Bioacoustic device
First Claim
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1. An acoustic device comprising a cone whose diameter ranges between 5 and 10 cm at its widest, of depth between 5 and 15 mm, with a circular field effect transistor microphone of diameter between 0.5 and 2 mm situated at the pointed end of the cone.
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Abstract
An acoustic device comprising a cone whose diameter ranges between 5 and 10 cm at its widest, of depth between 5 and 15 mm, with a circular field effect transistor microphone of diameter between 0.5 and 2 mm situated at the pointed end of the cone.
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Citations
13 Claims
- 1. An acoustic device comprising a cone whose diameter ranges between 5 and 10 cm at its widest, of depth between 5 and 15 mm, with a circular field effect transistor microphone of diameter between 0.5 and 2 mm situated at the pointed end of the cone.
- 11. An electronic stethoscope including a body defining an opening in an external surface of the body for placement against the skin, the opening being located at one end of a cavity in the body, and an electronic microphone located at another end, remote from the opening, of the cavity, the cavity progressively decreasing in area from the opening to the electronic microphone, the difference in area between the cavity at the opening and at the location of the electronic microphone providing a mechanical gain for the stethoscope of from 2500 to 10000.
Specification