The most easily overlooked in the traditional home theater environment is the acoustic design. We often think that the home theater is also sound-absorbing, and the speakers are placed. The sound is out, but things are not like this, good theater. Environmental design is also very important for the restoration of audio or video, not what we think is "so simple."
Classification and characteristics of room acoustics
First, the methods of indoor acoustics include geometric acoustic methods, statistical acoustic methods, and wave acoustic methods. When the indoor geometrical size is much larger than the acoustic wave wavelength, the geometrical acoustic method can be used to study the early reflected sound distribution to enhance the direct sound and improve the uniformity of the sound field, thereby effectively avoiding the sound defects. The statistical method we are talking about is to study the growth, stability and attenuation process (ie, the reverberation process) of the acoustic energy density under the excitation of continuous sound source from the energy point of view, and give the exact definition of the reverberation time, so that subjective evaluation The combination of standard and acoustic objective quantity provides a scientific basis for indoor acoustic design. When the indoor geometric size is comparable to the acoustic wavelength, the resonance phenomenon is easy to occur, and the sound quality will be chaotic. At this time, we can use the wave acoustic method to study the indoor sound. The positive vibration mode and the generation condition are used to improve the uniformity and spectral characteristics of the sound field in a small space, thereby coordinating the characteristics of the room acoustics and ensuring a reasonable sound propagation mode. When using acoustic materials, we must take into account the advantages and disadvantages of the entire listening environment, and do not use them blindly, otherwise it will be counterproductive. The application of building acoustic materials is to treat the physical conditions and acoustics of indoor acoustic wave transmission to ensure good listening conditions in the room, and to block the noise and interference outside the building, and to create an audio-visual room that meets the indoor learning environment. .
Acoustic design considerations
In the traditional acoustic design, we not only cut the sound bridge of the outside and indoor, but also consider the transmission and reflection of sound in the environment. On the other hand, we must strengthen the sound in the sound transmission. Reflection, so that sound energy is evenly distributed and diffused in the building space, just like the design of our hall or theater, it can ensure that the audience can hear clear and natural sound and loudness in every position. On the other hand, we should pay attention to the sound absorption materials and sound absorption structure to control the reverberation time and the specified frequency characteristics to prevent echo and sound energy concentration. Secondly, in the application of materials, we must also carry out structural reorganization and installation in accordance with strict regulations, and strive to make the acoustic materials do not destroy the original acoustic advantages in application and installation, which can save materials. Therefore, we conduct acoustic model tests during the design phase to predict the effects of the acoustic measures taken.
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