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US 4,941,179 AGranted
Method for the regulation of a hearing aid, a hearing aid and the use thereof
AssigneeGN Davavox A/S
InventorsHans Bergenstoff, Torsten Otto
Life of this patent
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Abstract
A hearing aid for relieving high frequency hearing loss, includes a volume control that allows the user to gradually adjust and increase the degree of compensation at a pace which corresponds to their particular need. The volume control changes the slope of the response from a flat insertion gain response, when it is turned down, to a rising insertion gain, when it is turned up. Thus, the volume control is not a traditional gain control but a slope control by which the sound clarity can be adjusted.
Claims2
A hearing aid comprising:
- a sound inlet with sound detector;
- an adjustable electronic analog amplification circuit including a pre-amplifier and an output amplifier;
- a sound reproducer;
- a regulation part including first regulation means for adjusting the frequency response of the amplification circuit, the regulation part arranged for finger operation at any time thereby allowing the user to directly gradually adjust the amplifier's frequency response slope for frequencies above a transition frequency and for frequencies in an amplitude range above a frequency independent amplitude setting so that the variable treble boost is obtained according to the user's individual needs and acceptance;
- where said transition frequency is between 500 Hz-2 Khz;
- wherein said regulation part includes second regulation means arranged to regulate the basic amplification of the amplifier circuit in a substantially frequency independent manner and
- wherein said regulation part further includes a third-order filter, the third-order filter comprising a resistor-capacitor network and an amplification circuit with a feedback path which contains an additional amplifier, wherein the third-order filter determines the frequency response and thus determines the degree of variable treble boost.
4 more elements
Dependencies are inferred from the claim text.