Doors are divided into different noise insulation classes. The requirements for noise insulating doors usually depend on the location and the corresponding specifications of the user.

For example, noise insulation doors are used to have a separation between noisy (production) and low-noise (office) areas; the installation of doors with a high sound insulation value also plays an important role in test and measuring rooms.

WENDT maufactures, among others, noise protection doors with a proven sound insulation index of 49 and 51 dB.