Source location experiments in a wedge waveguide were conducted to test a single channel time domain technique for a known source. The laboratory measurements were made in the air wedge having rigid sheet rock boundar...Source location experiments in a wedge waveguide were conducted to test a single channel time domain technique for a known source. The laboratory measurements were made in the air wedge having rigid sheet rock boundaries. The wedge angle was 6.6 ° . The source transmitted a short oscillatory signal having a frequency band of 3- 13 kHz. The distances of the source and receiver from the wedge apex were 1.75 m and 3.75 m respectively .The Biot-Tolstoy wedge solution was used for calculating the source to receiver impulse response. For the geometry, all the arrivals are due to images. The deconvolution filter is used. The 'output of the deconvolution filter is cross correlated with the known input signal. Maps of possible source locations are made by (1) assuming a trial source location, (2) computing a theoretical impulse response and the corresponding deconvolution filter, (3) filtering the signal, and (4) mapping the peak absolute maximum of the deconvolution filter output. The actual source location is correctly mapped. There are several lower amplitude maxima that gave false source locations.展开更多
文摘Source location experiments in a wedge waveguide were conducted to test a single channel time domain technique for a known source. The laboratory measurements were made in the air wedge having rigid sheet rock boundaries. The wedge angle was 6.6 ° . The source transmitted a short oscillatory signal having a frequency band of 3- 13 kHz. The distances of the source and receiver from the wedge apex were 1.75 m and 3.75 m respectively .The Biot-Tolstoy wedge solution was used for calculating the source to receiver impulse response. For the geometry, all the arrivals are due to images. The deconvolution filter is used. The 'output of the deconvolution filter is cross correlated with the known input signal. Maps of possible source locations are made by (1) assuming a trial source location, (2) computing a theoretical impulse response and the corresponding deconvolution filter, (3) filtering the signal, and (4) mapping the peak absolute maximum of the deconvolution filter output. The actual source location is correctly mapped. There are several lower amplitude maxima that gave false source locations.
