COMPARISON OF DIFFERENT PROCEDURES FOR TONALITY CALCULATIONS.

The persence of distinct tones in environmental noises leads to an increasing anaoyance especially if the tones are of long duration. Before 1992 in Germany the tonal content of noises had to be subjectively estimated by the acoustic consultants and up to six dB could be added to the measured Leq depending on the tonality content of the noise under consideration. In order to give an objective basis for tonality estimated a DIN norm proposal for tonality evaluations was introduced in 1992. This proposal is compared with two different procedures : the prominece-ratio calculation which was proposed by Bienvenue and Nobile /4/ and the proposal of Ares /5/. The output of the three models is contrasted with subjective tonality judgements. It turns out that the prominence ratio model yields the best agreement with the subjective tonality assessments od the sound set chosen.