The treatment of the first reflection point is to reduce the influence of interference and make the frequency response flatter. From this point of view, the effect of suction or expansion is the same, the former reduces the reflected sound, and the latter makes the regular reflection become diffuse reflection to all aspects, which are conditions for destroying the reflection, thereby reducing the influence of interference. However, the diffuser does not have any sound absorbing function and does not have any effect on the reverberation time. The use of the sound absorbing panel can shorten the reverberation time. The larger the sound absorption area, the shorter the reverberation time. Therefore, it is better to absorb than to expand.
From the reverberation time, balancing the reverberation time at low, medium, and frequency is more important than blindly shortening the average reverberation time. For example, the standing wave is very strong, and your low frequency reverberation time will be very long. At this time, shortening the mid-high frequency reverberation time will make the sound feel boring. Therefore, whether the listening room is sucked or expanded is determined by how the low frequency is processed. If you can't shorten the low-frequency reverberation time, use the expansion. If you can handle the low frequency, of course, use suction. This is the principle of choice.
Of course, this is for the entire listening room processing. Specifically, the first reflection point, as long as the area of ​​the sound absorption is controlled, does not have a great influence on the reverberation time, so there is no sound at all. Do one thing.
The above text is taken from the "Chengdong Big Head" netizen
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