Page "Stethoscope" Paragraph 13

An electronic stethoscope ( or stethophone ) overcomes the low sound levels by electronically amplifying body sounds.

However, amplification of stethoscope contact artifacts, and component cutoffs ( frequency response thresholds of electronic stethoscope microphones, pre-amps, amps, and speakers ) limit electronically amplified stethoscopes ' overall utility by amplifying mid-range sounds, while simultaneously attenuating high-and low-frequency range sounds.

Currently, a number of companies offer electronic stethoscopes.