Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1977-12-16
1979-04-10
Claffy, Kathleen H.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
179 1DM, 181148, 340 8LF, G10K 1000
Patent
active
041490347
ABSTRACT:
Apparatus for enhancing the resolution of a sound detector of the type which includes an acoustic mirror for focusing sound from an object onto a microphone to enable the determination of the location from which the sound arises. The enhancement apparatus includes an enclosure surrounding the space between the mirror and microphone, and containing a gas heavier than air, such as Freon, through which sound moves slower and therefore with a shorter wavelength than in air, so that a mirror of given size has greater resolving power. An acoustically transparent front wall of the enclosure which lies forward of the mirror, can include a pair of thin sheets with slightly pressured air between them, to form an end of the region of heavy gas into a concave shape.
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patent: 2770795 (1956-11-01), Peterson
patent: 3389373 (1968-06-01), Angeloff et al.
patent: 3895188 (1975-07-01), Ingraham
R. Schlinker et al., "Enhancement of Directional Microphone," AIAA Paper No. 73-1040, Oct. 15, 1973.
F. Grosche et al., "On Aero Acoustic Measurements", AIAA, 1976.
L. Knox, "Underwater Detection", IBM Tech. Discl. Bull., Nov. 1961.
Frosch Robert A. Administrator of the National Aeronautics and Space
Kendall James M.
Claffy Kathleen H.
Kemeny E. S.
Manning John R.
McCaul Paul F.
Mott Monte F.
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