Littmann® Electronic Stethoscope Model 4100WS

The new Littmann® Electronic Stethoscope Model 4100WS, which has the same functions as the Model 4000WS, but with one significant difference; the Model 4100WS now incorporates 3M's new Ambient Noise Reduction technology.

This technology reduces distracting room noise by an average of 75% (-12dB) over the bell and diaphragm operating range. This stethoscope is uniquely equipped to help you pick up difficult-to-hear heart, lung and other body sounds even when the world around you is filled with distracting noise.

How Ambient Noise Reduction (ANR) works:
The proprietary Ambient Noise Reduction technology internal to the chestpiece, acoustically cancels out an average of 75% of distracting room noise, greatly enhancing overall utility. This acoustic effect is different from electronic filtering, which may also filter out some portions of body sounds clinicians need to hear.