Knowledge point: The anechoic chamber refers to a room without reflection. The sound absorbing material with good sound absorption performance is placed on the wall of the anechoic chamber, and the sound absorption coefficient is over 99%.
In modern society, sound is ubiquitous in our lives, and even noise is an indispensable part of human life. The existence of sound is not a blessing and no harm. When testing professional audio products, audio companies usually perform noise tests in professional anechoic chambers. The anechoic chamber refers to a room without reflection. The sound absorbing material with good sound absorption performance is placed on the wall of the anechoic chamber, and the sound absorption coefficient is over 99%. Therefore, there is no reflection of sound waves in the room.
The anechoic chamber is an extremely important experimental site for acoustic experiments and noise testing. Its function is to provide a low-noise test environment with free field or semi-free field space, and take good sound insulation and isolation device to avoid interference from the external environment. In the professional audio and lighting industry, it is a special place for testing audio equipment such as speakers and speaker units. The sound absorption performance of a general sound absorbing material is a function of frequency. The lower the frequency, the worse the sound absorption performance, and the high frequency sound absorption performance of the sound absorbing material is better. However, the wavelength of the high-frequency sound wave is short, and the scattering of the sound wave by the support and the network in which the device to be tested is placed in the muffler chamber is large.
The muffler room is used for noise control and sound insulation and vibration prevention projects in urban areas such as civil buildings, air-conditioned machine rooms, garages, exhibition halls, hotels, restaurants, supermarkets, hospitals, office buildings and other places. Sound design, construction and installation of recording studios, studios, auditoriums, concert halls, theaters, cinemas, piano rooms, teaching and research rooms, multi-purpose halls, gymnasiums, conference rooms, etc. Various sound insulation doors, sound insulation windows, sound insulation rooms, sound insulation enclosures, sound insulation screens and other sound insulation projects. Laboratory, silencer room, speaker, simultaneous interpretation room, hearing detection room and all kinds of electronic, electrical, medical, mechanical equipment, power engine, aircraft engine and other ultra-quiet and soundless laboratory projects.
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