3M uses cookies on this site. This site and 3M selected service providers place cookies, containing text files, on your computer to recognize your computer and:

  • personalize your experience on 3M websites
  • show you ads tailored to your interests
  • collect anonymous statistical information to enhance site functionality and performance.

Learn the benefits of accepting these cookies

You can change your cookie settings at any time by clicking on the Cookie Preferences link at the bottom of the page.

Some opt-outs may fail due to your browser's cookie settings. If you would like to set opt-out preferences using this tool, you must allow third party cookies in your browser settings.

By clicking Accept and Proceed, you confirm your understanding and agreement for cookie settings as indicated on the left.

Accept and Proceed

Skip to Primary Navigation Skip to Site Navigation Skip to Main Content All 3M.com Site Map
3M<sup>™</sup> Littmann® YouTube

Ambient Noise Reduction Technology

Don't miss the sounds you need to hear

With proprietary Ambient Noise Reduction Technology, you’ll more easily detect critical sounds – such as S3 gallops, aortic regurgitation murmurs, abnormal lung sounds and all the sounds you need to hear – even in noisy work environments. You can also amplify the sound level up to 24 times, for sounds that are especially faint.

Ambient Noise Reduction Technology cancels 85% (on average) of ambient background noise.

Volume control lets you amplify critical body sounds up to 24 times.

Available with the Littmann® Model 3100 and Littmann® Model 3200 stethoscopes, Ambient Noise Reduction Technology works with the reduced friction and sound amplification features to deliver an exceptional auscultation experience.

For an additional level of performance, the Model 3200 allows you to record sounds, as well as transmit and share sounds with colleagues using Bluetooth® technology.

Bluetooth® is a registered trademark of Bluetooth SIG, Inc.

Find the right Littmann® Stethoscope

Compare stethoscope features and styles.

Browse Stethoscopes Cleaning and Care

Buy Smart

To ensure that your 3M™ Littmann® Stethoscope is the real deal, purchase it online or in person through authorized retailers only. Beware of counterfeit 3M™ Littmann® Stethoscopes sold by unauthorized outlets.

Where to Buy Where to Buy


General Stethoscopes General Stethoscopes

Cleaning & Care Cleaning & Care

Product Information Product Information