Patent
System and method of measuring noise of mobile body using a plurality microphones
TLDR
In this article, a noise measuring system comprising a microphone array and a directivity forming section for controlling the direction of directivity of the microphone array is described, and the optimal value of a delay time of the delay section is set in such a manner that a noise isolation characteristic for causing any mobile noise generator not targeted for noise measurement to come off a directional plane or a directional line formed in the direction in which a deterioration characteristic of the directivity is balanced with each other.Abstract:
In a noise measuring system comprising a microphone array and a directivity forming section for controlling the direction of directivity of the microphone array, the directivity forming section includes delay section and adding section, and the optimal value of a delay time of the delay section is set in such a manner that a noise isolation characteristic for causing any mobile noise generator not targeted for noise measurement to come off a directional plane or a directional line formed in the direction of directivity of the microphone array and a deterioration characteristic of the directivity of the microphone array balance with each other.read more
Citations
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PatentDOI
Intrabody communication with ultrasound
William D. O'Brien,Albert S. Feng,Bruce C. Wheeler,Charissa R. Lansing,Herbert Bächler,Robert C. Bilger +5 more
TL;DR: In this paper, a hearing system has a first module (21) and a second module (30), which are each operable to bidirectionally communicate through an ultrasonic communication link comprising at least a portion of the body of the user.
PatentDOI
Electrode placement for wireless intrabody communication between components of a hearing system
Crista Malick,Qi Xie,Mitesh Parikh,Steven J. Franke,Douglas L. Jones,Jeffery B. Larsen,Christopher D. Schmitz,Francois Callias +7 more
TL;DR: In this article, a number of ear-worn hearing system devices are provided that each include a pair of electrodes to transmit time varying electrical signals there between when in contact with skin of a user's body.
PatentDOI
Binaural-signal-processing techniques
Albert S. Feng,Chen Liu,Robert C. Bilger,Douglas L. Jones,Charissa R. Lansing,William D. O'Brien,Bruce C. Wheeler +6 more
TL;DR: In this article, a desired acoustic signal is extracted from a noisy environment by generating a signal representative of the desired signal with processor (30) using a discrete Fourier transform process.
PatentDOI
Systems and methods for interference suppression with directional sensing patterns
Albert S. Feng,Michael E. Lockwood,Douglas L. Jones,Charissa R. Lansing,William D. O'Brien,Bruce C. Wheeler,Robert C. Bilger +6 more
TL;DR: In this article, an acoustic sensor array (20) coupled to processing subsystem (30) is used to extract a desired acoustic signal through the suppression of interfering signals, which is performed by modifying the array inputs in the frequency domain with weights selected to minimize variance of the resulting output signal.
PatentDOI
Binaural signal processing using multiple acoustic sensors and digital filtering
Albert S. Feng,Chen Liu,Douglas L. Jones,Robert C. Bilger,Charissa R. Lansing,William D. O'Brien,Bruce C. Wheeler +6 more
TL;DR: A technique to enhance noise reduction from multiple sources based on two-sensor reception is described and techniques to localize multiple acoustic sources are also disclosed.
References
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PatentDOI
Adaptive microphone array
Juergen Cezanne,Gary W. Elko +1 more
TL;DR: In this paper, a method of apparatus of enhancing the signal-to-noise ratio of a microphone array is proposed, where the array includes a plurality of microphones and has a directivity pattern which is adjustable based on one or more parameters.
Patent
Acoustic sensor system for vehicle detection and multi-lane highway monitoring
TL;DR: In this paper, the authors proposed a multi-lane traffic monitoring system based on detecting the acoustic signals motor vehicles create and radiate during operation, which includes an array of electro-acoustic sensors for converting impinging acoustic wavefronts to analog electrical signals.
Patent
Directional microphone apparatus
Atsushi Sakamoto,Makoto Iwahara +1 more
TL;DR: In this article, a directional microphone apparatus includes an array of at least three sets of microphone units, circuits for processing the output signals from the microphone units to produce a first signal which varies in accordance with the second order bidirectional sound pressure gradient characteristic of the array.
Patent
Passive acoustic traffic monitoring system
Gregory Reid Lee,Yie-Ming Chen +1 more
TL;DR: In this article, a microphone array is mounted high above the road surface, and the output signals of the microphones, filtering, beamforming and storing the digitized signals to provide separate power histories for separate locations in individual lanes.
PatentDOI
Frequency independent directionally sensitive array in seismic surveying
TL;DR: In this paper, a novel array of vertically and horizontally spaced hydrophones is shown which is capable of high ratio of desired signal to noise because of good directional sensitivity when used with any seismic source.