The sound insulation standards of anechoic chamber doors often need to meet very high requirements, since the anechoic chamber itself is designed to create an environment with virtually no reflections. As an important channel connecting the outside world and the inside of the anechoic chamber, the anechoic chamber door must be able to effectively isolate external noise to keep the acoustic performance of the anechoic chamber unaffected.

Here are some common standards and characteristics for anechoic chamber doors:

Materials of construction:
High-precision cold-rolled steel plates are used to make the door body.
The cavity of the door body is filled with sound insulation material, and the bulk density of the sound insulation material is usually controlled between 50 and 100kg/m³.
Use rubber strips or other sealing materials around the door to ensure the door's tightness.

Sound insulation performance:
The sound insulation index is usually divided into several levels, such as 30dB, 35dB, 40dB, 45dB, etc.
For anechoic chamber doors, a higher sound insulation index is usually required to ensure that outside noise does not significantly interfere with the acoustic testing within the anechoic chamber.

Other features:
Doors need to have good sealing and opening flexibility.
The door structure should be able to withstand certain temperature changes and aerodynamic loads.
There may also be a design for observation windows, but it is necessary to ensure that the observation windows also have good sound insulation properties.

National standards:
Depending on the source, the requirement for interior soundproof doors is usually to withstand at least 20 decibels of noise.

The sound insulation performance of soundproof doors may be divided into different levels. For example, 25-30dB(A) is suitable for general environments, and 30-35dB(A) is suitable for environments with higher sound insulation requirements.

The sound insulation standards for anechoic chamber doors are quite strict, and a sound insulation index of more than 40dB is usually required to meet the requirements of an anechoic chamber. Specific values may vary depending on different application scenarios and design standards. For specific information, please refer to the latest national standards or industry guidelines.