Protec Industrial Doors had different types of sound-insulating doors tested in the test laboratory of the accredited institution Peutz. The sound-insulating overhead doors in question were fully assembled, just like the doors used in buildings. Thanks to this testing method, accurate results can be obtained with regard to sound-insulation values of the installed doors in practice. The sound-insulating doors were therefore tested as a complete construction. These doors are suitable for various applications and situations where high demands are placed on sound insulation in order to protect people or the environment.