在很多大型舞台演出中，真 正震撼我们的并不是场面多宏达，而且现场的渲染力，而音响所发挥的效果则是功不可没的。比较于室外的开放空间，在室内摆放各类音响时，为使其也能达到较好的音质效果，我们不仅要合理摆放不同类型的音响，而且也要学会做一些简单的声学处置。下面为大家介绍几个减少室内音响回音现象的有效处置办法：
In many large-scale stage performances, what really shocks us is not the scene, but the rendering power of the scene, and the effect of sound is indispensable. Compared with the outdoor open space, when placing all kinds of acoustics indoors, in order to achieve better sound quality effect, we should not only reasonably place different types of acoustics, but also learn to do some simple acoustic disposal. Here are some effective solutions to reduce indoor sound echo:
1、铺一块厚实的地毯。地面对声波的反射是为严重的。尽管地毯对低频不大能起效果，但首要要办的事便是设法吸收些高频的反射。在直达声之后头5尘厂(毫秒)或稍后几毫秒形成的早期反射，将会变成直达声的一部分，又因它们多来自同一方向，因而便会让人听到。应当防止让发声纯真的音箱去夹杂着发出些地面反射回来的高频声。又因为不大可能在天花板上加些软衬垫，因此，如果不在地面上铺陈以地毯，便会有两个平行而且反射强的表面，声波就将在地面与天花板之间来回地反射，从而让声响变得难听。
1. Lay a thick carpet. The reflection of sound waves from the ground is very serious. Although the carpet has little effect on low frequencies, the first thing to do is to try to absorb some high-frequency reflections. The early reflections formed in the first 5ms (milliseconds) or a few milliseconds after the direct sound will become part of the direct sound, and they will be heard because they mostly come from the same direction. It should be prevented that the speaker with pure sound should be mixed with some high-frequency sound reflected from the ground. And because it is unlikely to add some soft padding to the ceiling, if you do not lay a carpet on the ground, there will be two parallel and highly reflective surfaces, and the sound waves will be reflected back and forth between the ground and the ceiling, making the sound ugly.
2、在窗户上挂窗布在一些音乐厅中，总是防止装有反射的玻璃。在听音室内，由于各面墙壁都离得很近，因之，玻璃所产生的反射声很简单会让人感到厌烦。可以设法在窗户上挂些可以拉开的窗布，在聆听音乐时便拉上窗布。别的，不要在听音室内摆放带有玻璃前面板的书橱和家俱。
2. Hang window cloth on the window. In some concert halls, reflective glass is always prevented. In the listening room, because the walls are very close, the reflected sound generated by the glass is very simple and boring. You can try to hang some window cloth that can be opened on the window, and pull the window cloth when listening to music. In addition, do not put bookcases and furniture with glass front panel in the listening room.
3、设法破坏平行墙面的反射。平行的墙壁同地面和天花板一样，皆有可能会产生无穷无尽的反射，从而呈现&濒诲辩耻辞;多次回声&谤诲辩耻辞;，让声响变得难听。可以用力拍击双手，如果听到了回声，便说明听音室内有些问题。书架、尤其是乱七八糟随意摆放些书籍的书架，作为声波的分散器，便可以隔断那些平行面的反射，尽管已有好些专门制作的声分散屏出售，但在听音室内摆放几个书架便可以起到相当不错的效果。
3. Try to destroy the reflection of parallel walls. Parallel walls, like the ground and ceiling, may produce endless reflections, presenting "multiple echoes" and making the sound ugly. You can clap your hands hard. If you hear an echo, there are some problems in the listening room. Bookshelves, especially those with random books, can be used as sound wave dispersers to block the reflection of those parallel planes. Although many specially made sound dispersion screens have been sold, placing a few bookshelves in the listening room can achieve quite good results.
4、在高音单元的“镜像反射点”上粘贴些泡沫。除非听音室的天棚犹如教堂那么高大，否则便应在音箱的每一高音单元的“镜像反射点”粘贴些泡沫块。所谓“镜像反射点”指的是这样的点：当将一面镜子摆放在天花板上(或地面)的某个点时，能够从聆听位 置上看到镜中的高音单元。尽管对于天花板的处置不必像对地面的处置那样严格，但能够作适当的处置仍然是很有好处的。当在天花板的镜像反射点贴以厚度不过几个毫米而面积不超过0.1m2的泡沫后，室内的听音环境便已得到了改善。
4, paste some bubbles on the "mirror reflection point" of the treble unit. Unless the ceiling of the listening room is as big as a church, you should paste some foam blocks in the "mirror reflection point" of every sound unit of the loudspeaker. The so-called "mirror reflection point" refers to such a point: when a mirror is placed at a point on the ceiling (or ground), the tweeter in the mirror can be seen from the listening position. Although the disposal of the ceiling does not have to be as strict as the disposal of the floor, it is still beneficial to make appropriate disposal. When the mirror reflection point on the ceiling is pasted with a thickness of several millimeters and the area is no more than 0.1m2, the indoor listening environment has been improved.
5、不能让混响过长。在镜像反射点粘贴些小的泡沫块并不会让听音室有过多的变化。但是，要是粘贴大块的泡沫或是挂上相当厚实的窗布时，便会因为吸声过多而让重放出来的音乐听来有死气沉沉的感觉。薄而轻的吸声材料将能很好地吸收高频，但却对低频不起效果。通常，吸声材料的厚度得大体上同声波的半个波长相当，才会起到吸声的效果。对于10办贬锄的声波来说，波长仅3.4肠尘，因此，因厚度几个厘米的泡沫便可以吸收高频。
5. Don't let the reverberation be too long. Sticking small foam blocks at mirror reflection points will not cause excessive changes in the listening room. However, if you stick a large piece of foam or hang up a very thick window cloth, you will hear the sound of the replayed music because of excessive absorption. Thin and light sound-absorbing materials will be able to absorb high frequencies well, but they will not have an effect on low frequencies. Usually, the thickness of the sound-absorbing material must be roughly equal to half the wavelength of the sound wave to have the effect of sound absorption. As for the sound wave of 10kHz, the wavelength is only 3.4cm, so the foam of several centimeters thick can absorb high frequency.
