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Turntable Technology
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3M™ Littmann® Stethoscopes — The Creators of Tunable
Technology |
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Littmann
stethoscope's tunable diaphragm technology offers enhanced
acoustics, versatility and timesaving convenience.
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Switching
between bell and diaphragm modes is as easy as a simple
pressure change on the chestpiece. There is no longer a need
to remove, index and replace for same site auscultation. |
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Bell Mode (low-frequency)
Light contact with chestpiece allows you to hear
low-frequency sounds. |
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Diaphragm Mode (high-frequency)
Without turning the chestpiece over, use firm pressure to
hear high-frequency sounds. |
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Tunable Diaphragm Specifics |
Traditional combination chestpieces have a bell and diaphragm.
The bell is meant to be used for low frequency sounds. The
diaphragm should be used for high frequency sounds. Several
years ago, Littmann stethoscopes introduced a unique,
single-sided chestpiece on the Master Cardiology and Master
Classic II Stethoscopes.
This single-sided chestpiece, combines both bell and diaphragm
modes into one side. The construction of the suspended diaphragm
membrane, combined with the internal attenuater ring within the
chestpiece result in what is referred to as a "tunable
diaphragm." |
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Advantages of Using a Tunable Diaphragm |
When
using a stethoscope with a tunable diaphragm, the user does not
have to remove the chestpiece from the patient in order to
change from the bell to diaphragm mode. Also, the chestpiece is
shaped to provide a more comfortable grip for better feel and
control.
When listening to low frequency sounds with a tunable diaphragm
as opposed to a bell, there will be an increase in amplitude, or
loudness. This is because the sound is coming through a
diaphragm with a larger surface area, as opposed to the smaller
opening on a standard bell. The sound pressure level increases
with an increase in contact area on the patient. |
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