Digital Equalization of Room Acoustics
Digital Equalization of Room Acoustics
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室内声学数字均衡
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
J. Mourjopoulos
中科院分区：
文献类型：
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作者：
J. Mourjopoulos
数字均衡等信号处理方法理论上可以实现声学混响的减少。然而，在实践中，由于一些客观和主观的原因，这些方法的实现只取得了部分成功。其中两个问题，即均衡器性能对源和接收器位置的依赖性以及对极长滤波器的要求，都得到了解决。提出房间响应的全极点建模可以放宽均衡器滤波器长度要求，并且使用矢量量化可以对在不同源和接收器位置获得的此类响应进行最佳分类。这种分类可以用作空间均衡库，实现在外壳内的各种位置上减少混响；多项测试证实
Signal processing methods such as digital equalization can in theory achieve a reduction in acoustic reverberation. In practice, however, the realization of these methods is only partially successful for a number of objective and subjective reasons. Two of these problems, the dependence of the equalizer performance on the source and receiver positions and the requirement for extremely lengthy filters, are addressed. It is proposed that all pole modeling of room responses can relax the equalizer filter length requirement, and the use of vector quantization can optimally classify such responses, obtained at different source and receiver positions. Such classification can be used as a spatial equalization library, achieving reduction in reverberation over a wide range of positions within an enclosure; as was confirmed by a number of tests