Final Thesis

Methods for the evaluation of rotational-speed dependent noises with spectro-temporal patterns

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Basic Information



Master Thesis of Becker, Henri

Rotational-speed dependent noises with modulation and prominent temporal stmctures are often perceived as annoying. If the sound of a technical product exhibits these characteristics, it is most likely associated with poor quality. In the scope of this master thesis the typical characteristics of such noise phenomena will be investigated in time and ti'equency domain using established methods (e. g., Modulation Spectrum, Relative Approach). Noise variants with differently pronounced patterns and modulation will be generated by systematically manipulating the source. These sounds will be evaluated in listening tests with regard to a quality criterion. FurthelIDore, based on the results of the listening tests, analysis methods shall be presented as the basis for an instrumental assessment of the interesting noise phenomena. ,-