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9031266 Electrostatic loudspeaker with membrane performing out-of-plane displacement  
An electrostatic loudspeaker comprises a membrane structure and an electrode structure. The membrane structure comprises a central membrane portion and a circumferential membrane portion. The...
8958577 System, method, and apparatus for adjusting an output of a transducer  
A system and method for modulating the sound pressure that is output from an audio transducer is disclosed. In one embodiment, the method includes receiving an audio signal and placing the audio...
8953821 Parametric audio system  
A parametric audio system having increased bandwidth for generating airborne audio signals with reduced distortion. The parametric audio system includes a modulator for modulating an ultrasonic...
8897465 Class D micro-speaker  
A micro-speaker. The micro-speaker includes a first plate, a second plate, and a diaphragm. The first plate is biased to a first voltage. The second plate is biased to a second voltage. The...
8831248 Apparatus with directivity pattern  
A loudspeaker is described. The loudspeaker includes two or more segmentations of a planar radiator. Each of the segmentations has an associated frequency dependent velocity magnitude and phase...
8831243 Method of and circuit for adjusting frequency of a driving signal of electronic horn by means of capacitor  
The present invention discloses a driving circuit for electronic horn and a driving method for the electronic horn. The driving circuit includes an oscillating circuit, which generates a signal...
8769803 Speaker manufacturing method  
Provided is a method of manufacturing a loudspeaker including assembling a magnetic circuit and a frame. In the step of assembling the magnetic circuit and the frame, parallelism between a plate...
8755539 Electrostatic transducer loudspeaker  
An electrostatic transducer loudspeaker includes a filterless class-D amplifier to modulate an audio input signal to generate a modulated signal containing a PWM switching carrier component, and a...
8693708 System for operating a device for producing an audible alarm  
A backup alarm for producing an audible warning signal which warbles or beeps, at selected audible output power (Db) levels includes a computer which drives a speaker by switching drive voltage to...
8590136 Method of fabricating a dual single-crystal backplate microphone  
A dual backplate MEMS microphone system including a flexible diaphragm sandwiched between two single-crystal silicon backplates may be formed by fabricating each backplate in a separate wafer, and...
8588438 Driving interface device adaptive to a flat speaker  
A driving interface device adaptive to a flat speaker is introduced herein. The driving interface device is coupled with an external sound source for receiving sound signals, and boosts voltage...
8503693 Biology-inspired miniature system and method for sensing and localizing acoustic signals  
A system and method for sensing acoustic sounds is provided having at least one directional sensor, each directional sensor including at least two compliant membranes for moving in reaction to an...
8379888 Flexible piezoelectric sound-generating devices  
A sound-generating device comprises a first enclosure having at least one first electrode and a first piezoelectric layer, a first terminal of an audio signal output being coupled to the at least...
8379882 Method and electronic device for driving a capacitance electro-acoustic transducer  
An electronic device includes a capacitance electro-acoustic transducer and an audio driver. The audio driver is coupled to the capacitance electro-acoustic transducer. The audio driver includes a...
8369546 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...
8327521 Method for production and using a capacitive micro-machined ultrasonic transducer  
Methods are provided for production of pre-collapsed capacitive micro-machined ultrasonic transducers (cMUTs). Methods disclosed generally include the steps of obtaining a nearly completed...
8306244 Digital speaker driving apparatus  
A digital sound system suitable for a digital speaker device for directly converting analog sound by a circuit using a ΔΣ modulator and a mismatch shaping filter circuit to output a plurality of...
8284964 Compound membrane, method of manufacturing the same, and acoustic device  
A compound membrane (100) for an acoustic device (200), the compound membrane (100) comprising a first layer (101) and a second layer (102), wherein a value of Young's modulus of the second layer...
8238580 Module having a remote turn-on function for use with a powered subwoofer/speaker or other audio/visual electrical equipment  
The present invention provides a module for a powered speaker, such as a subwoofer that may be actuated to turn the speaker on and off remotely by energizing the auxiliary AC power supply provided...
8238581 Powered subwoofer/speaker remote turn-on function  
The present invention provides a powered speaker, such as a subwoofer that may be turned on and off remotely by energizing the auxiliary AC power supply provided with an audio device or other...
8204260 Speaker apparatus, speaker driving apparatus and control method thereof  
The present invention provides a sound producing apparatus which suppresses an increase in electric power consumption and cost, and an increase in a number of wiring when a plurality of speaker...
8199925 Loudspeaker array audio signal supply apparatus  
A first directivity parameter to provide a narrow directivity and a second directivity parameter to provide a wide directivity are preset for a directivity control apparatus to control the...
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...
8175294 Electrostatic loudspeaker with single ended drive  
An electrostatic loudspeaker includes a front stator, first and second substantially conductive diaphragms, a center stator and a back stator. The front stator is connected to a safe reference...
8150091 Printed circuit board for a flat-panel speaker  
A flat-panel speaker is attached to an exterior surface of a printed circuit board (PCB) housed within a consumer electronic device. Rather than place the flat-panel speaker within a sealed...
8130973 Superdirectional acoustic system and projector  
A superdirectional acoustic system for reproducing a sound signal supplied from a real sound source by using a superdirectional speaker and producing a virtual sound source in a vicinity of a...
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...
8121315 Condenser microphone chip  
Disclosed is a condenser microphone chip, comprising: a substrate (21); a diaphragm (26) spaced from the substrate; a curved beam (27) connected with the diaphragm (26) to anchor the diaphragm...
8103037 System for producing the parameters of a bass-enhanced loudspeaker enclosure  
A system for producing parameters for a bass-enhanced loudspeaker enclosure; meanwhile, a low-frequency extended frequency, a quality and quantity ratio and radius of a port need to be defined for...
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...
8081779 Audio circuit  
An object is to provide an audio circuit in which flow of excessive current through a capacitive speaker and a drive circuit thereof can be prevented while degradation of sound quality of...
8068622 Method and apparatus for controlling a selectable voltage audio power output stage  
A method and apparatus for controlling a selectable voltage audio power output stage provides a mechanism for raising the selected power amplifier output voltage in time for the arrival of signal...
8064620 Driver circuit and driving method for electrostatic loudspeaker  
The present invention discloses a driver circuit for an electrostatic loudspeaker, comprising: a digital modulation encoder for receiving a digital audio signal and a fixed frequency pulse signal,...
8054995 System, method and apparatus for adjusting an output of a transducer  
A system and method for modulating the sound pressure that is output from an audio transducer is disclosed. In one embodiment, the method includes receiving an audio signal and placing the audio...
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...
8027488 Parametric audio system  
Ultrasonic signals are used to transmit sounds from a modulated ultrasonic generator to other locations from which the sounds appear to emanate. In particular, an ultrasonic carrier is modulated...
8023671 Piezoelectric buzzer driving circuit  
A piezoelectric buzzer driving circuit (200) for driving a piezoelectric buzzer (211) with two terminals includes a reverser (216). The reverser includes an output terminal and an input terminal...
8000483 Electrostatic loudspeaker systems and methods  
Embodiments of an electrostatic loudspeaker utilize first and second stators and a diaphragm disposed therebetween, each of the stators and the diaphragm having an electrically conductive portion,...
7953460 Mobile terminal having dual display unit and method of controlling dual speaker and dual microphone thereof  
A mobile terminal having a dual display unit, a dual speaker and a dual microphone, and a method of controlling the dual speaker and the dual microphone thereof are provided. The method of...
7945059 Speaker device, sound reproducing method, and speaker control device  
A speaker device mixes an audible frequency band signal wave with a modulated wave obtained by modulating an ultrasonic frequency band carrier wave with an audible frequency band signal so as to...
7926163 Method of producing an oscillator device  
An oscillator device having an oscillating member, a resilient support and a supporting member is produced. The oscillating member is supported by the resilient support for oscillation about an...
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...
7909466 Project equipped with ultrasonic speaker, and method for displaying sound reproduction range in projector  
A projector includes an ultrasonic speaker, a visual information generation unit that generates visual information relating to a sound reproduction range of the ultrasonic speaker, and an image...
7899197 Electrostatic transducer, driving circuit of capacitive load, method for setting circuit constant, ultrasonic speaker, display device and directional acoustic system  
Provided is an electrostatic transducer which is driven by a boosted driving signal by boosting a modulated signal obtained by modulating a carrier wave with an acoustic signal in an audio...
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...
7716808 Method of attaching a diaphragm to a frame for a planar loudspeaker  
Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces where the diaphragm is secured to a frame. The conductor is connected to a power supply...
7685695 Method of producing a speaker  
A method of producing a speaker which is manufactured by bonding a plurality of speaker components, including steps of humidifying a joint portion which bonds at least two speaker components among...
7685696 Method of manufacturing an electromechanical sensor element  
The invention relates to a method for the manufacture of a sensor element and to a sensor element. In the method, both surfaces of a sensor film are provided with metallic electrodes. The sensor...
7668320 Sound reproduction in portable electronic equipment  
The present invention is directed towards a portable electronic equipment (10) comprising a speaker (16) and a receiver (18), wherein the receiver (18) is damped while the speaker (16) is active...
7630505 Loudspeaker system  
There is provided a low-cost loudspeaker system which can adjust attenuation and provide protection against an excessive input. Between input terminals and a loudspeaker unit is provided a serial...

Matches 1 - 50 out of 123 1 2 3 >