Method for determining a compression characteristic, method for determining a knee point and method for adjusting a hearing aid

摘要

The fitting of a hearing device and in particular of a hearing aid using frequency compression is to be simplified. A method for determining a knee point of a frequency compression characteristic for a hearing device is therefore proposed wherein a maximum audible frequency of a hearing device user is first determined and the knee point is then determined using a predefined rule in dependence on a maximum audible frequency. An end point of a compression characteristic can also be automatically determined.

主权项

1. A method for determining a knee point of a frequency compression characteristic for a hearing device, which comprises the steps of:
determining a maximum audible frequency of a hearing device user; determining the knee point by means of a predefined rule in dependence on the maximum audible frequency, parameters of the frequency compression characteristic constituted on a basis of frequency groups; calculating the knee point using Bark scale values; and calculating a coordinate f13 cutoff of the knee point using the formula:
f_cutoff=1960·((f_max_bark−no_bands_down+0.53)/(26.28−(f_max_bark−no_bands_down)), where f_max_bark is the maximum audible frequency converted into a Bark value, and no_bands_down is a number of frequency groups defined in dependence on the maximum audible frequency.