Article,

Annoyance due to low frequency noise and the use of the dba scale

, and .
Journal of Sound and Vibration, (1988)

Abstract

A laboratory experiment was carried out to evaluate the relative annoyance of a low frequency noise and reference noises at the same dB(A) levels. Four continuous fan noises centered at 80, 250, 500 and 1000 Hz were used as exposure noises. A total of 98 test subjects were exposed for 4 × 30 min periods to two of the exposure noises at two noise levels, while studying. Questionnaires were subsequently used to evaluate annoyance at noise levels between 40 and 70 dB(A). The results indicate that the low frequency noise is more annoying than the reference noises at levels over 40 dB(A). The set of equal-annoyance curves obtained in this study showed that the dB(A) unit underestimated annoyance for a broadband continuous low frequency noise by 3 dB for levels around 65 dB(Lin) and by 6 dB for levels around 70 dB(Lin).

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