The Best Stethoscope for Lung Sounds Auscultation

Auscultation of the heart and lungs is an essential feature of accurate patient assessment and diagnosis. Breathing and pulmonary assessment used to be primarily the duty of physicians, but this has changed in recent decades.

Now respiratory therapists, nurses, EMTs, and paramedics perform auscultation regularly in clinical settings and in the field. For this reason, identifying the best stethoscope for lung sounds is important for professionals across the health care spectrum.

Best Stethoscope for Lung Sounds

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What are the features of a high-quality stethoscope for lung ascultation?

A good stethoscope should have a sturdy chestpiece made from precisely machined stainless steel or brass. The diaphragm should be flexible, durable, and fit into the chestpiece with a tight seal.

Tubes should be thick, and most preferably, dual lumen. Ear pieces should be be soft, angled, comfortable to wear while fitting snugly into the ear.

Each of these features contributes to the stethoscope’s ability to deliver clear sound to the user. The fit of the ear pieces can sometimes make the difference between clarity and inaudibility. A good fit not only transmits sound more efficiently, it blocks out disruptive ambient noises. Dual lumen tubing also delivers better sound to the user.

As the interface between patient and instrument, a quality diaphragm is crucial. Small air leaks between diaphragm and chestpiece corrupt a scope’s performance, as does inferior material. The quality of the diaphragm is generally one of the biggest indicators of overall stethoscope performance.

What is the best stethoscope for lung sounds?

Reviews from respiratory therapists, physicians, nurses, and emergency medical personnel overwhelmingly point to one choice for lung sounds: the Littmann Cardiology III. They point to the Cardiology III’s tunable diaphragm, high quality acoustics, comfortable fit, and double head chestpiece as major strengths. Reviewers do mention the Cardiology III’s hefty weight as a feature that takes some getting used to; however, they also like its weight as an indication of a superior build.

Here’s an excerpt from a respiratory care nurse’s 2011 review of the Cardiology III. We think this one says it all! You can read the entire review at

The Littmann’s Cardiology III Stethoscope is my favorite stethoscope to use when I’m at work. I am a nurse on the respiratory care unit and my stethoscope is always a big part of my day….The Littmann’s stethoscope allows me to be able to accurately assess my patients heart tones and respiratory sounds to accurately diagnose each patient. Using this particular stethoscope, bowel sounds, breath sounds and heart sounds are heard very clearly and loud unlike other stethoscopes on the market. Even heart sounds that are very distant are heard great through the Littmann.

The Cardiology III was named an “easy winner” for the best cardiology scope in a 2008 physician’s study that compared six popular scopes. We agree completely! Outstanding acoustics, comfortable ergonomics, and quality manufacture make the Cardiology III clearly the best stethoscope for lung sounds auscultation.

With 265 customer reviews on Amazon ‒ and 84% of purchasers giving it a perfect 5-star rating ‒ you’ll find a great many reasons to come to the same conclusion. If you’re in the market for a top quality auscultation stethoscope, you really can’t go wrong with the Cardiology III.