Earth audio electrical instrument
An electrical instrument and audio technology, which is applied in the field of geophysical exploration, can solve the problems of limited promotion and no professional instrument that can be used alone, and achieve the effects of ensuring stability and accuracy, wide application range, and light instrument
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[0025] Example
[0026] Such as figure 1 As shown, an earth audio electrical method includes a main control appliance 1, a display 2, a keyboard 3, a data memory 4, and two identical signal input modules 5. Both signal input modules 5 include sensors 51, The preamplifier attenuation circuit 52, the power frequency suppression circuit 53, the potential compensation circuit 54, the preamplifier circuit 55, the programming amplifying circuit 56, the frequency selective amplifying circuit 57, and the AD sampling circuit 58.
[0027] The main controller 1 is connected to the display 2, the keyboard 3, the data memory 4, and the AD collection circuit 58 respectively. The earth audio signal is collected by the sensor 51, and then passes through the preamp attenuation circuit 52, the power frequency suppression circuit 53, the potential compensation circuit 54, and the front After processing by the set amplifying circuit 55, the programming amplifying circuit 56, the frequency selective am...
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