i make sthetoscope digital using ecm,
can't capture heart sound (i mean low) but can capture sound outside the sthetoscope (audible).
note : if i using stetoscope without ecm and connected to my ear,
i can hear the heart sound (audible)
what is wrong with my stetoscope ???
my rating sound( low - audible - loud)
my circuit
my project
right is stetoscop with mic
center is circuit
left is audio jack to soundcard laptop
can't capture heart sound (i mean low) but can capture sound outside the sthetoscope (audible).
note : if i using stetoscope without ecm and connected to my ear,
i can hear the heart sound (audible)
what is wrong with my stetoscope ???
my rating sound( low - audible - loud)
my circuit
my project
right is stetoscop with mic
center is circuit
left is audio jack to soundcard laptop