Abstract This study aims to reduce heavy weight impact sound, changing the sound field by applying sound absorbing ceiling. Sound absorption performance is reviewed at the reverberation chamber, and the ceiling is designed to be higher than the sound absorption coefficient of a commercial base trap. As a result of applying this to apartment households, the heavy weight impact sound evaluated using a bang machine was reduced from 4.6 dB at 63Hz to 2.2 dB at 125Hz of 1/1 octave band, and the single number quantity (Li,Fmax,AW) was reduced by 3 dB. When evaluated using a rubber ball, the noise level reduced to 4.9 dB at 63Hz and to 1.8 dB at 125Hz. The single number quantity was reduced by 2 dB. When the sound absorbing ceiling and the bass trap were installed together, there was an additional reduction of 3 dB for a bang machine and 2 dB for the rubber ball. As a result of mode analysis, the sound pressure level reduced at 63–125Hz frequency range, and the uneven phenomenon was alleviated.

中文翻译：

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吸音天花板可减少沉重的地板撞击声

摘要 本研究旨在通过应用吸音天花板来减少重物撞击声，改变声场。在混响室审查吸声性能，天花板设计为高于商业基地陷阱的吸声系数。将此应用于公寓家庭的结果是，使用砰砰机评估的重物撞击声从 63Hz 时的 4.6 dB 降低到 1/1 倍频程的 125Hz 时的 2.2 dB，并且单​​数量（Li、Fmax、AW ) 降低了 3 dB。使用橡皮球进行评估时，噪音水平在 63Hz 时降至 4.9 dB，在 125Hz 时降至 1.8 dB。单数数量减少了 2 dB。当吸音天花板和低音陷阱安装在一起时，砰砰机额外降低了 3 dB，橡胶球额外降低了 2 dB。模态分析结果表明，63-125Hz频率范围内声压级降低，不均匀现象得到缓解。