An anechoic chamber is a space that does not reflect sound. The walls of the anechoic chamber will be paved with sound-absorbing materials with good sound-absorbing properties. Therefore, there will be no reflection of sound waves in the room. The anechoic chamber is a laboratory specially used to test the direct sound of speakers, speaker units, earphones, etc. It can eliminate the interference of echoes in the environment and completely test the characteristics of the entire sound unit. The sound-absorbing material used in the anechoic chamber requires a sound absorption coefficient greater than 0.99. Generally, a gradient absorbing layer is used, and wedge or conical structures are commonly used. Glass wool is used as sound-absorbing material, and soft foam is also used. For example, in a 10×10×10m laboratory, a 1m-long sound-absorbing wedge is laid on each side, and its low-frequency cut-off frequency can reach 50Hz. When testing in an anechoic chamber, the object or sound source to be tested is placed on the central nylon mesh or steel mesh. Due to the limited weight that this type of mesh can bear, only light-weight and small-volume sound sources can be tested.
Ordinary Anechoic Room
Install corrugated sponge and microporous sound-absorbing metal plates in ordinary anechoic chambers, and the sound insulation effect can reach 40-20dB.
Semi-Professional Anechoic Room
The 5 sides of the room (except the floor) are covered with wedge-shaped sound-absorbing sponge or glass wool.
Full Professional Anechoic Room
The 6 sides of the room (including the floor, which is suspended in half with steel wire mesh) are covered with wedge-shaped sound-absorbing sponge or glass wool.
Post time: Jun-28-2023