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I also talk about the small room listening room decoration, welcome everyone to throw bricks.
First of all, I want to state that science and technology are moving forward. The new overall is better than the old one. Although there are such imperfections in the development of new technologies, science and technology are still improving, in the early 1980s. There were a lot of dissatisfaction when the CD was first released, but today the SACD sound is perfect, natural. If you think that antiques are good, then I can't discuss it.
The listening room decoration involves architectural acoustics. It is difficult to find systematic information about this aspect. The general reference to the design of the concert hall and the muffler room is based on several listening rooms designed by me in recent years, including pure flute. Use the simple listening room, give you a brief summary, and then introduce the design of different listening rooms.
The general listening room is mainly based on sound absorption, supplemented by diffusion, or purely sound-absorbing. Do not think that the concert hall is perfect. In fact, the sound of the concert hall is very unclear, and the positioning is not clear.
Because the concert hall wants to make the sound heard by everyone in different positions, it has to use a lot of diffusion to improve the sound pressure. It causes reverberation, the delay is too long, and the impact is clear. This person who has worked in the concert hall understands.
Don't be afraid of a lot of sound absorption. The more the actual sound absorption, the clearer the sound. I don't believe that the sound is dry when the sound is louder, and the sound is clear when it is clear. In fact, the transient distortion of the sound equipment is too large, and the resolution rate is too low. The details of the music cannot be reproduced. Suppose you are in a quiet outdoor open space. This is almost no diffusion, but completely absorbed. When you hear the sound of the piano, will the sound of the flute be dry? Actually, it is very natural and harmonious. However, in a large number of sound-absorbing listening rooms, most audio equipment will be exposed to such imperfections or even inability to listen. Welcome to China Home Theater Network
Let me introduce you to the main concept of the small room listening room decoration.
1, frequency response, the general music hall design requirements range is 125Hz-4KHz. Listening room decoration high requirements (63Hz-8KHz) (current state of the art). 2, T60, refers to the reverb, a sound pronounced - 60dB time (S), diffusion and absorption are a pair of contradictions, diffusion increases T60, that is, the resolution is reduced, the absorption is reduced, the T60 sound is light, but clear. 3. Delay, refers to the time when the sound is reflected back. (mS). For the clarity of the sound, the general requirement is less than 25mS.
The Symphony Hall T60 is generally 2.0 (the old concert hall 2.2-2.4, the new 1.6-2.0), the bass is increased by 10%. The opera house is generally 1.8, mainly for listening to the lyrics.
With the improvement of the design level, the newly built concert hall is generally shorter than the old one, and the north is shorter than the south. The natural recording studio T60 is about 1.3, which is much clearer than the sound of the concert hall. The small room decoration T60 is technically impossible to reach. 0.6 or more, due to insufficient sound absorption, causing serious frequency imbalance.
Why the proliferation of small rooms is useless, but it creates imbalance and sounds weird. Generally, a house with a home size of less than 100 cubic meters cannot reach the balance of the bass by diffusion. Generally speaking, it is necessary to spread the low frequency, at least a quarter wavelength, 50 Hz. Wave, which requires a diffuser plate with a tooth length of 1.7 meters, can't be renovated at home. If you need a wavelength of one-half of the wavelength, then you can't handle it. So the low frequency can only solve the frequency response by sound absorption. The flatness, generally 100 cubic meters of the house reaches plus or minus 2dB, then T60 is generally lower than 0.55, according to the characteristics of the concert hall, the high frequency T60 can not be higher than the low frequency.
If the high frequency is excessively diffused, the T60 is increased, and the high frequency T60 is higher than the low frequency T60, which is just the opposite of the low frequency T60 of the Symphony Hall is higher than the high frequency T60.
The basic idea of ​​the design of the fever listening room is to reproduce the recordings. The recordings already have the reverberation of the recording studio, the concert hall and the opera house. We do not need to be artificial.
The effect of the sound field on the acoustic effect is great. The same speaker is placed in a different room, the effect is different, just as the same band plays in different concert halls, the effect is different. In other words, a certain speaker is the best under certain conditions. In other cases, it may be bad.
The sound we hear is not only direct, but also the reflection of the walls of the room. The effect of the reflected sound on the sense of hearing is very significant. We all have this experience: two people talk while walking, enter the room through the corridor from the yard, you will feel the voice of this person has changed. The reason for this is because the reflections in the yard, the corridor and the room are different. In addition to the direct sound from the recorded instruments, we also recorded the reflections of the theater. However, due to the large theater, the reflection sound came later. When you play in a small room, the first reflection you hear is not the reflection of the theater recorded in the source, but the wall of the replay room. The sound of the room you hear is mixed into the show. went. In order to actually hear the situation in the source of the program, the reflected sound of the room must be substantially eliminated below the auditory masking threshold. To do this, it is necessary to set the sound absorbing surface in a practical way. The acoustic treatment of the room must be personalized. There is no uniform mode. The basic method is to change the reflective surface into a sound-absorbing surface. For example, glass is a sound-reflecting surface, but as long as it is replaced by perforated glass, it becomes a sound-absorbing surface.
This article is reproduced in the "big trumpet" zhou