3M Littmann Electronic Stethoscope 4100WS with Ambient Noise Reduction and Sound Analysis Software

Featuring amplification up to 18 times greater than most advanced conventional 3M™ Littmann® Stethoscopes and proprietary Ambient Noise.

• Reduction (ANR) technology allowing you to reduce ambient noise by an average of 75% (-12dB) without eliminating critical body sounds.
• Specially designed to pick up difficult-to-hear heart and other body sounds
• Amplification up to 18 times greater than most advanced conventional 3M™ Littmann® Stethoscopes
• Ambient Noise Reduction (ANR) technology allowing you to reduce ambient noise by an average of 75% (-12dB) without eliminating critical body sounds.
• Three response modes. Bell mode for frequencies 20-200Hz. Diaphragm mode for frequencies 100-500Hz. A unique extended range mode for frequencies 20-1000Hz.
• Recording, storage and playback capabilities for six different auscultations, available at normal and half speed.
• Infrared data transmission of recorded sounds to either another Model 4100WS or for download to an IBM-compatible PC, providing the option to share or store sounds.
• Patented Littmann® Snap tight Soft-Sealing Eartips
• Lightweight alloy eartubes and double-leaf binaural spring for more flexibility.

ANR (Ambient Noise Reduction) technology acoustically cancels out an average of 75% of distracting room noise. This acoustic canceling effect is different than electronic filtering, which may also filter out some portions of body sounds. Ambient noise isn’t just in the air; it also travels through the patient’s body. The key to reducing ambient noise is to address both pathways. And ANR does just that without filtering away important sounds. Noise from the room enters the stethoscope through a thin gap in the chestpiece and, once inside, meets noise that enters through the body. The two cancel each other out, leaving the heart, lung and other body sounds you want to hear.