The acoustic chamber is not only a special laboratory of acoustic testing, but also an important part of the test system. In fact, it is also one of the acoustic testing equipment. The acoustic performance index directly affects the accuracy of the test. The anechoic room is divided into the whole muffling room and the semi anechoic room. The six sides of the room are all covered with sound absorbing layer, which is called anechoic room. It is called semi anechoic room in the six sides of the room, which only spread on five or four sides. The main function of the anechoic chamber is to provide a free field or half free space for acoustic testing. The sound absorption is the key to ensure the sound performance of the sound field. Most of them are sound absorption and flat plate resonant sound absorption structures with strong sound absorption ability.

The main purpose of the anechoic chamber is to test the sensitivity, frequency response and directivity of the anti noise transmitter and receiver. The frequency range of this transmitter and receiver should ensure that the language communication is clear, generally around 200 to 4000Hz.     

According to the use of anechoic room and original room conditions, the acoustic design indexes are as follows:

(1)the designed anechoic room is a full anechoic room, and the working ground network is required.

(2)sound insulation design to achieve the background noise index.

(3)the design of free sound field by sound absorption design requires that the measurement error is within or below 1dB, or there are special requirements for measuring the direction of sound source.

(4)acoustic design to achieve aerodynamic performance.

(5)vibration isolation design to achieve low frequency vibration around isolated anechoic chamber.

Use:

● Automobiles, electromechanical, or electroacoustic industries

● Acoustic detection of all products, anechoic chamber, semi anechoic room, mobile phone or other communication products, anechoic chamber and silencer.