自動車交通騒音の評価方法に関する基礎的研究(II) : 日常生活に及ぼす影響について

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  • The Fundamental Study on the Rating Method of Traffic Noise(II) : On the Influence on the Daily Life
  • 自動車交通騒音の評価方法に関する基礎的研究-2-日常生活におよぼす影響について
  • ジドウシャ コウツウ ソウオン ノ ヒョウカ ホウホウ ニ カンスル キソテキ ケンキュウ 2 ニチジョウ セイカツ ニ オヨボス エイキョウ ニ ツイテ

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Recently, the influence on schools, hospitals and residences by the traffic noise has become a serious social problem with the increase of the amount of traffic on the roads. This report is about an investigation of the estimation method which shows the relationship between physical properties and influences in daily life by traffic noise. A social survey in the vicinity of traffic roads was performed. The following results were obtained. 1) In residences in the vicinity of traffic roads in the daytime, the median of sound level corresponding to "little annoying" is 52 dB(A) and the upper limit of 90% range is 59 dB(A)(Fig. 1), NNI is 45(Fig. 6), NRN is 57(Fig. 8) and Leq is 52 dB(A)(Fig. 9). It is considered that traffic noise should be reduced to less than these values at least in residences in daytime. 2) The NRN value showing that traffic noise in rooms is judged to be quiet is about 30(Fig. 8). This almost agrees with the NRN criterion for conference rooms, reading rooms and bedrooms. 3) The dB(A), NNI, NRN, Leq and SIL can be used for the measurement of influences due to traffic noise, but the relationships between these values and the noise judgement show regression lines with almost equal slope and with the variance of the data. Therefore, it is considered that the out line of the measurement of traffic noise can be observed by only dB(A) median. 4) Influences on daily life due to traffic noise can be estimated by applying the sound levels measured during the five minutes when the traffic volume is large and almost constant, from 10:00 to 16:00 except for 12:003:00, to Figs. 1-5.

収録刊行物

  • 日本音響学会誌

    日本音響学会誌 28 (5), 235-240, 1972

    一般社団法人 日本音響学会

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