The difference between anechoic chamber and silent room

Anechoic chambers and silent rooms are both devices used to reduce noise and sound transmission, but they have some differences in design and function:

Anechoic chamber:

Anechoic chamber is usually a closed space covered with sound-absorbing materials, such as sound-absorbing cotton, foam, acoustic wedge, etc., to absorb sound waves and reduce noise transmission.
Anechoic chambers are mainly used to control and reduce the reflection, propagation and absorption of sound and simulate free sound fields. They are often used in laboratories, factories and other environments that require noise reduction.

Anechoic chambers are usually designed as closed spaces to ensure that sound does not enter from the outside, while also controlling the propagation and reflection of internal sounds to achieve anechoic effects.

Silent room:

Silent room is a room or device used to isolate external noise and keep the internal environment quiet.
Silent rooms usually have a tighter structure and sound insulation performance, which can effectively isolate the interference from external noise and keep the internal environment quiet.
Silent rooms are generally used in audio recording studios, hearing test rooms and other places that require a quiet environment. They are designed to create a quiet space inside with almost no external interference.

Anechoic rooms are mainly used to control and reduce sound transmission, while silent rooms focus more on creating a quiet atmosphere in the internal environment. The anechoic room not only needs to have good sound insulation effect, but also needs to have sound absorption function. The construction requirements of the anechoic room are higher, and the cost is generally higher than that of the silent room. The two differ in design and functionality, but both are designed to reduce noise and provide a better acoustic environment.