Do you know how an anechoic chamber is silenced? Let's explain the muffler below

Knowledge point: An anechoic chamber refers to a room without reflection, with sound-absorbing materials with good sound absorption performance laid on the walls of the anechoic chamber, and a sound absorption coefficient of 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 necessarily beneficial without any harm. When testing professional audio products, audio companies usually conduct noise testing in professional soundproof rooms. An anechoic room refers to a room without reflection, with sound-absorbing materials with good sound absorption performance laid on the walls of the anechoic room, and a sound absorption coefficient of over 99%. Therefore, there will be no reflection of sound waves indoors.

An anechoic chamber is an extremely important experimental site in acoustic experiments and noise testing. Its function is to provide a low noise testing environment in a free or semi free field space, and to adopt good sound and vibration isolation devices to avoid interference from the external environment. In the professional audio and lighting industry, it is a specialized place for testing audio equipment such as speakers and speaker units. The sound absorption performance of general sound-absorbing materials is a function of frequency, and the lower the frequency, the worse the sound absorption performance. The high-frequency sound absorption performance of sound-absorbing materials is good. However, the wavelength of high-frequency sound waves is short, and the support and network of the tested object placed in the anechoic chamber scatter the sound waves more.

Silence rooms are used in urban areas for noise control, sound insulation and vibration prevention engineering in civil buildings, air conditioning rooms, garages, exhibition halls, hotels, restaurants, shopping malls, supermarkets, hospitals, office buildings, and other places. Design, construction, and installation of sound effects for buildings such as recording studios, photography studios, performing arts halls, music halls, theaters, cinemas, piano rooms, teaching and research rooms, multifunctional halls, sports halls, and conference rooms. Various types of soundproof doors, soundproof windows, soundproof rooms, soundproof covers, soundproof screens, and other soundproof engineering. Laboratory, sound-absorbing room, sound-absorbing box, simultaneous interpretation room, hearing testing room, and various electronic, electrical, medical, mechanical equipment, power engines, aircraft engines and other ultra quiet and silent laboratory projects.

Comprehensive noise control projects for industrial factories, thermal power plants, computer rooms, air conditioning systems, pump rooms, and other equipment, as well as environmental noise control, sound insulation, noise reduction, and vibration reduction in factory areas. An anechoic chamber is an important tool for our research on acoustics. In fact, the true purpose of its construction is not to create a sound with no return. Its essence is to create a building that approximates a free field space for engineers to study and test the acoustic characteristics of equipment. Such a building requires a considerable investment. Currently, the construction cost of a 20 square meter soundproof room is generally around 400000 yuan, and the larger the space, the higher the cost. Silencers tell everyone that such a testing environment can only be built in first tier large factories with the ability.