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7616768 |
Vehicle accessory microphone having mechanism for reducing line-induced noise
A microphone assembly includes one or more transducers positioned in one or more housings. A processing circuit is coupled to the transducer for outputting an electrical signal such that the...
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7613309 |
Interference suppression techniques
System ( 10 ) is disclosed including an acoustic sensor array ( 20 ) coupled to processor ( 42 ). System ( 10 ) processes inputs from array ( 20 ) to extract a desired acoustic signal through the...
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7599705 |
Wireless transmitter and hearing system
A wireless transmitter includes an antenna and a signal generator. A control signal input to the signal generator controls a frequency band of a carrier frequency. The control signal also controls...
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7599502 |
Sound control installation
The invention concerns a sound control installation for at least one electrical unit comprising two cameras ( 4, 5 ) to take pictures of an area (A) in a space containing the electrical units;...
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7596230 |
Method for detection of ultrasound in a listening device with two or more microphones, and listening device with two or more microphones
The invention concerns a method for detecting and minimizing the harmful influence of ultra sound in a listening device having two or more microphones. The energy contents in the microphone signals...
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7590253 |
Hearing aid having switchable first and second order directional responses
A hearing aid apparatus is disclosed that employs both an omnidirectional microphone and at least one directional microphone of at least the first order. The electrical signals output from the...
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7587058 |
Method and device for matching the phases of microphone signals of a directional microphone of a hearing aid
The phase differences of microphones of a hearing aid microphone are to be reduced. To do this, the level of an output signal (y 1 ( t )) of a directional microphone is compared with an...
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7587056 |
Small array microphone apparatus and noise suppression methods thereof
The small array microphone apparatus comprises first and second omni-directional microphones, a microphone calibration unit and a directional microphone forming unit. The first and second...
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7587055 |
Sound collection system
Collecting the sound while rotating at least one or more microphone around a rotational axis, the filter processing is carried out in accordance with the positional information of the microphone at...
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7587054 |
Audio system based on at least second-order eigenbeams
A microphone array-based audio system that supports representations of auditory scenes using second-order (or higher) harmonic expansions based on the audio signals generated by the microphone...
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7587053 |
Audio-based position tracking
Embodiments of the present invention provide an audio-based position tracking system. The position tracking systems comprises one or more speakers, an array of microphones and a computing device....
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7586513 |
Arrangement and method for audio source tracking
An arrangement and a method of localizing active speakers in a video conference includes a localization device that locates at least one microphone relative to the camera, while the at least one...
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7583808 |
Locating and tracking acoustic sources with microphone arrays
A method constructs a location model for locating and tracking sources of acoustic signals. Acoustic training signals are acquired from an acoustic training source at an unknown location in an...
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7577266 |
Systems and methods for interference suppression with directional sensing patterns
System ( 10 ) is disclosed including an acoustic sensor array ( 20 ) coupled to processor ( 42 ). System ( 10 ) processes inputs from array ( 20 ) to extract a desired acoustic signal through the...
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7577262 |
Microphone device and audio player
A signal generating section generates a main signal and a noise reference signal. A determining section determines whether a level ratio is larger than a predetermined value. An adaptive filter...
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7567678 |
Microphone array method and system, and speech recognition method and system using the same
A microphone array system including an input unit to receive sound signals using a plurality of microphones; a frequency splitter splitting each sound signal received into a plurality of narrowband...
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7565288 |
Spatial noise suppression for a microphone array
A microphone array having at least three microphones provides a captured signal. Spatial noise suppression estimates a desired signal from a captured signal using spatio-temporal distribution of...
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7561701 |
Method and apparatus for identifying the direction of incidence of an incoming audio signal
To determine the direction of incidence for a signal from an acoustic signal source using a directional microphone system, which has at least two microphones, two or more directional microphone...
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7522736 |
Systems and methods for microphone localization
Systems and methods determine the location of a microphone with an unknown location, given the location of a number of other microphones by determining a difference in an arrival time between a...
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7519187 |
Array speaker system
Input audio signals are divided into low-frequency components and high-frequency components, both of which are subjected to delay processing in correspondence with desired positions of focal points...
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7519186 |
Noise reduction systems and methods for voice applications
Various embodiments reduce noise within a particular environment, while isolating and capturing speech in a manner that allows operation within an otherwise noisy environment. In one embodiment, an...
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7515721 |
Self-descriptive microphone array
A self-descriptive microphone array includes a microphone array memory, such as, for example a ROM, EEPROM, or other conventional memory, which contains a microphone array device description. This...
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7502479 |
Method for analyzing an acoustical environment and a system to do so
Acoustical signals are registered at two locations to generate two electric signals. Based on the electric signals, the distance from one of the locations to the source of the acoustical signal is...
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7492914 |
Audio receiving system
A system is provided for receiving audio signals from a plurality of microphones and transferring the audio signals via a common composite signal channel to a receiving unit, such as a mixing...
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7492911 |
Noise reducing device
The present invention provides an active control type noise reducing device that is disposed at a sound barrier and with which can be obtained an excellent noise reduction effect with respect to...
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7492908 |
Sound localization system based on analysis of the sound field
The beginning detection, accommodation and frequency bias properties of the human hearing mechanism have been modeled to create systems that can detect directional transients (“sound events”)...
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7489788 |
Recording a three dimensional auditory scene and reproducing it for the individual listener
A system for recording and reproducing a three dimensional auditory scene for individual listeners includes one or more microphone arrays ( 2 and 16 ); a support ( 3 ) for holding, moving the...
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7478041 |
Speech recognition apparatus, speech recognition apparatus and program thereof
Provided is a method for canceling background noise of a sound source other than a target direction sound source in order to realize highly accurate speech recognition, and a system using the same....
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7477751 |
Method and apparatus for sound transduction with minimal interference from background noise and minimal local acoustic radiation
A transducer senses sounds produced by a talker or other source and measures acceleration of air. Enhancement of acceleration is accompanied by reduction of the portion of the sound energy that...
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7475014 |
Method and system for tracking signal sources with wrapped-phase hidden markov models
A method models trajectories of a signal source. Training signals generated by a signal source moving along known trajectories are acquired by each sensor in an array of sensors. Phase differences...
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7474755 |
Automatic microphone equalization in a directional microphone system with at least three microphones
Microphone equalization is implemented in a directional microphone system of the second or a higher order with at least three omnidirectional microphones. Initially, the signal levels of the...
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7471987 |
Determining location of an audience member having a portable media monitor
Systems, methods and devices for gathering data concerning media usage by predetermined audience members. An audience measurement code in acoustic energy produced by a media receiver is detected by...
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7471798 |
Microphone array having a second order directional pattern
A directional microphone system is disclosed, which comprises circuitry for low pass filtering a first order signal, and circuitry for high pass filtering a second order signal. The system further...
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7460677 |
Directional microphone array system
A directional microphone array system generally for hearing aid applications is disclosed. The system may employ a broadside or an endfire array of microphones. In either case, the signals...
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7454023 |
Audio processing arrangement with multiple sources
In an audio processing arrangement ( 2 ) input signals from a plurality of input sources ( 4,6 ) are weighted by weighting factors x and y using weighting elements ( 10, 12 ). The weighted input...
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7447320 |
Vehicle accessory microphone
A vehicle rearview mirror assembly ( 201 ) includes one or more microphone assemblies ( 220 a , 220 b ) positioned on the rear surface ( 207 ) of the mirror housing ( 206 ). Recesses ( 248 a , 248...
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7443989 |
Adaptive beamforming method and apparatus using feedback structure
An adaptive beamforming apparatus and method includes a fixed beamformer that compensates for time delays of M noise-containing speech signals input via a microphone array having M microphones (M...
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7443988 |
Vehicle accessory microphone
A microphone includes one or more transducers positioned in a housing. Circuitry is coupled to the transducer for outputting an electrical signal such that the microphone has a main lobe directed...
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7433481 |
Digital hearing aid system
A digital hearing aid is provided that includes front and rear microphones, a sound processor, and a speaker. Embodiments of the digital hearing aid include an occlusion subsystem, and a...
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7428309 |
Analog preamplifier measurement for a microphone array
An analog preamplifier measurement system for a microphone array builds on conventional microphone arrays by providing an integral “self-calibration system.” This self-calibration system...
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7415117 |
System and method for beamforming using a microphone array
The ability to combine multiple audio signals captured from the microphones in a microphone array is frequently used in beamforming systems. Typically, beamforming involves processing the output...
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7409068 |
Low-noise directional microphone system
A low-noise directional microphone system includes a front microphone, a rear microphone, a low-noise phase-shifting circuit and a summation circuit. The front microphone generates a front...
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7409065 |
Apparatus and method for detecting sound direction
An apparatus and method for detecting sound direction is disclosed, which utilizes a plurality of sound source detecting units to receive a plurality of sound signals form a sound source. The sound...
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7408841 |
System and method for calculating the directivity index of a passive acoustic array
A software system and method is presented that calculates the sensor directivity at all spatial angles, and stores these values in a two dimensional matrix. These values are then used as additional...
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7400736 |
Method for extending the frequency range of a beamformer without spatial aliasing
A conferencing unit, comprising an array of microphones embedded in a diffracting object configured to provide a desired high frequency directivity response at predetermined microphone positions,...
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7394907 |
System and process for sound source localization using microphone array beamsteering
A system and process for sound source localization (SSL) utilizing beamsteering is presented. The present invention provides for improved beamsteering with less drain on system resources while...
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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...
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7379553 |
Sound source search system
It is possible to simultaneously identify the sound coming direction from a sound source in all directions and estimate the sound intensity of the sound source. A plurality of microphones ( 11 )...
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7372967 |
Microphone bias circuit
A microphone bias circuit includes a first integrated circuit (IC) pin, a second IC pin, a first resistor, and a variable supply voltage buffer. The first resistor is operably coupled to the first...
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7369669 |
Diotic presentation of second-order gradient directional hearing aid signals
Systems, devices and methods are provided for diotically presenting second-order gradient directional hearing aid signals. The present subject matter provides an improved signal-to-noise ratio, and...
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