Measurement of perceived annoyance due to low frequency content in broad spectrum noises
Keywords:Computer music, Fourier transforms, Headphones, MATLAB, Noise generators, Power amplifiers, Audiometric cabin, Broad spectrum noises, Noise signals, Phase spectrum
AbstractThe measurement of perceived annoyance due to low frequency content in broad spectrum noises in presented. Test noises were generated artificially for simple control of desired spectra and levels. Noise generation was done via MATLAB by the Inverse Fast Fourier Transform of a random phase spectrum. The noise signals were sent from the computer through Digital Audio Labs CardDeluxe sound card into a Rotel RA-810A power amplifier, and the sound was binaturally produced via AKG K301xtra circumaural headphones, worn by the subject in the IAC Audiometric cabin. The results show that dBA tends to underestimate annoyance in noise with high LF content.
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