| Title: |
An acoustic direction finder. |
| Authors: |
Coker, C. H.; Fischell, D. R. |
| Source: |
Journal of the Acoustical Society of America; 1983, Vol. 74 Issue S1, pS6-S6, 1p |
| Abstract: |
A simple procedure is described for finding the direction to the source of an acoustic signal-primarily the human voice. The method, in effect, constructs the cross correlation of severely distorted signals from two microphones. The distortion, a combination of time-domain processing and digital logic, is such to give strong preference to direct-path early arrivals over reflections that follow, and to produce streams of pulses whose cross correlations can be computed very simply. The method has been implemented as a combination of custom hardware, and a simple microprocessor. The implementation operates in real time (with ∼0.2-s delay) and produces outputs to indicate either the azimuth angle, or inter-microphone delay. Possible uses include self-aiming directional microphones, automatic aiming or switching of video cameras, and remote identification of talkers in nonvideo teleconferencing. [ABSTRACT FROM AUTHOR] |
| : |
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| Database: |
Complementary Index |