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海洋音像总公司录音棚主要录制地方戏曲和通俗歌曲,声学设计是采用目前盛行的多声道强吸声录音方式,而在同期或后期制作时用人工混响.该棚由原八楼会议厅改装,平面图如图1所示.录音棚净高只有1.9米,控制室净高2.2米.室内原设计顶棚用穿孔板吸声结构,四壁及柱子表面贴厚绒毡,地面铺以地毯.对该录音棚进行初步声学性能测试和分析后发现,声场的中频段(250～1000Hz)混响时间过长,而2000Hz 以上频段呈明显下降趋势,这种声场特性导致主观试听时声音发闷,无法正常使用.后发现这是由于吸声顶棚安装施工时未按要求进行所致.随即我们提出了改建措施,其中包
The recording studio of Ocean Audio and Video Corporation mainly records local operas and popular songs. The acoustic design is based on the prevailing multi-channel sound absorption recording method, and artificial reverberation is used during the same period or post-production. The shed is from the original 8th floor conference hall. Refit, plan view shown in Figure 1. Recording studio net height of only 1.9 meters, the control room net height of 2.2 meters. The original design of the ceiling with a perforated sound-absorbing structure, four walls and pillars surface thick felt, carpet floor. After preliminary acoustic performance testing and analysis of the recording studio, it was found that the reverberation time of the mid-range (250 to 1000 Hz) of the sound field is too long, and the frequency band above 2000 Hz shows a declining trend. This sound field characteristic causes the sound to be bored during the subjective audition. I could not use it normally. It was found that this was caused by the failure to perform the required requirements during the installation of the sound-absorbing ceiling. Immediately afterwards, we proposed reconstruction measures, including