How to solve the acoustic problem of private cinema and K song
[Home Theater Network HDAV.com.cn] Private home theater is a private space where people enjoy life and experience the entertainment atmosphere at home. In actual life, many people have designed this private space as a multi-functional audio-visual entertainment room; it is a combination of watching movies, listening to music, singing karaoke, and game entertainment. In this movie, K-song is big. Most people choose the combination, which will cause many people to ask questions. The KTV room and the movie room are different in acoustic characteristics, and the two functions are combined in the same private theater, and the acoustic effect is not required. Conflicts? How do private homes in the country solve the acoustic problem?
First, the basic requirements of the acoustics of private schools
The acoustic design of private cinemas needs to meet objective technical indicators and subjective technical indicators;
Subjective technical indicators include an acoustic evaluation section:
1, no obvious acoustic defects
2, accurate tone reduction
3, balanced sound
4, clear language dialogue
5, clear music playing
6, accurate sound image positioning
7, the real sense of space surround
8, a vivid sense of presence
The following points in the objective indicators are critical:
First, the background noise does not exceed 35dB (A), including under the normal operation of air conditioning equipment, ventilation equipment and projection equipment.
Second, the air sound insulation requires that when the sound source emits 90dB (A) or more of pink noise in a private home theater, the sound pressure level difference from the adjacent sensitive room (horizontal and vertical) is not less than 45dB (A).
Third, the reverberation time of each frequency band follows a certain index, less than 200 square meters of room, the reverberation time is controlled between 0.15-0.35 seconds. The reverberation time frequency characteristics of each frequency band should be within the standard range, the intermediate frequency requirement is straight, the low frequency can be slightly higher, and the high frequency can be slightly lower, but should not exceed the upper and lower limits.
Fourth, during normal screening, the difference between the maximum and minimum octave sound pressure levels in the range of 100Hz-4000Hz in the viewing area should not exceed 6dB, and the difference between the maximum value and the average value should not exceed 3dB.
Fifth, in terms of optics, the exterior finish material, texture and color are elegant, and under the premise of meeting the principle, the user's preference for color is met, which meets the user's psychological requirements. The color tone of the interior decoration should meet the audio-visual needs of private home theaters and should not affect the effect of viewing. The color of the main body can be dark or gray, and it is not suitable to choose light or white.
Guangzhou Tianyi Electronics Co., Ltd. aims to build the first brand of China's audio “three highs†and strives to position its products on the “three highs†level of “high qualityâ€, “high technology†and “high tasteâ€. Science and technology plant, quality plant, service plant. Always adhere to standardization, standardization, quality, humanization, scale! To provide our professional audio users with more stable, more reliable, more advanced, more durable, better listening, more professional audio technology.
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