Location of noise sources using a phase-slope method
Abstract
Two three-element microphone arrays have been used to predict the position of both pure-tone and broadband noise sources in an anechoic chamber under different ground impedance conditions. Source positions are predicted using the slope of phase-frequency plots between array elements. A phase-slope method for quantitatively assessing both the accuracy and precision of estimates of noise source location is introduced and illustrated. When the phase-slope method is used, there is higher accuracy and more precision in estimates of source location with a small ground impedance than with a large ground impedance. As would be expected, ground impedance effects are larger for low elevation angles than for high elevation angles.
- Publication:
-
Unknown
- Pub Date:
- November 1985
- Bibcode:
- 1985lnsu.rept.....D
- Keywords:
-
- Acoustic Measurement;
- Broadband;
- Gradients;
- Microphones;
- Noise Generators;
- Position (Location);
- Anechoic Chambers;
- Impedance Measurement;
- Purity;
- Acoustics