Detection of sound insulation effect of sound insulation door.

The core inspection project of sound-proof door includes five technical dimensions:

the measurement of air sound insulation capacity to evaluate the blocking ability of door body to air-borne noise;

The attenuation test of structural sound transmission verifies the inhibitory effect of the door on solid vibration transmission;

The tightness can be detected by the tightness test to confirm the tightness of the joint; The analysis of material density and uniformity ensures the quality stability of components;

Installation quality inspection involves the measurement of verticality and closing accuracy of the frame.

Among them, the sound insulation capacity of air should be tested in the full frequency range of 125-4000Hz according to 1/3 octave and the weighted sound insulation capacity Rw value should be calculated.