Ground surface sound impedence rate measuring device and method
A technology of acoustic impedance rate and measuring device, which is applied in the field of geophysical prospecting, can solve the problems of inability to detect surface vibration at the same time, low detection efficiency of the surface vibration speed detection system, etc., achieve rapid detection and improve performance
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Embodiment 1
[0029] Embodiment one : see figure 1 , the structure of the local surface acoustic impedance rate measuring device used for detecting the sound pressure level of the surface to be tested includes a signal generator (101), a mixing console (102), a power amplifier (103), a loudspeaker (104), and a sound level meter (105) and computer (107), characterized in that: the signal generator (101), mixer (102), power amplifier (103) and loudspeaker (104) are sequentially connected by wires to form a sound wave emission system, the The sound level meter (105) and the computer (107) are connected through a data line to form a sound pressure level detection system.
Embodiment 2
[0030] Embodiment two : see figure 1 , the local surface acoustic impedance rate measurement method, adopting the device measurement of embodiment one to calculate the required surface sound pressure level amplitude-frequency characteristic curve of the surface acoustic impedance rate, it is characterized in that the measurement steps are as follows:
[0031] (1) Make the sound port of the speaker (104) face the position of the surface to be measured (106);
[0032] (2) Place the sound level meter (105) on the surface to be tested (106) and directly below the sound port of the speaker (104);
[0033] (3) The signal generator (101) sends out a frequency of f 0 The initial sine wave signal is amplified by the mixer (102) and the power amplifier (103) in turn, and then the speaker (104) emits a high-intensity sine wave;
[0034] (4) The sound level meter (105) measures the sound pressure level at the position of the ground surface (106) to be measured, and records it by the ...
Embodiment 3
[0037] Embodiment three : see figure 2 , the structure of the local surface acoustic impedance rate measuring device used to measure the surface vibration velocity includes a signal generator (101), a mixing console (102), a power amplifier (103), a loudspeaker (104), a sound level meter (105), Computer (107), geophone array (201) and multi-channel data acquisition unit (202), characterized in that: the signal generator (101), mixer (102), power amplifier (103) and loudspeaker ( 104) An acoustic wave emission system is formed by connecting wires in sequence, and the geophone array (201), multi-channel data acquisition unit (202) and computer (107) are connected sequentially by data wires to form a surface vibration velocity detection system.
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