Why should the room absorb sound?Anshun Bar Audio Vendor

　　What would happen if there were no sound absorbers in the room, and the room itself did not absorb sound? That is, once the sound is emitted, it will continue to reflect, and the sounds emitted before and after will be mixed together. For example, when a language broadcast is played in such a room, when the second sound appears, the first sound is still ringing, and when the third word appears, the sound of the first two words is still ringing at the same time... ., coupled with resonating sounds of different frequencies, so whether it is language or music, we will be completely indistinguishable (except for the first sound), let alone appreciate it, all we hear is a noise! Of course, these are only imaginations in an extreme case. In fact, since walls, air, and the human body all absorb sound energy, the reflected sound always fades away. However, through such imagination, we can further understand the importance of sound absorption in the room.

　　Thankfully we don't live in an environment that doesn't absorb sound at all, otherwise it would be unimaginable! Although real rooms can absorb some sound energy, it is often far from ideal. It would be a pity if you bought a good audio equipment and produced the sound of standard Hi-Fi, but due to the poor sound absorption characteristics of the audio room, the reverberation and resonance that should not have been there would seriously distort the original sound. ah! Therefore, the real enthusiasts should also be the pursuit of reasonable sound absorption in the room.

　　Generally speaking, the place where we live is mostly surrounded by brick walls. This traditional brick wall, especially after being painted, is very reflective for high, medium and low frequencies, especially high frequencies; therefore, "proper" sound absorption becomes the first priority. The so-called appropriate is not to go too far, if the sound is sucked dry and without charm, it will be counterproductive. In principle, if you want to pursue the true original sound during playback, you should not be disturbed by the reflected sound, but only listen to the direct sound; this requires a complete sound absorption environment, which is not conducive to the general living environment. Generally speaking, it is often impossible, so it is usually a part of the sound absorption of the room, and some reflected sound is reserved for use.

　　Usually, the number of sound-absorbing objects in a room is always more or less, which means that the best listening environment is generated in a cluttered room. Let’s talk about this kind of indefinite sound-absorbing treatment. Law. Hanging sound-absorbing materials on the surrounding walls: various soft materials, such as cotton, linen, silk, wool, or other types of fiber fabrics, wall hangings, etc. are all available. For example, hang a 1mm thick velvet (or other similar texture) curtain fabric on the wall, it can only absorb about 1/5 of the sound energy (in the mid and high frequency bands, the low frequency is worse), and the rest is reflected out, so that It can't eliminate the resonance of low frequency; the solution is: do not stick the curtain cloth close to the wall, leave a distance of about 10cm (add other sound-absorbing objects in the gap); discount the curtain cloth or hang it in multiple layers, and then use the low-frequency sound absorption A large soft sofa with good characteristics can achieve a certain effect. Generally, in a playback environment with poor sound absorption characteristics, it is not suitable to use that kind of hardwood sofa.

　　The sound absorption characteristics of various materials will be different. It is best to use them selectively. The goal is to achieve symmetrical and balanced absorption of high, medium and low frequencies. Sometimes, you can also combine the characteristics and hobbies of your own equipment to perform unbalanced absorption. If someone prefers bass, but the output power of the amplifier used is not large enough, or the low-frequency response of the speaker is not good, it can be appropriately reduced. Absorption of low frequencies. Although this is not a high-fidelity option in the general sense, it can still be used when the audio equipment itself has some defects.

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