Representative spectrum of road traffic noise.
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概要
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The representative spectrum of traffic noise is expressed in terms of the normalized Aweighted sound pressure level, <I>δL<SUB>n</SUB></I>. Assuming that the traffic noise annoyance is measured by the time-average sound level, the dependence of <I>δL<SUB>n</SUB></I>upon the traffic speed and the percentage of heavy vehicles has been derived. For traffic without heavy vehicles, an increase in traffic speed causes <I>δL<SUB>n</SUB></I> to decrease at low frequencies. The presence of heavy vehicles destroys the dependence of <I>δL<SUB>n</SUB></I> upon the traffic speed and may increase the value of<I>δL<SUB>n</SUB></I> a few decibels at low frequencies.
- 一般社団法人 日本音響学会の論文
一般社団法人 日本音響学会 | 論文
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