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Match Document Document Title
9036827 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...
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...
9025805 Condenser microphone  
A condenser microphone includes a unit case that supports a condenser microphone unit, has an internal space in communication with a rear acoustic terminal of the microphone unit, and has an...
9025794 Integrated circuit device, voice input device and information processing system  
An integrated circuit device includes a circuit board (1200′), the circuit board including a first diaphragm (714-1) that forms a first microphone, a second diaphragm (714-2) that forms a second...
9014398 Charging circuit and amplifier  
A charging circuit includes a charge pump circuit, an integrating circuit, and a clock signal output circuit. The charge pump circuit generates a boosted voltage by boosting an input voltage at a...
9008332 Processing chip for a digital microphone and related input circuit and a digital microphone  
A processing chip for a digital microphone and related input circuit and a digital microphone are described herein. In one aspect, the input circuit for a processing chip of a digital microphone...
9002037 MEMS structure with adjustable ventilation openings  
A MEMS structure includes a backplate, a membrane, and an adjustable ventilation opening configured to reduce a pressure difference between a first space contacting the membrane and a second space...
8995689 Electronic device circuitry for communicating with accessories  
Electronic devices and accessories such as headsets for electronic devices are provided. A microphone may be included in an accessory to capture sound for an associated electronic device. Buttons...
8983097 Adjustable ventilation openings in MEMS structures  
A MEMS structure and a method for operation a MEMS structure are disclosed. In accordance with an embodiment of the present invention, a MEMS structure comprises a substrate, a backplate, and a...
8983090 MEMS microphone using noise filter  
An MEMS microphone is provided which includes a reference voltage/current generator configured to generate a DC reference voltage and a reference current; a first noise filter configured to remove...
8983093 Electronic device circuitry for communicating with accessories  
Electronic devices and accessories such as headsets for electronic devices are provided. A microphone may be included in an accessory to capture sound for an associated electronic device. Buttons...
8965008 Method for driving a condenser microphone  
A method for driving a condenser microphone is provided. The condenser microphone comprises a membrane and an electrode constituting a capacity. A polarization voltage is applied between the...
8965013 Echo cancellation  
The invention is directed to echo cancellation for a microphone system. An exemplary microphone system comprises a first transistor, wherein a gate terminal of the first transistor is connected to...
8942389 Trim method for CMOS-MEMS microphones  
Systems and methods for adjusting a bias voltage and gain of the microphone to account for variations in a thickness of a gap between a movable membrane and a stationary backplate in a MEMS...
8897464 Condenser microphone  
A condenser microphone includes a condenser microphone unit and a piezoelectric element. The piezoelectric element is disposed so as to generate piezoelectric signals in response to vibration...
8879752 Microphone  
A microphone capable of canceling vibration noise caused by mechanical vibration is provided with, in capsules, a pair of diaphragms and a pair of back plates opposite to the respective...
8873773 Condenser microphone unit and condenser microphone  
A condenser microphone includes multiple condenser microphone units. Each unit includes an impedance converter. The condenser microphone units are connected in series such that outputs of the...
8873777 Variable directivity condenser microphone  
A first diaphragm FD and a second diaphragm RD are respectively arranged across a fixed electrode BP at both sides to constitute the variable directivity condenser microphone. A microphone body 1...
8861740 Automatic computer audio input and output control  
An automatic arrangement for deactivating a computer's speaker or microphone immediately upon the unplugging of an external headphone, speaker or microphone from the computer. Similar principles...
8848947 Low-noise microphone pre-amplifier with active load element  
A low-noise pre-amplifier with an active load element is integrated into a microphone. The microphone has an acoustic sensor coupled to the intrinsic pre-amplifier. A controllable current source...
8831246 MEMS microphone with programmable sensitivity  
A control circuit monitors a signal produced by a MEMS or other capacitor microphone. When a criterion is met, for example when the amplitude of the monitored signal exceeds a threshold or the...
8831247 Phantom power circuit  
A phantom power circuit has a detection circuit and a limiting circuit, the detection circuit detecting a pulse current generated in association with connection or disconnection of a condenser...
8804983 Microphone and microphone apparatus  
A microphone includes a microphone unit having a diaphragm, a fixed electrode and a FET as an impedance converter; a plug outputting audio signals output from the microphone unit; and a jack into...
8787601 Condenser microphone  
A condenser microphone includes a substrate having a cavity, first and second spacers defining an opening, a diaphragm having a rectangular shape positioned inside of the opening, and a plate...
8774428 Very low power MEMS microphone  
A MEMS microphone is capable of operating with less-than-one-volt bias voltage. An exemplary MEMS microphone can operate directly from a power rail (i.e., directly from VDD), i.e., without a...
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...
8767980 Omnidirectional button-style microphone  
A microphone can include a capacitor capsule, an output buffer amplifier connected to the output of the capacitor capsule, and an audio limiter connected to the output of the output buffer...
8744090 Ribbon microphone  
To suppress the transverse displacement of a ribbon due to an impact to a level smaller than that achieved by electromagnetic damping. The switch 150 breaks a path between the piezoelectric...
8737646 Temperature compensated voltage pump  
The present invention relates to an integrated circuit voltage pump with temperature compensation circuitry providing improved DC output voltage accuracy over an operational temperature range. The...
8737663 Acoustic energy transducer  
Illustrative acoustic transducers are provided. A monolithic semiconductor layer defines a plate, two or more flexible extensions and at least a portion of a support structure. Acoustic pressure...
8705775 Capacitive microphone with integrated cavity  
A capacitive microphone and method of fabricating the same are provided. One or more holes can be formed in a first printed circuit board (PCB). A diaphragm can be surface micro-machined onto an...
8705767 Electrostatic speaker system  
The invention relates an electrostatic speaker system comprising—a high voltage switching power amplifier,—an extraction filter having an input coupled to an output of the high voltage switching...
8699726 Apparatus and method for biasing a transducer  
An apparatus comprising a capacitive transducer, for example a MEMS microphone. A first voltage generator is connected to receive a first voltage (VDD*) and generate a second voltage (VCP) for...
8675895 Microphone assembly with integrated self-test circuitry  
The present invention relates to a condenser microphone assembly comprising an electro-acoustic transducer element comprising a diaphragm and a back plate, signal processing circuitry operatively...
8670579 MEMS microphone  
A MEMS microphone includes a cover, a housing engaging with the cover for forming a cavity, at least one transducer accommodated in the cavity, and a conductive case covering the cover and the...
8666095 Fast precision charge pump  
The present invention relates to a condenser microphone assembly comprising a capacitive electro-acoustic transducer element comprising a diaphragm and a back-plate operatively connected to a DC...
8649528 Microphone unit with internal A/D converter  
The present invention relates to a microphone assembly comprising a microphone assembly casing having a sound inlet port and a transducer for receiving acoustic waves through the sound inlet port....
8649534 Audio interface device and method  
The invention provides an audio interface device and method utilizing a single audio jack connector for plugging into a three-wire analog microphone or a three-wire digital microphone, thereby...
8615092 Sound processing device, correcting device, correcting method and recording medium  
A sound processing device includes: a plurality of sound input units; a detecting unit for detecting a frequency component of each sound input to the plurality of sound signal unit, the each sound...
8600080 Methods for communicating with electronic device accessories  
Electronic devices and accessories such as headsets for electronic devices are provided. A microphone may be included in an accessory to capture sound for an associated electronic device. Buttons...
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...
8588433 Electret microphone circuit  
There is disclosed a microphone, a circuit, and a method. A microphone capsule may include an electret microphone and a field effect transistor (FET). A floating DC voltage source may have a first...
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...
8582787 Preamplifier circuit for a microelectromechanical capacitive acoustic transducer  
Described herein is a preamplifier circuit for a capacitive acoustic transducer provided with a MEMS detection structure that generates a capacitive variation as a function of an acoustic signal...
8559643 Stereo microphone unit and stereo microphone  
A stereo capacitor microphone unit includes: two unidirectional microphone units integrally formed with respective fixed electrodes of the unidirectional microphone units facing each other; and an...
8515100 Programmable microphone  
A semiconductor die with an integrated electronic circuit, configured so as to be mounted in a housing with a capacitive transducer e.g. a microphone. A first circuit is configured to receive an...
8509459 Noise cancelling microphone with reduced acoustic leakage  
Systems and methods for a noise canceling microphone and microphone system are disclosed. The system generally includes a housing with a printed circuit board forming a surface of the housing....
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...
8498431 Capacitor microphone  
A capacitor microphone includes: a capacitor microphone unit including a diaphragm that vibrates upon receiving sound waves and a fixed electrode arranged opposite to the diaphragm with a space...
8494173 Integrated circuit with configurable output cell  
An integrated circuit includes at least one output cell including a first output cell having a ground pin connected to a ground rail, a first power supply pin connected to a first power rail, a...

Matches 1 - 50 out of 256 1 2 3 4 5 6 >