We are making a stethoscope using MEMs digital Mic with 20hz to 20Khz and wish to use TI Preamp and Op Amp and are thinking to use OPA323 as Preamp and OPA1633 as amplifier for the HR and lung sounds which are in the range of:
30–500 Hz: heart sounds, especially S3;
80–500 Hz: lung sounds and heart valve clicks, S2 splits;
100–1000 Hz: lung sounds;
20–2000 Hz: wideband mode.
Amplification needed is 100x
Are thes above two amplifiers okay to use or any other amplifier would be better?