本帖最后由 交响无际 于 2022-9-22 19:32 编辑
收到,我去看看这个视频,谢谢
关于混响时间的参考建议标准是EBU tech 3276 page6这个区间范围
https://tech.ebu.ch/docs/tech/tech3276.pdf
一般常见的混响时间的声学测试结果,表现形式是这样的
在REW里面就直接用RT60这个界面,打开数据表,查看各频率的T30或Topt数值,就行了
主要关注的是,50Hz~100Hz的超低频混响时间能压到多低,对于小房间,这也是最轰头、超低频轰轰轰,最难处理的,能压到400~500毫秒以下,低频听起来就比较干净,收得比较快了
在把低频混响时间降下来的情况下,中高频的混响时间留得越多越好,要是能留到300毫秒左右,就非常理想了
至于waterfall瀑布图和Spectrogram火焰图,只是比较直观形象的看到各频段的消散情况,从而发现房间模式问题,比如某些频率,明显比旁边的频率,消散得慢很多
Waterfall is good for spotting room resonances. Waterfall analysis shows you the decay time of audio at different frequencies.
The decay time shows how fast sound disappears after the loud- speaker has stopped playing.
Room resonances (room modes) can cause certain notes to ‘ring’ for a long time in a room. In a typical room, bass notes can resonate for up to half a second. At high frequencies you can experience ‘flutter’ echo between two parallel hard surfaces. This is the annoying ’ping’ that you can hear after you clap your hands, for example.
Flutter echo and room mode resonances both lengthen the decay of sound in a room, and are visible in a waterfall plot. You can see the frequency of a resonance and how slow it decays relative to other frequencies.
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