Method for adapting sound in a hearing aid device by frequency modification and such a device

A method for adapting sounds in a hearing aid device to the needs of an end-user of said hearing aid device by frequency modification, said frequency modification being defined by one or more frequency modification parameters being defined as follows:

• a frequency delta (fshift) by which an entire or a partial spectrum is shifted, a linear compression factor, according to which a linear frequency modification is applied to an entire or partial spectrum, a logarithmic or perception based compression factor, according to which a logarithmic or perception based frequency modification is applied to an entire or partial spectrum, a lower spectral bound of a frequency range to which frequency modification is applied, an upper spectral bound of a frequency range to which frequency modification is applied, a number of frequency ranges to which frequency modification is applied, a mapping parameter being part of a frequency mapping function, which maps input frequencies to output frequencies, an amplification parameter indicative of an amplification of modified frequencies relative to an amplification of unmodified frequencies, an intermediate parameter, from which at least one of frequency delta, linear compression factor, logarithmic or perception based compression factor, lower spectral bound, upper spectral bound, number of frequency ranges, mapping parameter, amplification parameter are derived, the method comprising the steps of:
• adjusting said frequency modification in dependence on a result of a sound environment analysis and/or in dependence on an end-user input by adjusting at least one of said one or more frequency modification parameters characterized by further comprising the steps of:
• providing predefined frequency modification parameters for at least a first and a second typical sound environment and/or for at least a first and a second state of an end user controllable parameter and automatically adjusting at least one of said one or more frequency modification parameters based on said predefined frequency modification parameters whenever said sound environment analysis indicates a change of a currently encountered sound environment and/or whenever a change of said end user controllable parameter occurs, wherein said sound environment analysis provides an analysis value indicative of whether a current sound environment is sufficiently noisy to mask normally loud spoken speech or to mask certain normally loud spoken phonemes, wherein at least one of said one or more frequency modification parameters is adjusted in dependence on said analysis value whenever an overall input level of said hearing device is above a threshold.