I seek a circuit suggestion for the following application:
I want to place a small microphone on the outer surface of a pipe adjacent to a zone that has turbulent flow of liquid moving through it, i.e. the microphone serves as a stethoscope.
I seek a suggestion for a microphone selection and preamp circuit powered by 5VDC, with an amplified output of the microphone input, i.e. 0 to about 5volts. I wish to send the pre-amp output to a frequency counter. I will [later] correlate the frequency to volumetric flow rate of liquid through the pipeline. I do not care much about waveform. I simply want to have a 0-to-5 volt AC output that feeds my 0-to-5 volt pulse counter.
I want to place a small microphone on the outer surface of a pipe adjacent to a zone that has turbulent flow of liquid moving through it, i.e. the microphone serves as a stethoscope.
I seek a suggestion for a microphone selection and preamp circuit powered by 5VDC, with an amplified output of the microphone input, i.e. 0 to about 5volts. I wish to send the pre-amp output to a frequency counter. I will [later] correlate the frequency to volumetric flow rate of liquid through the pipeline. I do not care much about waveform. I simply want to have a 0-to-5 volt AC output that feeds my 0-to-5 volt pulse counter.