How does a stethoscope amplify sound
A stethoscope picks of vibrations from heart or lungs in the diaphragm, the sound passes into the tube, then to the Dr's ears.
More Answers to "How does a stethoscope amplify sound"
- How does a stethoscope amplify heart sounds?
- It picks up the sounds from a very short distance from the heart, and because the area of the sensor is larger than the area of the earpieces it amplifies the resulting air movement at the ears. So it not only effectively places your ears o...
- Why use AUDICOR® when physicians can perform auscultation with am...?
- Auscultation is difficult. Overcrowded emergency departments and noisy clinical environments negatively impact clinicians' abilities to accurately detect these low-frequency sounds. Since amplified stethoscopes just make all the heart's sou...
- How does the stethoscope amplifies?
- Modern stethoscopes consist of a shallow bell-shaped device with a clear stiff diaphragm, connected to the ear pieces by flexible tubing and a hollow metal headset. The chest piece is placed directly on the patient's skin. As the patient ta...
Related Questions Answered on Y!Answers
- how does a stethoscope amplify heart sounds?
- Q: please help!
- A: It picks up the sounds from a very short distance from the heart, and because the area of the sensor is larger than the area of the earpieces it amplifies the resulting air movement at the ears. So it not only effectively places your ears on the skin but amplifies what you would hear in direct contact.
- What concepts of Physics make the stethoscope work?
- Q: What principle allows the stethoscope to amplify the sound? What happens to the the sound waves inside the stethoscope?
- A: I suppose that it is the conservation of energy, and Bernoulli's principle - which is really a part of the conservation of energy. You place a large flexible 'plate', or diaphragm, over the persons chest, and it will move slightly according to the vibrations sent from the beating heart. When the diaphragm moves, it moves the enclosed air behind it. It transfers energy to the air that is in contact with the inner surface of the diaphragm. As the air moves away from the diaphragm the enclosure becomes narrower and narrower, but the energy of the waves stays the same, so instead of having the distance parallel to the diaphragm to move in, it moves more and more in the direction perpendicular to the diaphragm; that is, it moves back and forth in the tube with more force. And as the space continues to narrow, it goes back and forth with more and more amplitude. Bernoulli's Principle states that when a moving liquid or gas is restricted in a pipe, the gas or liquid in the narrow part of the pipe will move the fastest. And since the sound pressure waves are moving back and forth, they move back and forth faster. Since they move faster for the same period of time, they must move farther.This sort of focalization of the energy of the diaphragm into a high energy narrow tube is then used to move another smaller diaphragm near the listener's ear. Since this diaphragm is much smaller, it will vibrate with more amplitude since it is being driven by the energy from the larger diaphragm, making it sound as if the sound wave had been amplified.
- Can use a stethoscope as a "listening" device?
- Q: On last week's Doctor Who (in the UK) the Doctor was shown to be listening at a window with a medical stethoscope. Is this possible? Would the stethoscope amplify the sound adequately through glass? If it were used against a wall, made from double course bricks, would it amplify the sound effectively here, too?It's a "in theory" question I guess but I do like to know whether the physics in films/tv is at least partly accurate...
- A: You can buy listening devices that can be used on single glazing or thin walls. They are based on the stethoscope principal but more sophisticate and more costly.
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