Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1981-04-13
1982-09-14
Fuller, Benjamin R.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
181130, A61B 702
Patent
active
043490832
ABSTRACT:
An acoustic ear mold for intensifying sound pressure for an acoustic signal derived from an electronic hearing aid worn by a patient, characterized by an ear canal component having defined therein a segmented, air-filled resonating cavity including four coaxially aligned, contiguous cavity segments arranged in communicating relation for intensifying sound pressure in the range of 250 hz to 6,000 hz, the diameter of the segments being mutually unique, the lengths of the end-most cavity segments being equal while the axial lengths of the segments interposed between the end-most segments are mutually unique with respect to all other segments of the cavity, a tubular conduit is connected with the cavity for conveying acoustic signals from the hearing aid while an acoustic output chamber extends from the segmented cavity to the terminous of the component for delivering to the tympanic membrane of the wearer, pressure-intensified acoustic signals.
REFERENCES:
patent: 3303902 (1967-02-01), Knott
patent: 3688863 (1972-09-01), Johnson
patent: 4010820 (1977-03-01), Johnson
patent: 4094315 (1978-06-01), Leight
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