Method for measuring critical gain on a hearing aid

摘要

The invention relates to a method of making a critical gain measurement. The object of the present invention is to improve the signal-to-noise ratio of a signal to be measured or detected in a hearing instrument compared to prior art solutions, in particular to improve the accuracy of a critical gain measurement. The problem is solved in that the method comprises a) providing that a predefined sound output from the hearing aid on the basis of a predefined electrical signal from a signal generator; b) providing a matched filter for filtering the predefined sound output as received by the input transducer and providing a filtered input signal; c) determining the critical gain of the hearing aid on the basis of the filtered input signal from the matched filter and the predefined electrical signal from the signal generator. An advantage of the invention is that it provides an alternative scheme for improving signal to noise ratio of a hearing aid. The invention may e.g. be used for the customization of hearing aid parameters in cooperation with fitting software and/or for improving signal to noise ratio of a detected or measured signal.