Which part of the stethoscope is best for high-pitched sounds such as AV and MV regurgitation and pericardial friction rubs?

Which part of the stethoscope is best for high-pitched sounds such as AV and MV regurgitation and pericardial friction rubs?

• A. Diaphragm
• B. Bell
• C. Both Diaphragm and Bell
• D. Otoscope

Answer: (A)

High-pitched sounds are best captured with the stethoscope’s diaphragm. Its flat, wide membrane transmits higher-frequency vibrations most effectively when you place it firmly on the chest, which makes it ideal for detecting high-pitched phenomena like AV and MV regurgitation murmurs and pericardial friction rubs. The bell is tuned for lower-frequency sounds and is used with light pressure, while the otoscope isn’t used for chest auscultation.

High-pitched sounds are best captured with the stethoscope’s diaphragm. Its flat, wide membrane transmits higher-frequency vibrations most effectively when you place it firmly on the chest, which makes it ideal for detecting high-pitched phenomena like AV and MV regurgitation murmurs and pericardial friction rubs. The bell is tuned for lower-frequency sounds and is used with light pressure, while the otoscope isn’t used for chest auscultation.