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Microphone array exploratory study
The Journal of the Acoustical Society of America, 2013In the field of acoustic signal processing, one of the most popular areas of research is that of microphone arrays. As a small research project in this field, a microphone array system with adjustable polar response will be developed. It is worth noting that this submission is more a research proposal than an abstract. This research will take part as a
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High directivity microphone array
The Journal of the Acoustical Society of America, 2003A microphone array for providing a focused field of optimum audio reception is disclosed. The array has a series of interconnected microphones spaced within a housing. At a midpoint of the spaced microphones is an illuminated polarized centering marker which gives the user a visual signal that the user is located within the optimum filed of audio ...
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Small aperture microphone arrays
The Journal of the Acoustical Society of America, 2015Superdirectional microphone arrays are arrays that are typically smaller than the acoustic wavelength and attain directional gains that exceed those of a classical delay-sum beamformer. Early superdirectional microphones utilized a combination of a velocity microphone along with a pressure microphone.
Gary W. Elko, Jens Meyer
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Microphone array signal enhancement
The Journal of the Acoustical Society of America, 2007A system and method facilitating signal enhancement utilizing an adaptive filter is provided. The invention includes an adaptive filter that filters an input based upon a plurality of adaptive coefficients and modifies the adaptive coefficients based on a feedback output. A feedback component provides the feedback output based, at least in part, upon a
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Self-calibrating microphone array
The Journal of the Acoustical Society of America, 1999A popular application for microphone arrays is speech pick up in situations where a close spacing between talker and microphone is not suitable. A beamformer is used to achieve a directivity pattern that maximizes the ratio between the desired signal and noise sources. Here a fixed beamformer is evaluated. A fixed beamformer means that the coefficients
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Acoustically Coupled Microphone Arrays
Journal of Vibration and Acoustics, 2016An analysis is presented of the performance benefits that can be achieved by introducing acoustic coupling between the diaphragms in an array of miniature microphones. The introduction of this coupling is analogous to the principles employed in the ears of small animals that are able to localize sound sources. Measured results are shown, which indicate
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Spherical Microphone Array Beamforming
2010Spherical microphone arrays have been recently studied for spatial sound recording, speech communication, and sound field analysis for room acoustics and noise control. Complementary studies presented progress in beamforming methods. This chapter reviews beamforming methods recently developed for spherical arrays, from the widely used delay-and-sum and
Boaz Rafaely +4 more
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2001
Microphone-array hearing aids provide a promising solution to the problems encountered by hearing-impaired persons when listening to speech in the presence of background noise. This chapter first discusses implementation issues and performance metrics specific to the hearing-aid application.
Julie E. Greenberg, Patrick M. Zurek
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Microphone-array hearing aids provide a promising solution to the problems encountered by hearing-impaired persons when listening to speech in the presence of background noise. This chapter first discusses implementation issues and performance metrics specific to the hearing-aid application.
Julie E. Greenberg, Patrick M. Zurek
openaire +1 more source