| 噪声方向结构的主观评价研究 |
| 摘要点击 812 全文点击 1162 投稿时间：1995-03-01 |
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| 中文关键词 混响 方向结构 吸声 主观评价 |
| 英文关键词 reverberant sound field directioncomposition noise reduction subjective assessment |
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| 中文摘要 |
| 通过对自由场、混响场和介于两者之间的声场以及自由场中不同入射方向等不同的方向性结构下噪声的响度和吵闹度的心理试验研究,得到了不同方向结构噪声的主观感觉差异程度,以及主观感觉所对应的声压级定量差值。在声级完全相同时,主观感觉长混响声场响度要高1—2dB,响度与吵闹度的正相关系数约0.4。该研究为应用广泛的吸声降噪和室内声环境评价提供了理论依据。 |
| 英文摘要 |
| It was found that in a sound field different people Would have different subjective sensation levels,although a same level of real sound pressure was exerted on theal. Psychologipel experiments were carried out on the loudness and noisiness of a noise in a free sound field,a reverberant sound fial aam an intermedinte sound field between them,and a noise comprising different direction components in a free sound field,to give the degree of florence in subjective sensation levels in these cases and the corresponding difference in sound pressure levels. The results show that both loudness and noisiness were higher in a reverberant sound field than in a free sound field,with a distinct degree of about 0.3,correspondding to a sound level divergence of 1—2 dB. There was a positive correlativity of about 0.4 between loudness and noisiness. In a horizontal plane,the dialfort divergence of sensation ocurred at a noise in a wide range of frequency over 2 kHz. Subjective loudness and noisiness were smaller in a rear semiplane that in a front one,with a distinct degree of about 0.6 and 2 dB,respectively. The results would be useful in noise reduction and the environmental impact assessment of indoor noise. |
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