METHOD FOR DETERMINING DISTANCE TO SOUND SOURCE Russian patent published in 2006 - IPC G01S3/80 G01S3/803 G01S5/20 

FIELD: engineering of acoustic bearing indicators, possible use for determining distance to and topographic coordinates of sound source.

SUBSTANCE: in the method, receipt of acoustic signals is performed by two linear groups of sound receivers. In first and second processing channels, electric signals are processed at frequency f, received by first and second linear groups of sound receivers, and in channel of frequency f¹ - signals with frequency f¹, received by first one of linear groups of sound receivers. Bearing to sound source is determined with utilization of relation of voltage amplitudes at outputs of first and second processing channels. Amplitude of signal voltage at output of first processing channel is connected, with supposition, that sound source is positioned on working axis of normalized characteristic of direction of first one of linear groups of sound receivers. Amplitude of sound pressure at input of first one of linear groups of sound receivers at frequency f is formed by dividing calculated value on proportionality coefficient, determined experimentally at frequency f. Level of sound pressure is calculated at input of first one of linear groups of sound receivers. Analogical calculations are performed for signal at frequency f¹. Type of substrate surface is determined, and decrease of sound pressure level, caused by influence from obstructions, meteorological and atmospheric factors. Distance and topographic coordinates are calculated with consideration of influence of aforementioned factors.

EFFECT: decreased systematic and random errors of distance measuring, expanded arsenal of problems solved by bearing indicators and increased capacity of same.

18 dwg