Journal of the Korean Institute of Navigation (한국항해학회지)
- Volume 20 Issue 4
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- Pages.71-79
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- 1996
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- 1225-0481(pISSN)
A Study on 2-Dimensional Sound Source Tracking System
2차원적 음원추적에 관한 연구
Abstract
When navigating in or near an area of restricted visibility, it is necessary to be heard the whistle, bell and/or the siren of lighthouses or ships at times. Even though we can get the brief informations about the property of sound, the direction and range of a sound radiator, it is not enough to get the accurate informations for decision making. Generally the audio frequency is known as 16~20, 000Hz, but the earshot is shorten and discrimination of sound is more difficult when there is some noise. The sound pressure is 60dB at the moment when human speaks 1 meter away. Usually the noise pressures are 40dB in a silent room and 60dB on the quiet street, respectively. It this study, the basic algorithm and a method of signal processing are suggested to trace the direction and range of the source radiator using the signals received through not a physical sense but the microphone sensors.
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