Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1980-11-21
1983-04-05
Fuller, Benjamin R.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
179181R, 181157, 181160, 181173, 181199, H04R 714, H04R 906
Patent
active
043792138
ABSTRACT:
A barrel-shaped diaphragm comprising a plurality of barrel stave-like strips with slits forming gaps between them is mounted on the vibration coil of a vibration generator that is based on a housing. A traverse bar which is based on the housing extends up through the center of the diaphragm. A sound conducting member that is cylindrical at the bottom and domed at the top is disposed on the vibration generator, within the diaphragm, and provides a gap of increasing cross-sectional area expanding toward the open upper end of the diaphragm. An inverted pot-shaped top is mounted on the upper end of the diaphragm. This top has an upper end wall with a depending sidewall that tapers in conically near the lower end. A plurality of struts extend obliquely from the tapered portion to the traverse rod to connect the lower end of the top, and thus the upper end of the diaphragm to the rod, and thus to the housing of the fibration generator. In one embodiment the top is filled with sound-damping material; in another a coaxial pipe is provided as a baffle, and sound outlet holes are provided in the top near the lower end. The diaphragm may be made of a single strip that is bent into an annulus. The diaphragm may be coated with sound damping material.
REFERENCES:
patent: 1690726 (1928-11-01), Holinger
patent: 3424873 (1969-01-01), Walsh
patent: 3826333 (1974-07-01), Buckwalter
patent: 4064966 (1977-12-01), Burton
BM-Elektronik Meletzky KG
Fuller Benjamin R.
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