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Conference_programme: 17.1 - Façade Insulation and protection against outdoor noise

Lecture: Frequency spectra discrimination of broadband stimuli

Author(s): Chmelík Vojtech, Rychtáriková Monika, Muellner Herbert, Jambrošić Kristian, Zelem Lukáš, Benklewski Jakub, Glorieux Christ, Exel Rudolph

The sensitivity of human hearing is one of the important aspects determining daily living and acoustic comfort. In this paper, the ability of people to discriminate between frequency spectra obtained by filtering out different frequency bands from the spectrum of broadband noise stimuli was tested. Subjective laboratory listening tests were designed and optimized, using the three-alternative forced choice method. The width of the frequency gaps was varied in between 1, 2, 3, 8, 12 and 16 semitones, and reductions 0.3, 0.5, 1, 2, 3, 5, 10 and 20dB were applied. The gaps were created symmetrically (on a logarithmic scale) around two central frequencies: 125Hz and 2000Hz. Altogether 35 subjects were tested. This paper presents the analysis of the obtained results.

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Corresponding author

Name: Dr Vojtech Chmelik

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Country: Slovakia (Slovak Republic)