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| Number | Title | Issue Date |
| 8175293 | Apparatus, methods and computer programs for converting sound waves to electrical signals An apparatus comprising: a first member including a plurality of portions separated from one another by electrical insulator material; a second member configured to form capacitors with the plurality of portions of the first member; and wherein one of the first memb... | 05/08/2012 |
| 8160276 | Audio system and related method integrated with ultrasound communication functionality Audio system and related method integrated with ultrasound communication functionality are provided. A communication transmitting device of proposed invention modulates a communication signal of communication functionality to a high-frequency sound and transmits the... | 04/17/2012 |
| 8150072 | Vibration generator for electronic device having speaker driver and counterweight A vibration generator for a portable electronic device includes a speaker driver and a counterweight retained by a housing to form a closed assembly. When a communications transmission is received by the electronic device, an input force signal is transmitted to the... | 04/03/2012 |
| 8139790 | Integrated circuit biasing a microphone The invention provides an integrated circuit. The integrated circuit receives a first signal from a microphone via a first node. In one embodiment, the integrated circuit comprises a biasing circuit and a buffering circuit. The biasing circuit is coupled between the... | 03/20/2012 |
| 8111843 | Compensation for nonuniform delayed group communications A method for synchronizing audio reproduction in collocated end devices is presented. Each of the devices auto-correlates using noise to determine a threshold prior to the antenna receiving an audio signal. When the devices receive a common audio signal, they provid... | 02/07/2012 |
| 8111844 | Semiconductor integrated circuit and condenser microphone A semiconductor integrated circuit for a condenser microphone according to one exemplary aspect of the present invention includes a first resistor, a second resistor, a power supply terminal, a first capacitor, and a first diode. The first resistor and the second re... | 02/07/2012 |
| 8107644 | Amplifying element and manufacturing method thereof An amplifier integrated circuit element or J-FET is used for impedance conversion and amplification of ECM. The amplifier integrated circuit element has advantages of allowing an appropriate gain to be set by adjusting a circuit constant, and of producing a higher g... | 01/31/2012 |
| 8103022 | Method and system for detecting, and controlling power for, an auxiliary microphone Methods and systems for detecting, and controlling power for, an auxiliary microphone are disclosed. Aspects of one method may include a detection block intermittently enabling a bias circuit block to provide a bias signal to determine if an auxiliary microphone may... | 01/24/2012 |
| 8064619 | Microphone and integrated circuit capible of echo cancellation The invention provides an integrated circuit of a microphone. In one embodiment, the integrated circuit receives a first signal converted from a sound and receives a reference signal with a digital format for echo cancellation. In one embodiment, the integrated circ... | 11/22/2011 |
| 8059836 | Microphone bias circuits A microphone bias circuit is disclosed. A current source provides a first current. A voltage buffer provides a first reference voltage. A microphone coupled between the current source and the first reference voltage receives acoustic waves and converts the received ... | 11/15/2011 |
| 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 with an audio signal and demodulated on passage through the atmosphere.... | 09/27/2011 |
| 8005242 | Alternative sensing circuit for MEMS microphone and sensing method thereof An alternative sensing circuit for a micro-electro-mechanical system (MEMS) microphone and a sensing method thereof are provided. The sensing circuit reads out output signals of an MEMS electret microphone or an MEMS condenser microphone. In considering different op... | 08/23/2011 |
| 8005241 | Mute circuit for a microphone An apparatus having a microphone and a mute circuit (not shown in detail here) operable to be actuated by a rotating door assembly. The apparatus provides a mute circuit suitable to mute the audio microphone when the rotating door assembly is in a closed position an... | 08/23/2011 |
| 7978863 | Apparatus and method to provide advanced microphone bias A circuit includes a differential amplifier having a first input for coupling to a first terminal of a microphone and a second input for coupling to a first terminal of a component having an impedance value that is substantially equal to an impedance value of the mi... | 07/12/2011 |
| 7940942 | Self-identifying microphone A microphone including a connector with a plurality of electrical contacts. The microphone interfaces with a computer system via a digital bus. The microphone can transmit data to the computer system via the connector that is related to at least one of the following... | 05/10/2011 |
| 7929715 | Ultra directional speaker system and signal processing method thereof An ultra directional speaker system and a signal processing method thereof are disclosed. In accordance with the present invention, the pre-distortion compensation may be applied to the input signal in real time and a signal to be modulated is subjected to a VSB mod... | 04/19/2011 |
| 7929714 | Integrated audio codec with silicon audio transducer An integrated audio transducer with associated signal processing electronics is disclosed. A silicon audio transducer, such as a MEMS microphone or speaker, can be integrated with audio processing electronics in a single package. The audio processing electronics can... | 04/19/2011 |
| 7920710 | Loudspeaker apparatus An array loudspeaker is constructed by stacking loudspeaker rows in a plurality of stages, each of the loudspeaker rows being formed by arranging loudspeaker elements in the form of a horizontal line. The loudspeaker rows are arranged in a zigzag form by, for exampl... | 04/05/2011 |
| 7907740 | Electrostatic ultrasonic transducer drive control method, electrostatic ultrasonic transducer, ultrasonic speaker using the same, audio signal reproduction method, ultra-directional acoustic system, and display device A Push-Pull-type electrostatic ultrasonic transducer includes a first electrode having a through hole, a second electrode having a through hole making a pair with the through hole of the first electrode, and a vibration film held between a pair of electrodes compose... | 03/15/2011 |
| 7899196 | Digital microphone An integrated circuit, configured to process microphone signals, where the integrated circuit comprises: a preamplifier (306) with an amplifier section (301) which has a first input (φ) and a second input (φ*) and an output (φ), and with a feedback ... | 03/01/2011 |
| 7804968 | Condenser microphone The occurrence of noise caused by external electromagnetic waves is prevented and a high voltage is prevented in a microphone case, so that the possibility of an electrical shock is eliminated. A condenser microphone, comprising a microphone case (shield case) 10... | 09/28/2010 |
| 7769190 | Audio signal processing circuit and a display device incorporating the same An audio signal processing circuit for processing an audio signal which is compact and small is provided. For the audio signal processing circuit of the invention, an input circuit, a feedback circuit, and a smoothing circuit are formed using a chip capacitor with s... | 08/03/2010 |
| 7697702 | Condenser microphone The present invention provides a condenser microphone having a proximity sensor consisting of an infrared light emitting diode and an infrared photodetector, the condenser microphone preventing the occurrence of noise and the malfunctioning of the infrared photodete... | 04/13/2010 |
| 7688987 | Electret microphone buffer circuit with significantly enhanced power supply rejection A microphone buffer circuit being adaptable for connection to a power source is disclosed. The microphone buffer circuit includes an input transistor operably connected between an input and an output for buffering an input signal. The microphone buffer circuit inclu... | 03/30/2010 |
| 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 to provide good sound reproduction. | 02/23/2010 |
| 7630504 | Microphone comprising integral multi-level quantizer and single-bit conversion means The invention relates to a digital microphone comprising an integral analog-to-digital converter based on a multi-level quantizer in cascade with a digital signal converter which is adapted to provide a single-bit output signal. Digital microphones in accordance wit... | 12/08/2009 |
| 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 circuit including a plurality of resistor elements. A switch is provid... | 12/08/2009 |
| 7580532 | Multi-channel pulse width modulation apparatus Disclosed are multi-channel PWM (Pulse Width Modulation) apparatuses and methods for modulating PCM-based multi-channel audio signals read from an optical medium into PWM-based multi-channel audio signals. A multi-channel PWM apparatus and method can reduce noise fr... | 08/25/2009 |
| 7522737 | Microphones with equal sensitivity A microphone and a method for producing a microphone with a sensitivity stipulated within narrow limits. The microphone each has a microphone capsule and an amplifier. A network of passive components, preferably resistors, is allocated to the amplifier. The sensitiv... | 04/21/2009 |
| 7505600 | Processor control of an audio transducer A controller, either a microprocessor or finite state machine, is used to generate a pulse train whose frequency and duty cycle can be varied to alter the frequency and amplitude of the output of a driven audio transducer. The ability to control both frequency and a... | 03/17/2009 |
| 7502481 | Microphone with ultrasound/audible mixing chamber to secure audio path Methods, microphones, and processors are provided for processing ambient sound waves. Ultrasound waves are combined with the sound waves to create heterodyned sound waves. The heterodyned sound waves are detected and, in response, a sound detection signal containing... | 03/10/2009 |
| 7499557 | Driving method of speaker and the driving circuit thereof The present invention relates to a driving method of speaker and the driving circuit thereof by employing the technique of converting digital sound signals into corresponding driving signals to drive the speaker. The driving method of the speaker comprises the steps... | 03/03/2009 |
| 7463743 | Electronic driving circuit for directing an audio signal selectively to one of two speakers A driving circuit selectively operates a hands-free loudspeaker and an earpiece speaker of a mobile terminal. The driving circuit includes a voiceband electronic circuit with a balanced output adapted for being switched between an in-phase and an opposite-phase mode... | 12/09/2008 |
| 7443990 | Voltage biased capacitor circuit for a loudspeaker A voltage biased capacitor circuit (10) for a loudspeaker (14′) includes at least two audio circuit capacitors (32A, 32B) wired in series either on one of an audio connector or between audio connectors (16A′, 16B′). A ... | 10/28/2008 |
| 7391873 | Microphone with voltage pump An integrated circuit (102) configured to provide a microphone output signal, comprising: a preamplifier (108) coupled to receive an input signal, generated by a first microphone member that is movable relative to a second microphone member; and a volt... | 06/24/2008 |
| 7391872 | 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 carrier signal with a processed audio signal, a driver amplifier for amp... | 06/24/2008 |
| 7391877 | Spatial processor for enhanced performance in multi-talker speech displays Optimal head related transfer function spatial configurations designed to maximize speech intelligibility in multi-talker speech displays by spatially separating competing speech channels combined with a method of normalizing the relative levels of the different tal... | 06/24/2008 |
| 7386135 | Cardioid beam with a desired null based acoustic devices, systems and methods An acoustic device is provided with first and second one or more acoustic elements to generate a first signal that includes mostly undesired audio and substantially void of desired audio, and a second signal that includes desired as well undesired audio respectively... | 06/10/2008 |
| 7382889 | Condenser microphone The present invention prevents the occurrence of noise caused by an external electromagnetic wave. The present invention also prevents a high voltage from appearing in the microphone case, thus avoiding the possibility of an electric shock. A condenser microphone in... | 06/03/2008 |
| 7376236 | Piezoelectric film sonic emitter A speaker device for emitting subsonic, sonic or ultrasonic compression waves comprising a generally hollow drum, a rigid emitter plate attached to the drum, and a plurality of apertures formed within the plate which are covered by a thin piezoelectric film disposed... | 05/20/2008 |
