Conference paper Open Access

Frequency Spectra Discrimination of Broadband Stimuli

Vojtech Chmelík; Monika Rychtáriková; Herbert Muellner; Kristian Jambrošić; Lukáš Zelem; Jakub Benklewski; Christ Glorieux; Rudolf Exel

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  threealternative forced choice method. The width of the frequency gaps was varied in between 1, 2, 4, 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 39 subjects were tested. 

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