Patent ID: 8411886
Filing Date: 2013-04-02
Classification: H04R

Abstract:
1. A hearing aid, comprising: a sound receiver coupled to receive sound waves and generate a microphone signal representing the sound waves; a transmission unit coupled to receive the microphone signal and generate a power signal as a function of the microphone signal; a sound generator coupled to receive the power signal and generate a sound as a function of the power signal; an audio signal unit coupled to the sound generator and comprises a plurality of tone generators configured to generate respective audio signals with respective fundamental frequency representing a tone and harmonics of the fundamental frequency, wherein the respective audio signals are generated in response to an event signal, wherein at least one of the plurality of tone generators is configured to generate an audio signal based at least in part on a frequency modulation synthesis and comprising a plurality of frequency components over a frequency range, which is sufficiently wide to be perceived by a hearing-impaired user, wherein the respective audio signals comprise tones or chords assigned to convey acoustic information to the hearing-impaired user effective to identify a predefined hearing aid event comprising a change of a hearing program for the hearing aid; and a summer coupled to receive the respective audio signals from the plurality of tone generators to supply a summer output signal comprising a sum of the respective audio signals from the plurality of tone generators, wherein the summer audio signal comprises a plurality of mutually different frequencies extending over a sufficiently wide frequency range so that the hearing-impaired user of the hearing device can perceive the summer audio signal.