic telephone switch A hearing aid includes a microphone for providing an electrical signal representative of a received acoustic signal, a means for filtering the electrical signal and a means for automatic switching. Upon detecting a presence of a magnetic field, the means for automat... | 07/24/2007 |
| 7245734 | Directional microphone A directional microphone system comprises two membranes that, on the one hand, are respectively acoustically connected via an air volume with one of two spatially separate sound entrance ports, and on the other hand are acoustically coupled with one another via a th... | 07/17/2007 |
| 7233678 | Speaker arrangement for communication terminal A communication terminal includes a housing carrying therein a radio antenna element, a speaker, and a chamber that acts as an electromagnetic resonance cavity for the antenna and as an acoustic resonance cavity for the speaker. The speaker is mounted inside the cha... | 06/19/2007 |
| 7162415 | Ultra-narrow bandwidth voice coding A system of removing excess information from a human speech signal and coding the remaining signal information, transmitting the coded signal, and reconstructing the coded signal. The system uses one or more EM wave sensors and one or more acoustic microphones to de... | 01/09/2007 |
| 7123736 | Double-resonator micro-speaker assemblies and methods for tuning the same Micro-speaker assemblies and mobile terminals including micro-speaker assemblies are provided. The micro-speaker assemblies include a micro-speaker positioned in a housing. A first forward tuning volume is positioned adjacent a front face of the micro-speaker. A pas... | 10/17/2006 |
| 7072479 | Capacitor microphone The present invention relates to a capacitor microphone which is characterized that even in a microphone with a small diameter such as a lavalier microphone, the noneffective electrostatic capacitance enables to be decreased and a better signal-to-noise ratio enable... | 07/04/2006 |
| 7068979 | Mobile telecommunications device A mobile telecommunications device is disclosed and comprises a casing (2), an earpiece (6), and a cover (33) associated with the earpiece (6) to define a resonant cavity (34) between the earpiece (6) and the casing (2 | 06/27/2006 |
| 7058366 | Wireless terminal providing sound pressure level dissipation through channeled porting of sound Apparatus for reducing the sound pressure level (SPL) heard by a user of a mobile terminal, such as a cellular phone, when listening with an ear sealed to the mobile terminal and for providing adequate sound when the ear is not sealed to the mobile terminal. Some so... | 06/06/2006 |
| 7035167 | Seismic sensor A seismic sensor, has a case, a pre-charged, non-conductive membrane located between two plates that form a capacitor and accommodated inside the case, with one of the plates being immovable relative to the case and the other of the plates being movable relative to ... | 04/25/2006 |
| 7027797 | Portable terminal system In a portable terminal system having a portable terminal device and an external speaker 6 for converting electrical signals from the portable terminal device to electrical signals, the portable terminal device 21 and the external speaker portion 19 | 04/11/2006 |
| 7016262 | Seismic sensor A seismic sensor, comprising a case, a pre-charged, non-conductive membrane located between two plates that form a capacitor and accommodated inside the case, with one of the plates being immovable relative to the case and the other of the plates being movable relat... | 03/21/2006 |
| 6975735 | Sound collecting device minimizing electrical noise A sound collecting device is provided which is designed to minimize adverse effects on an output caused by exposure of an electroacoustic transducer to the air. The device includes an electroacoustic transducer and a vibrating circuit. The transducer is exposed to t... | 12/13/2005 |
| 6952672 | Audio source position detection and audio adjustment A method for adjusting an operational characteristic of an audio device can include a series of steps. The method can include receiving a user spoken utterance from an audio speech source and detecting a position of the audio speech source relative to the audio devi... | 10/04/2005 |
| 6907955 | Electromagnetic electroacoustic transducer An electromagnetic electroacoustic transducer, includes: a diaphragm; a magnet; an electromagnetic coil; and a casing for storing the diaphragm, the magnet and the electromagnetic coil therein. The case has at least one first sound emitting hole through which a fron... | 06/21/2005 |
| 6859539 | Vehicle sound synthesizer A sound synthesizer for a vehicle includes a driving operation detector that detects an operation amount of a driving operation input device by a driver. A speed calculator calculates a revolution speed of a drive unit based on the detected operation amount. A sound... | 02/22/2005 |
| 6819939 | Cellular phone with high-quality sound reproduction capability In a cellular phone, stereophonic sound reproduction of music etc. is realized by using a microphone and a speaker of the cellular phone as stereophonic speakers. By the stereophonic sound reproduction function, radio broadcasting from FM stations, streaming sound f... | 11/16/2004 |
| 6798888 | Mount for underwater acoustic projector A mount for acoustic transducers has a resilient sheet with a plurality of mounting apertures therein. Each mounting aperture has an annular groove formed about the inside surface of the sheet to accommodate one of the acoustic transducers. A pair of rigid, acoustic... | 09/28/2004 |
| 6704426 | Loudspeaker system A bandpass loudspeaker enclosure system including at least one electro-acoustic transducer with a vibratable diaphragm having a first acoustical coupling surface and a second acoustical coupling surface, and at least one differential area passive radiator... | 03/09/2004 |
| 6175636 | Electrostatic speaker with moveable diaphragm edges An electrostatic speaker device, comprising a first stator which is substantially acoustically transparent to audio output and a second stator spaced from the first stator at a distance which defines a charge capacitive region between the first and second... | 01/16/2001 |
| 6169811 | Bandpass loudspeaker system A bandpass loudspeaker enclosure system including a first primary enclosure volume, a second primary enclosure volume and a dividing wall positioned between the first and second primary enclosure volumes and having a first opening therein. At least one el... | 01/02/2001 |
| 5790679 | Communications terminal having a single transducer for handset and handsfree receive functionality A wireless terminal for personal communication systems is provided with selective handsfree or handset receive mode of operation utilizing a single transducer. The transducer is mounted within a specially designed enclosure having front and back chambers ... | 08/04/1998 |
| 5568516 | Very low power cordless headset system A cordless headset, requiring very low power using Time Variant Modulation (TVM) for reception of a magnetic signal and TVM of RF or infrared as the transmitter. The headset area or zone of operations is defined by the magnetic field that the headset oper... | 10/22/1996 |
| 5289544 | Method and apparatus for reducing background noise in communication systems and for enhancing binaural hearing systems for the hearing impaired Directional hearing in noisy environments is enhanced using small conventional microphones. In one embodiment a conventional first order bidirectional gradient microphone is employed in connection with a barrier to produce sound shadow at the rearward end... | 02/22/1994 |
| 5282245 | Tubular bi-directional microphone with flared entries A bi-directional noise-cancelling microphone comprising a detector for detecting acoustical signals centrally positioned within a tubular member that has flared entries. The microphone provides a bi-polar response pattern, and effectively cancels unwanted... | 01/25/1994 |
| 5280524 | Bone conductive ear microphone and method An ear piece device configured for being supported in the ear and providing a microphone which is sensitive only to sounds conducted within the skull of the user is contained within a housing which is configured at one end to fit snugly at the ear canal o... | 01/18/1994 |
| 5134659 | Method and apparatus for performing noise cancelling and headphoning A device for performing electroacoustic functions including noise cancellation, communication interface, and headphone functions. The device includes a composite transducer which is connected to a control unit. The composite transducer, which is adapted f... | 07/28/1992 |
| 5033093 | Compact microphone and method of manufacture A microphone has a diaphragm having a dome central portion being formed of laminate of a thin layer of synthetic resinous material and a thin wire mesh contacting the central portion. As surrounding attachment portion is provided so that the diaphragm is ... | 07/16/1991 |
| 4862509 | Portable recording system for telephone conversations A portable system for recording telephone conversations from a telephone and also for recording face-to-face conversations includes a portable, battery-powered audible sound recorder carried by the user, a microphone connected to the recorder, and a micro... | 08/29/1989 |
| 4768614 | Unidirectional enhancer for microphones A hollow enclosure that suspends a bidirectional microphone element within, in such a fashion as to improve the unidirectional characteristics, of said bidirectional microphone.... | 09/06/1988 |
| 4700177 | Sound generating apparatus with sealed air chamber between two sounding plates A sound generating apparatus using piezoelectric elements includes first and second sounding plates arrayed in parallel with each other. The first and second sounding plates respectively include first and second diaphragms, and first and second thin plate... | 10/13/1987 |
| 4593160 | Piezoelectric speaker A piezoelectric speaker comprises a piezoelectric vibrator (1) for vibrating in a bending mode, which is supported at its longitudinal intermediate position by a support member (6), whereby first and second portions (1a, 1b) of the piezoelectric vibrator ... | 06/03/1986 |
| 4504703 | Electro-acoustic transducer An electro-acoustic transducer capable of operating as an emitter and as a pick-up for acoustic waves in an ambient medium includes a cover member having an opening for communication with the ambient medium, first and second diaphragms which are spaced fr... | 03/12/1985 |
