ACOUSTIC PERFORMANCE

(UNI EN ISO 10077/1)

To calculate the soundproofing power of a door, it is necessary to refer to the International Standard ISO 140/3, which provides for the use of a double reverberation chamber.

The frame is installed on the partition wall of two acoustically isolated chambers of normalised size; A sound wave generator is installed in the chamber corresponding to the external façade of the door, while a phonometer (i.e. an instrument capable of measuring the intensity of the sound waves emitted in the other chamber) is installed in the other chamber, corresponding to the internal façade of the door.

The difference between the acoustic intensity produced at different frequencies and the measured one defines the soundproofing power of the door under test in dB. These results are then interpolated and evaluated according to EN ISO 717-1 norm.