Class 381/344 - Mouthpiece

Subclass of Class 381 - Electrical audio signal processing systems and devices
Definition: Subject matter wherein the modifying element is designed
No. of patents: 29
Last issue date: 01/10/2012

Number	Title	Issue Date
8094854	Loudspeaker A loudspeaker comprises a horn waveguide having a waveguide surface, and a transducer located in, or adjacent to, a throat of the horn waveguide. The transducer has a substantially rigid convex dome-shaped acoustically radiating surface. A horn angle subtended betwe...	01/10/2012
6072887	Receiver-transmitter of communication equipment A receiver-transmitter for communication equipment is composed of a yoke iron, a magnet and a magnetic pole piece. The yoke iron has a recess in which the magnet and the magnetic pole piece are located. The recess is provided in the bottom thereof with a ...	06/06/2000
6038327	Electroacoustic transducer comprising a closing member for closing the rear volume of the transducer In an electroacoustic transducer (1) having a diaphragm (17) and a voice coil (16) connected to the diaphragm (17) in the area of the rear volume (HV) and cooperating with a magnet system (9), and including a substantially annular closing member (30) for ...	03/14/2000
5905803	Flush-porting method and device for reduction of wind-induced noise in a microphone The present invention provides a method (600) and device (400) for minimizing wind-induced noise in a microphone. The device includes: a housing (412) having a recessed area shaped to accommodate a microphone transducer (410); the microphone transducer (4...	05/18/1999
5890072	Radiotelephone having a non-resonant wave guide acoustically coupled to a microphone A radiotelephone having an acoustical wave guide for channeling and directing sound energy into a microphone forming a part of the radiotelephone. The wave guide includes an elongated tube structure that varies in cross-sectional area from an inlet end to...	03/30/1999
5802198	Hermetically sealed condenser microphone A hermetically sealed condenser microphone including an outer sealing diaphragm hermetically sealing an electroacoustic transducer within a case from the outside environment. The sealing diaphragm passes sound undiminished through an underlying intervenin...	09/01/1998
5719935	Cellular telephone A cellular telephone having a telephone receiver of an improved structure suitable to effectively exclude noise in noisy places thereby allowing a user to clearly hear the voice of a speaker is disclosed. The telephone receiver of this cellular telephone ...	02/17/1998
5701354	Telephone mouthpiece for preventing wind noises and method for reducing wind noises input thereto The telephone mouthpiece of the present invention comprises a microphone unit 3, a unit housing section 1 and an acoustic duct section 2 tightly fitted to the unit housing section 1. The unit housing section 1 comprises a flat plate 11 and a cylindrical h...	12/23/1997
5574794	Microphone assembly for adhesive attachment to a vibratory surface A microphone assembly suitable for use with a face mask has a cylindrical housing with an inwardly extending recess at its front end covered by a first diaphragm. A microphone unit carried by the housing has a diaphragm communicating with the recess, and ...	11/12/1996
5428688	Voice transmission system with remote microphone A voice transmission system for a conventional gas mask or face mask includes an amplifier body and a remote microphone assembly. The amplifier body encloses an amplifier electronic components assembly, a speaker and one or more batteries, and is designed...	06/27/1995
5371804	Voice transmission system A voice transmission system for a conventional gas mask or face mask includes a body enclosing a microphone, an amplifier assembly and a speaker. The microphone is mounted within a cavity formed in the body, while the amplifier assembly and speaker are mo...	12/06/1994
5339364	Device for conversion between electrical oscillations and acoustic waves A device for the conversion of electrical oscillations into acoustic waves or the conversion of acoustic waves into electrical oscillations, including an electro-acoustic converter and a housing with two housing shells (1, 2) in the form of plastic moldin...	08/16/1994
5231659	Telephone handset with transducer assembly The telephone handset is provided with at least one piezoelectric transducer (6, 7). The transducer is received in a housing part (2) which includes fixing means for the transducer and its electrical connection means. The housing part is assembled with at...	07/27/1993
5159641	Microphone circuit control mechanism for breathing apparatus A microphone circuit control mechanism which is utilized to control the output of a microphone (20) disposed in a breathing mask (12) the microphone circuit extending to a communications device (22) and wherein the microphone circuit control mechanism inc...	10/27/1992
5144656	Transmitter for communication equipment A transmitter for communication equipment, including a casing with a speaker piece. The speaker piece is provided with a plurality of outer microphone through holes. An air chamber housing is arranged on an inner surface of the speaker piece and includes ...	09/01/1992
5138666	Voice transmission system The invention provides a combined microphone and amplifier assembly that is releasably connected to the voice emitter passage of a conventional face mask without requiring any penetration or structural modification of the face mask including the voice emi...	08/11/1992
4920564	Moisture barrier assembly A microphone unit for a telephone handset comprises a microphone mount, a microphone mounted in the microphone mount, a mouthpiece detachably fixed to the handset, and a moisture barrier assembly for preventing ingress of moisture into the microphone. The...	04/24/1990
4901356	Voice transmission system A voice transmission system for a face mask includes a microphone assembly partially received in and threadedly connected to an emitter passage through the mask to position a microphone on the inside of the mask. An amplifier assembly is threaded onto the...	02/13/1990
4852682	Underwater voice communicator An underwater communicator comprising a transmitter for transmitting acoustical energy between mediums having differing impedance. The transmitter includes first and second ends. The first end is exposed to a first medium while the second end is exposed t...	08/01/1989
4803724	Hand set This invention is concerned with arrangement for fitting a sender onto a hand set. The hand set of the invention enables a float set type sender to be set onto a hand set case by using a holder which is designed to set a pressure contact set type sender a...	02/07/1989
4799263	Speaking and hearing system for breathing apparatus A speaking and hearing system for respirators, where the apparatus wearer is connected to a respiratory gas supply independent of the ambient air. A suppression, independent of acoustic signals, of the breathing noises of the apparatus wearer is provided ...	01/17/1989
4796288	Telephone handset with static discharge prevention A telephone handset with static discharge prevention has a dielectric membrane extending over the metal ferrule of the transmitter, the membrane spaced from the ferrule by an annular dielectric spacer. At the receiver, a metal shunt on the front of the re...	01/03/1989
4752961	Microphone arrangement A microphone arrangement, suitable for a telephone handset, comprises an array of microphone transducers, conveniently pressure transducers arranged at the vertices of a cube. Signal processing circuitry derives from the transducer outputs signals represe...	06/21/1988
4617431	Voice tube assemblies for post-auricle headsets A new voice tube assembly for post-auricle headsets is disclosed. In one aspect of the invention, first and second curved, rigid tubular sections are employed to connect a flexible main voice tube section with the top of a post-auricle capsule containing ...	10/14/1986
4594478	Transmitter assembly for a telephone handset A transmitter assembly for a telephone set uses a commercially available cartridge electric transmitter, by modifying the response curve. This is obtained by an adapter housing the transmitter with a first volume defined between the end of the transmitter...	06/10/1986
4424419	Electret microphone shield An electret microphone has a metal shield around it in order to guard against electromagnetic interference. Acoustic waves reach the electret element through a passage in the shield. The electret response is undesirably affected by an electric field produ...	01/03/1984
4263484	Microphone unit A telephone transmitter in which a cavity is formed in front of a vibrating membrane of the microphone transmitter to thereby reduce wind-noise. The cross-sectional area and volume of the cavity are larger respectively than the cumulative total cross-sect...	04/21/1981
4123622	Protective cover for sound transducers located in face masks of divers A moisture protective housing for a sound transducer located inside the face mask of a diver which face mask is vented to a breathing apparatus, such as a scuba tank with regulator, to maintain the air breathed by the diver at substantially the same press...	10/31/1978
4072831	Voice transmitting apparatus for a breathing mask An apparatus for transmitting the wearer's voice is mounted inside a breathing mask and includes a microphone and a protective sheath substantially encasing the microphone. The protective sheath includes a thin, pliable wall which is kept in contact with ...	02/07/1978

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Class 381/344 - Mouthpiece