How to improve the sound effects of private cinema

(1) outstanding sound insulation

There are two reasons for putting the noise above the first point.

The first thing is to block out other noises that obstruct the sound. When performing in concert halls, the doors and windows should be locked, and the sound absorption and closing function of the doors and windows themselves are very good, and then prevent the outside sound from stringing in, the same applies to private studios.

The two is to complete the same volume as the original sound. If the sound from the outside strings in, to listen to the playback of the weak sound must be amplified volume, then the volume of the original sound is not the same, the music embodies the deep thought or insect sounds will be greatly exaggerated. If sound insulation is not good, at home use often afraid of sound too loud to spread out to disturb neighbors, and can only turn down the volume, then the exciting emotional and dynamic greater music role will be greatly reduced. It is difficult to complete the minimum condition of the original sound, without separating the sound from the inside.

(two) moderate reverberation.

The so-called moderate reverberation refers to the period from the onset of the sound to the disappearance, not too long and not too short. A room with too short reverberation time is called a dead room; a room with long reverberation time is called a living room. The word "dead or alive" is directly translated from English, and the original word is very general. In rooms with more open, cotton-fabric bedrooms, sound-absorbing ceilings and many windows, the sounds heard are drier, less rounded, and less interested in music, the result of the "dead" room; in places like bathrooms, storerooms and caves, the walls are hard or microporous, and there are no other sound-absorbing materials. The sound continues, the reverberation time is very long, and the noise is too loud. Before the second sound came out, the first sound had not disappeared, and the music was completely out of shape and could not preserve its original flavor. Appropriate reverberation is needed: the tone is rounded, the sound image is clear in front, and the reverberation volume is appropriate even when the volume is small, so the sound will not be absorbed from the beginning. The reverberation requirements of rooms of different sizes and uses are different. Generally speaking, the lower the frequency, the shorter the reverberation time. Actually, the reverberation time of the bass in a good private studio is shorter than that of the tenor, that is, the sound absorption of the bass is stronger. Strengthens the low sound absorption ability, the wood is absorbs the low voice the good material.

(three) elimination of standing waves, parallel surfaces, reflection and sound accumulation.

Private studios should pay special attention when setting up their seats. The auditorium is close to the sound source, and the direct sound is stronger than the reflected sound. The frequency response will be smooth. And many room standards are not very big, speakers and sofas are often placed against both ends of the wall, to do the above requirements are more difficult, at this time, the wall should be stronger to absorb sound, or the shape of uneven, but also conducive to weakening the standing wave effect. If the room standard is large, the frequency of standing wave will be reduced to less than a few tens of Hz, and the effect on hearing will be small. There is also a long, wide and high standard share of the house, so that it is not integral to each other. The enhancement of low sound absorption is also helpful to weaken the standing wave effect.

As for the specific standing wave frequencies in the room, the frequency can be absorbed by the consensus sound box. This method is more professional, according to the practice measured room standing wave frequency, planning a special standard consensus sound box to absorb these frequencies. The space made up of perforated panels and rear keels in the house decoration is also a common sound absorber, useful for absorbing specific frequencies.

Parallel surface reflection refers to the reflection of sound between two rigid parallel planes. The interval between the two parallel planes is smaller than the standard of the parallel plane itself, and the sound can not be absorbed, and can not be dispersed, eventually there will be harmful sounds like the bird's flapping wings. There are not many occasions when you can hear the clap and listen to the clap. In general, the result of this echo is the distortion of the sound and the vagueness of the sound. This harmful sound can hardly be improved in any good way, so attention must be paid to the construction and selection of private studios to prevent the presentation of this structure.

If the private AV room has parabolic ceiling or arc wall, there may be sound accumulation. In the gathering area, the sound is strengthened, and other localities appear thin, and the entire sound field becomes uneven. This situation is not likely to occur in general household dwellings, but it needs to be prevented when small public places are used for playback. Otherwise, the auditorium is beautifully arranged, but the audiences in different directions have heard different sound results.

Anyway, it's better not to listen too empty. The biggest problem with this kind of space is that the echo time is too long, making the music not only sound too loud, but also ambiguous. More furniture can be placed in the listening area, which helps to absorb and disperse sound waves, such as sofas can buy cloth or leather sofas, their appearance and weight have a good sound absorption; wall can also be placed around a variety of cabinets, such as record cabinets and bookcases, sundry cabinets, etc., these cabinets also have absorption and share The function of scattered sound. In addition, the floor can be placed a thick carpet or wooden tea table (preferably not glass, because glass lubrication surface can reflect sound waves very strong). In addition to the above sundries, the wall can also hang some paintings or protruding decoration, these items are also conducive to sound absorption and dispersion. The above points will surely greatly enhance the sound function of private AV rooms.