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| Number | Title | Issue Date |
| 8184833 | Electrostatic speaker arrangement for a mobile device A speaker is integrally formed with a multi-layered printed circuit board. The printed circuit board includes a flexible membrane layer with a conductive pattern thereon. Positive and negative elements are disposed on opposing sides of the flexible membrane. A drive... | 05/22/2012 |
| 8184832 | Electrostatic loudspeaker capable of dispersing sound both horizontally and vertically An acoustic transducer, specifically an electrostatic loudspeaker (ESL) providing curvature in two directions for improved dispersion of sound waves. The compound curvature also provides a virtual focus of the propagated sound waves for accurate reproduction of musi... | 05/22/2012 |
| 8175302 | Device for and method of generating a vibration source-driving-signal A device (100) for generating a vibration source driving signal (DS) is described, which device (100) comprises an input (101) for receiving an input signal (IS) and an output (102) for providing said driving signal (DS), generating means... | 05/08/2012 |
| 8155356 | Structure and manufacturing method of electrostatic speaker A structure of an electrostatic speaker and a manufacturing method thereof are provided. In the electrostatic speaker, an electrode and a vibrating film are disposed closely, and electrostatic force of the vibrating film may make the vibrating film contacting with t... | 04/10/2012 |
| 8135150 | Electret condensor microphone An electret condenser microphone comprising a metal capsule having a top surface provided with sound receiving holes, a diaphragm, a back electrode plate that faces either one of surfaces of the diaphragm and that is provided separately from the capsule, and an elec... | 03/13/2012 |
| 8126171 | Electrostatic ultrasonic transducer and ultrasonic speaker An electrostatic ultrasonic transducer includes a first electrode that has through-holes, a second electrode that has through-holes, and a vibrating membrane that is disposed such that the through-holes of the first electrode and the through-holes of the second elec... | 02/28/2012 |
| 8111847 | Electret materials, electret speakers, and methods of manufacturing the same A speaker comprises at least one electrode electrically coupled with an audio signal input and a film comprising at least one electret layer. The film is configured to interact with the electrode in response to an audio signal supplied by the audio signal input and ... | 02/07/2012 |
| 8107651 | Speaker structure A speaker structure including a single electret vibrating film structure, a single metal electrode with a plurality of holes and a frame supporting member is provided. In an example, the electret vibrating film structure is formed by an electret film layer, an ultra... | 01/31/2012 |
| 8107652 | Controlled leakage omnidirectional electret condenser microphone element An omnidirectional electret condenser microphone element with improved low frequency background ambient acoustical noise rejection is provided. The omnidirectional electret condenser microphone element includes a plurality of passageways in acoustic series that coup... | 01/31/2012 |
| 8103028 | Electrostatic loudspeaker An electrostatic loudspeaker includes a backplate having a metal film acting as one electrode of a capacitor and defining a number of sound apertures therein; a diaphragm insulatively spaced a distance from the backplate to form the capacitor; the diaphragm comprisi... | 01/24/2012 |
| 8098855 | Flexible electret actuators and methods of manufacturing the same A flexible actuator comprises a thin film and at least one first enclosure with at least one first bendable element coupled to the first enclosure. The thin film may comprise a conductive layer and a first electret layer over a first surface of the conductive layer.... | 01/17/2012 |
| 8094844 | Micro acoustic transducer and manufacturing method therefor A micro acoustic transducer and manufacturing method are provided. Firstly, a substrate having one first and second cavities is provided. Then, a backplate with a plurality of acoustic holes is formed on the substrate, and a diaphragm is formed on the backplate. An ... | 01/10/2012 |
| 8085957 | Method for converting electric signals into acoustic oscillations and an electric gas-kinetic transducer The invention relates to electroacoustic engineering, in particular to methods for converting electric signals into acoustic oscillations and to electroacoustic transducers. The method for converting electric signals into acoustic oscillations comprises exposing an ... | 12/27/2011 |
| 8081784 | Electrostatic electroacoustic transducers An electrostatic electroacoustic device comprising a first electrode configured to receive an audio signal, a first conductive film configured to receive the audio signal, a first electret between the first electrode and the first conductive film, the first electret... | 12/20/2011 |
| 8045735 | Ultrasonic transducer and ultrasonic speaker using the same An ultrasonic transducer includes: a pair of fixed electrodes including a conductive member; a vibrating film having a conductive layer; and a member which holds the pair of fixed electrodes and the vibrating film. The vibrating film is formed of nonconductive bodie... | 10/25/2011 |
| 8041059 | Electrostatic transducer, ultrasonic speaker, driving circuit of capacitive load, method of setting circuit constant, display device, and directional sound system An electrostatic transducer includes: a class-D power amplifier that amplifies an input signal; and a low pass filter that has a plurality of pairs of inductors and capacitors, is connected to an output side of the class-D power amplifier, and serves to eliminate sw... | 10/18/2011 |
| 8031890 | Electroacoustic transducer An electroacoustic transducer serving as a speaker or a microphone is reduced in size and weight and is capable of generating sound with relatively high sound pressure. It is constituted of a housing having a cavity having an opening in the exterior, a fixed electro... | 10/04/2011 |
| 8009846 | Ultrasonic speaker and projector An ultrasonic speaker including: a vibration film having a conductive layer; a pair of fixed electrodes provided oppositely to respective surfaces of the vibration film; and an ultrasonic transducer that causes the vibration film to generate sound waves by applying ... | 08/30/2011 |
| 7995777 | Thin film transparent acoustic transducer A thin film acoustic transducer is formed with an electrically actuatable substantially transparent thin film. Substantially transparent conductive thin films are supported on both sides of the electrically actuatable substantially transparent thin film. The thin fi... | 08/09/2011 |
| 7949143 | Ultrasonic transducer, ultrasonic speaker, acoustic system, and control method of ultrasonic transducer An ultrasonic speaker or acoustic system includes an electrostatic type ultrasonic transducer of a push-pull system is constructed such that a through hole is arranged in the central portion of a fixing electrode of a circular shape. A sound wave reflecting plate is... | 05/24/2011 |
| 7925033 | Electro-acoustic transducer The present invention provides a stable and excellent electro-acoustic transducer having simple constitution with which a vibration pole does not contact with stator poles by a repulsive force acting between the vibration pole and the stator poles and the vibration ... | 04/12/2011 |
| 7889877 | Device for generating a medium stream The invention relates to a device for generating a medium stream, having a chamber, which chamber comprises chamber walls lying opposite one another and at least one medium opening for the medium stream, which medium stream can be generated in the chamber by a diaph... | 02/15/2011 |
| 7804970 | Array interconnect for improved directivity Systems and methods which improve the directivity of a transducer array by reducing electrical cross-talk between conductors connected to individual transducer array elements through the use of a plurality of interconnect circuits are shown. A plurality of signal tr... | 09/28/2010 |
| 7804971 | Electrostatic ultrasonic transducer, ultrasonic speaker and display device The present invention relates to a push-pull type electrostatic ultrasonic transducer, particularly, an electrostatic ultrasonic transducer capable of generating usual sound pressure with lower energy, and thereby, reducing voltage (lowering power); wherein the spac... | 09/28/2010 |
| 7787646 | Surface deformation electroactive polymer transducers The present invention provides electroactive polymer transducers that produce out-of-plane deflections. The transducers form a set of surface features based on deflection of an electroactive polymer. The set of surface features may include elevated polymer surface f... | 08/31/2010 |
| 7769193 | Electrostatic ultrasonic transducer, ultrasonic speaker, audio signal reproduction method, electrode manufacturing method for use in ultrasonic transducer, ultrasonic transducer manufacturing method, superdirective acoustic system, and display device An electrostatic ultrasonic transducer that includes: a first electrode that is formed with a plurality of holes; a second electrode that is formed with a plurality of holes, and is used in pair with the first electrode; an oscillation film formed with a conductor l... | 08/03/2010 |
| 7657044 | Ultrasonic transducer for parametric array An ultrasonic transducer having a reduced cost of manufacture. The ultrasonic transducer includes a first insulative retaining layer, a second insulative retaining layer, and a vibrator film layer sandwiched between the first and second retaining layers. The first r... | 02/02/2010 |
| 7570775 | Microelectromechanical speaker Disclosed is a microelectromechanical (MEM) speaker device. In one embodiment, the MEM speaker device includes: (i) a base layer; (ii) a device controller; (iii) a coil layer connected to magnetic material; (iv) an oscillator connected to a spring and the magnetic m... | 08/04/2009 |
| 7567681 | Surface deformation electroactive polymer transducers The present invention provides electroactive polymer transducers that produce out-of-plane deflections. The transducers form a set of surface features based on deflection of an electroactive polymer. The set of surface features may include elevated polymer surface f... | 07/28/2009 |
| RE40860 | Electrostatic audio loudspeakers An electrostatic transducer, such as a loudspeaker or microphone, comprises a multi-layer panel (1) incorporating an electrically insulating middle layer (2) sandwiched between first and second electrically conducting outer layers (3, 4). At lea... | 07/21/2009 |
| 7564986 | Ultrasonic speaker and projector An ultrasonic speaker including: a vibration film having a conductive layer; a pair of fixed electrodes provided oppositely to respective surfaces of the vibration film; and an ultrasonic transducer that causes the vibration film to generate sound waves by applying ... | 07/21/2009 |
| 7542579 | Ultrasonic transducer, ultrasonic speaker, acoustic system, and control method of ultrasonic transducer An electrostatic type ultrasonic transducer of a push-pull system is constructed such that a through hole is arranged in the central portion of a fixing electrode of a circular shape. A sound wave reflecting plate is arranged on the rear face of the ultrasonic trans... | 06/02/2009 |
| 7436736 | Hydrophone array module A hydrophone array includes hydrophones having an electret means and may have TFT FETs to generate current in response to received longitudinal wave signals. The arrangement may also be used to transmit longitudinal wave signals. Storage capacitors may be coupled to... | 10/14/2008 |
| 7412065 | Acoustic transducer with folded diaphragm One embodiment of a low-profile transducer includes a at least one fin perpendicularly mounted on a planar diaphragm, with a voice coil mounted onto the fin. The voice coil may reside in a strong uniform magnetic field. The locations at which the diaphragm is connec... | 08/12/2008 |
| 7408283 | Micromachined ultrasonic transducer cells having compliant support structure A micromachined ultrasonic transducer array comprising a multiplicity of cMUT cells built on a substrate. Each cMUT cell comprises a compliant support structure built on the substrate, a membrane supported over a cavity by the compliant support structure, a first el... | 08/05/2008 |
| 7386136 | Sound detecting mechanism A sound detecting mechanism is provided which forms a diaphragm with a required thickness by thickness control and yet restrains distortion of the diaphragm to provide high sensitivity. The sound detecting mechanism comprises a pair of electrodes forming a ca... | 06/10/2008 |
| 7376239 | Electromechanical transducer and method for transforming energies An electromechanical transducer comprising at least one transducer element which has a multilayer structure comprising at least two layers such that the transducer element is capable of changing its thickness. The transducer element allows air to flow inside the tra... | 05/20/2008 |
| 7362889 | Elastomeric actuator devices for magnetic resonance imaging The present invention is directed to devices and systems used in magnetic imaging environments that include an actuator device having an elastomeric dielectric film with at least two electrodes, and a frame attached to the actuator device. The frame can have a plura... | 04/22/2008 |
| 7355322 | Ultrasonic transducer, ultrasonic speaker and method of driving and controlling ultrasonic transducer An ultrasonic transducer including: a fixed electrode; a vibrating film placed opposite to a surface of the fixed electrode and having a conducting layer; a member that holds the fixed electrode and vibrating film; the fixed electrode including a driving-use fixed e... | 04/08/2008 |
| 7352873 | Electret-condenser microphone An electret-condenser microphone according to the present invention includes a vibrating diaphragm and a back electrode which compose a condenser; a cylindrical case which houses the vibrating diaphragm and the back electrode; a circuit board which is housed in an o... | 04/01/2008 |
