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Dual-purpose Auscultation device and memory enhancer circuit

Dual-use machine learning auscultation electrical schematic diagram shown in Figure 34. Mechanical vibrations of sound waves by the piezoelectric ceramic is converted to voltage changes with the acoustic signal. Amplified by the LM386 audio amplifier IC, and then restore the sound by the piezoelectric film, therefore, can also be used as a memory enhancer.

High sensitivity of the machine, the external input jack XJ1 a piezoelectric film, can be as high sensitivity to receive the electronic stethoscope and acoustic Used.Circuit in the microphone and headphones are used F27mm piezoelectric ceramics.

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Dual-purpose Auscultation device and memory enhancer circuit