Class 381/176 - Conductive diaphragm (e.g., reed, ribbon)

Subclass of Class 381 - Electrical audio signal processing systems and devices
Definition: Subject matter having an electrically conductive element
No. of patents: 30
Last issue date: 01/31/2012

Number	Title	Issue Date
8107649	Ribbon for ribbon microphone, manufacturing method of the same, and ribbon microphone A ribbon for a ribbon microphone having a magnet forming a magnetic gap, the ribbon which is arranged in the magnetic gap and is vibrated by a sound wave, an electrode for outputting an electric signal which is generated when the ribbon vibrates in the magnetic gap,...	01/31/2012
8031889	Acoustoeletric transformation chip for ribbon microphone An acoustoelectric transformation chip for a ribbon microphone includes a diaphragm that has a vibrating region and two fixing regions disposed on two opposite sides of the vibrating region, and a voice coil film formed on the diaphragm. The voice coil film includes...	10/04/2011
7894619	Acoustic ribbon transducer arrangements A ribbonned microphone assembly, for adjustable sound receiving capabilities, including a transducer having a surrounding flux frame for positioning at least two magnets adjacent a suspended ribbon between the magnets. An array of receiving apertures is arranged in ...	02/22/2011
7430297	Moving ribbon microphone A ribbon microphone includes a diaphragm made of an aluminum foil. To provide a corrosion resistance and a favorable electrical connection in the junction between the aluminum foil and backplates for a long time, a gold deposited film is formed on opposite surfaces ...	09/30/2008
7239712	Inductor-based MEMS microphone An inductor-based integrated MEMS microphone and a method of making the microphone is provided. The microphone structure includes a vibrating inductor that is suspended over another stationary inductor such that the magnetic field induced from one inductor induces a...	07/03/2007
7223136	Condenser microphone and method for manufacturing substrate for the same A substrate is obtained as follows. A structure is formed using a metal plate for a lead frame on which terminals and connection portions are formed; the terminals are exposed from either a front or back surface and the connection portions connect the terminals toge...	05/29/2007
7174024	Flat acoustic conversion device A flat acoustic conversion device includes two magnets disposed so that their magnetic poles face upward arid are adjacent to or in contact with one another, and the magnetic pole faces of different polarities arc disposed alternately; a vibrating member disposed on...	02/06/2007
7152481	Capacitive micromachined acoustic transducer A micromachined capacitive acoustic transducer including an electrode formed by a perforated plate and another electrode formed by a shallowly corrugated membrane anchored at one or more positions on the substrate which also supports the said perforated plate is des...	12/26/2006
7146017	Electrical connectors for electro-dynamic loudspeakers An electro-dynamic loudspeaker is typically provided with a diaphragm mounted to a frame in tension. The diaphragm is provided with a plurality of electrical traces that are disposed within a magnetic field of a plurality of magnets that are mounted to the frame. El...	12/05/2006
7146019	Planar ribbon electro-acoustic transducer with high SPL capability and adjustable dipole/monopole low frequency radiation A planar electro-acoustic transducer has an adjustable back cap option that provides a dipole/monopole radiation that has different roll-off characteristics. The planar electro-acoustic transducer includes a diaphragm and a plurality of front and rear magnetic bars....	12/05/2006
7142688	Single-ended planar-magnetic speaker A planar-magnetic electro-acoustic transducer including a support structure and a magnetic structure carried by the support structure, the magnetic structure comprising a multiplicity of high-energy magnets configured so as to have shared loop field maxima and local...	11/28/2006
7116796	Diaphragm transducer A new type of diaphragm transducer comprising magnets to provide magnetic field strength in a planar region and a planar diaphragm located in the said planar region. The diaphragm has a plurality of conductors on its planar surface for inducing electromagnetic force...	10/03/2006
7106880	Universal ribbon element-module for two or more membrane-widths with optimized flow and drive A loudspeaker module in the form of a ribbon element, where the module can be equipped with a membrane, 50 millimeters in width or narrower, and with any length from 50 millimeters to 2500 millimeters. The magnet system is equipped with so called booster-magnets in ...	09/12/2006
7088837	High efficiency planar magnetic transducer with angled magnet structure An acoustical speaker and planar magnetic transducer therefore wherein the transducer is provided with at least array of spaced magnets which are oriented having their pole faces at an angle with respect to a plane defining a surface of a sound producing diaphragm o...	08/08/2006
7054456	Invertedly driven electrostatic speaker An electrostatic speaker system is provided wherein a multitude of speakers are provided in the system, each speaker having a thin electrically conductive film membrane sandwiched between a pair of stator plates. The film membrane is directly coupled to a high volta...	05/30/2006
6997178	Oxygen inhaler mask with sound pickup device Oxygen breathing masks with a sound pickup device. A microphone capsule of the sound pick-up device is positioned at the base of a mouth-piece whose aperture is placed just before the mask user's mouth. Such a mask may find particular application for aircraft pilots...	02/14/2006
6868166	Chord-like vibration loudspeaker This invention is a loudspeaker that consists of some vibratory membranes and magnets. Every vibratory membrane is a part of a soft conductive tape and is put in a magnetic field. When the membranes conduct audio current, they vibrate air directly with their surface...	03/15/2005
6434252	Ribbon microphone A ribbon microphone having magnets positioned adjacent north and south pole pieces. The magnets are of uniform thickness along their lengths, and do not taper. The pole pieces are substantially the same width as the magnets. An offset ribbon is disposed i...	08/13/2002
6188772	Electrostatic speaker with foam stator An electrostatic speaker device, comprising a first foam stator having an interior surface, and a second foam stator having an interior surface positioned adjacent to the interior surface of the first stator. The interior surfaces of the first and second ...	02/13/2001
6159166	Sensor and method for sensing arterial pulse pressure A method and a pulse pressure sensor for sensing an arterial pulse pressure waveform. In one embodiment, the pulse pressure sensor includes a housing, a diaphragm, a piezoelectric device, and a self-contained amplifier. The skin-contact diaphragm is attac...	12/12/2000
5748758	Acoustic audio transducer with aerogel diaphragm This invention describes an acoustic transducer, either speaker or microphone, that uses an aerogel diaphragm or an aerogel acoustic interface made of magnetic aerogel or conductive aerogel or both. In the case of a speaker, the aerogel diaphragm is direc...	05/05/1998
5097515	Electret condenser microphone An electret condenser microphone includes a cup-shaped metallic case having an apertured end wall, a tubular metal ring received in the metallic case, a vibratory diaphragm having on its one surface a deposited metal film and bonded to an end face of the ...	03/17/1992
5003609	Whole-surface driven speaker A whole-surface driven speaker includes first and second support plates having sound-passing perforations and groups of magnets mounted on the plates. The plates are substantially parallel to each other. A diaphragm is disposed in between the plates. A pl...	03/26/1991
4763030	Magnetomechanical energy conversion A metallic glass ribbon of the formula wherein and is annealed to remove mechanical strains and exposed to a magnetic field in the plane of the ribbon and transverse to the long axis of the ribbon. The resulting metalic glass ribbons have very large magnetic c...	08/09/1988
4544806	Ribbon-type transducer with a multi-layer diaphragm A ribbon-type electro-acoustic transducer comprising a magnet system having a pole plate (2, 3) and a center pole (1) between which at least one air gap (8) is formed with a diaphragm (7) arranged in the air gap (8). The diaphragm comprises at least two f...	10/01/1985
4492825	Electroacoustic transducer A transducer embodying the present invention is assembled on a discrete electrically conductive frame (100) that has been formed to provide both leads (120-140) and a backplate (110). An integrated circuit chip (200) is bonded to one of the leads, and a d...	01/08/1985
4484037	Ribbon-type electro-acoustic transducer with low distortion and improved sensitivity A ribbon-type electro-acoustic transducer has a magnet system which comprises an upper plate (2, 3) and a center pole (1) between which an air gap (8) is formed. A diaphragm (7) on which conductors (9) are arranged is disposed in the air gap. The upper pl...	11/20/1984
4410769	Transducer with adjustable armature yoke and method of adjustment An electromechanical magnetic transducer with a moving armature that is adjustable relative to the working gap. The armature comprises an armature leg, crosspiece, and yoke arms, the adjustment being accomplished by inelastic distortion of the yoke arms. ...	10/18/1983
4151378	Electrostatic microphone with damping to improve omnidirectionality, flatten frequency response, reduce wind noise An electret microphone in which the condenser unit of the microphone is contained within a cylindrical shell open at one end and mounted coaxially on a larger cylindrical casing at the other, the region surrounding the shell and extending to the casing ha...	04/24/1979
4085299	Peak amplitude protection system for ribbon loudspeakers A current limiting capacitor together with a special impedance matching transformer, is inserted between a power amplifier and the input terminals of a ribbon loudspeaker, such transformer having a sharply saturable magnetic core which limits the time int...	04/18/1978

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Class 381/176 - Conductive diaphragm (e.g., reed, ribbon)