Guangzhou Leisound Electronic Co.,Ltd
广州安语电子有限公司
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leisound@leisound.com
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Sound equipment replay sound is good or bad, and listen to the environment of architectural acoustics characteristics have a very close relationship, to make the sound system to play the highest performance, must listen to the room for some acoustical processing.
For the listening room of the architectural acoustic characteristics, there are four aspects to be considered, ① reverberation time, ② reverberation attenuation of the diffusion characteristics, ③ room frequency characteristics, ④ ambient noise level.
The acoustic characteristics of the room are different, and the reflection and absorption of the different objects are different. Therefore, the work of improving the acoustic environment and improving the acoustic defects is very complicated. Whenever possible, it is best to avoid any size on either side of the room, or twice the other side of the room, that is, the square or aspect ratio is twice the room, because this proportion of the room will produce standing waves, low frequency acoustic resonance , Resulting in sound staining.
The room from the walls, ceilings, floors, furniture and personal repeated reflection of the formation of the voice of the existence of the gradual decline of the phenomenon, known as reverberation (reverberation, also known as mixed echo). It is echo (echo) is different from the echo is not a smooth attenuation but the sound of a sudden return. For the most important indicators of indoor acoustics, the first is the reverberation time, which is the time required for the sound energy to decay to the original strength of one millionth (60dB). For a determined room, the reverberation time is mainly determined In sound absorption treatment. For Hi-Fi listening room reverberation time, desirable 0.4 to 0.5 seconds. Reverberation time can make the music fullness, full voice, reverberation longer sound more lively and lively, but too long sound is easy to vague, voice clarity decline, lack of intensity and rhythm of the music, reverberation time is too short The sound is dry and hard, lack of angry, no reverberation of the sound (such as outdoor) often feel stiff.
The room of the proliferation of good characteristics, the sound of the attenuation of smooth, indoor sound everywhere feel uniform. Any convex surface has the ability to diffuse sound waves, including the slope, surface and convex surface, when the need to spread the acoustic frequency of the convex surface size, can be used to deal with diffusion plate. Audio Technology Super Forum
When for some reason the frequency of a certain frequency is strengthened or weakened, it will destroy the room sound uniformity, this phenomenon we call sound color (sound ation). For example, standing wave energy can change the original characteristics of the sound, in some frequency band peak, the improvement is the indoor items placed to avoid symmetry.
Large space listening room not only for low-frequency extension of help, but also make the sound feel more relaxed, more alive and alive. China is generally used as a listening room room area of about 14m2, about 2.8m high, the volume of about 40m3. In this room, as long as the acoustic processing properly, should be able to have a better listening effect. Since the wavelength of the sound below 100Hz is greater than 3.4m, and the size of the room in the same order of magnitude, so in its space can only produce a few resonant frequency, low frequency sound interference less, it sounds naturally rounded. However, the wavelength of the high-frequency sound is much smaller than the space size, will produce a large number of standing waves in the room, in the standing wave mutual interference, the room in the 100 ~ 500Hz acoustic characteristics are generally poor, and this band of audio energy High, so pay attention to make appropriate treatment.
The room is in the room between the walls, due to the multi-reflection of the sound generated by standing waves (standing waves), when the standing wave can produce resonance, the frequency depends on the distance between the walls, we can see the room is actually a resonator. The room where the sound waves are the most. It is the corner of the back wall of the speaker, it will reflect the dirty bass, this effect is called room rumble (room booming). This low frequency standing wave is a common acoustic defect that causes the bass clarity to fall and needs to be handled with care. A good way to control standing wave reflection is to use the bookshelves filled with books, the irregular shape of the books and the less powerful sound absorption, so that the sound waves can be scattered, thereby reducing the impact of sound reflection. Marble and granite floor and floor glass is the first choice for modern home decoration, but it is the enemy of sound effects. Often lead to the sound of the noise noisy, the improvement is in front of the speaker placed in the appropriate size of the carpet and in front of the glass with thick curtains.
The ambient noise level refers to the noise level of the noise when there is no sound source in the room. If the ambient noise is too high, it can adopt the method of sound insulation and vibration isolation, or lay a certain sound absorbing material in the room. For the current room of the sound insulation is usually not enough, and the whole room to the solid wall of the best sound insulation, doors, windows, the sound of the weakest, so the room to determine the sound quality of the important factors are doors and windows
Living room in the living room for the listening room is not ideal, because the general living room is open space, walkway caused by space asymmetry, coupled with the loss of floor space caused by the extension of the space so that the sound reflection is not good control, resulting in sound shift. As long as there is not much furniture furnishings, the bedroom for the listening room is a better choice, because the closed space is easy to grasp the sound reflection problem.