The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 1996
Filed:
Sep. 26, 1994
Zlatan Ribic, Vienna, AT;
Viennatone Gesellschaft m.b.H., Vienna, AT;
Abstract
A hearing aid with a microphone, a preamplifier connected behind it which is connected to a signal processing voltage-controlled circuit which is provided with a voltage-controlled filter, for example, which is connected to the output amplifier controlling an earpiece. In order to achieve the best possible adaptation it is provided that the signal processing voltage-controlled circuit is connected to a signal analysing circuit (MAC) controlling it, which is in connection on the input side with the preamplifier or output amplifier (30, 50) and is substantially formed by a Hilbert circuit (HS), the two outputs (A, F) of which supplying the momentary values of the frequency and the amplitudes of the input signal are connected to the inputs of corresponding Hilbert circuits via high-pass filters and the outputs of all three Hilbert circuits are in connection with the control inputs of a voltage-controlled signal processing circuit (40).