Research Article
[Retracted] Ecological Adaptability and Application of Traditional Historical Buildings under the Background of Environmental Protection
Table 4
Cave acoustic environment.
| | Transformation of the former | After transformation |
| Background noise (dB) | 27.3∼30.2 | 27.3∼29.4 | Noise when no one speaks (dB) | 24.3∼31.8 | 33.3∼39.5 | Noise when someone is talking (dB) | 24.1∼54.5 | 43.2∼53.1 |
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