It is used to collect and amplify the sound inside body organs like heart, lung, arteries, vein, etc., which is applicable for use in hospital, clinic, examination institution, ambulance, home and camping rescue, etc.

Main performance
100 Hz ~ 500 Hz as the reference of the testing sound source:

Outer diameter of auscultation head > 35 mm, damping ≤ 16 dB

500 Hz ~ 1000 Hz as the reference of the testing sound source:

Outer diameter of auscultation head > 35 mm, damping ≤ 20 dB