Abstract
Sound masking can reduce the distraction due to ambient sounds in open-plan offices. This paper compares a typical masking sound with a slope of -5 dB per octave to a steady-state signal with the spectrum of the disturbing speech signal. Subjects had to complete a number recall task and a questionnaire in a laboratory experiment. The sound conditions with the spectrally-matched noise resulted in similar error rates at 3 dB higher speech-to-noise ratios as compared to the standard noise. Using a speech-shaped steady-state noise as masking sound could reduce the effect of distracting speech in the work place more efficiently.
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