1、Product introduction

It is used to measure the air sound insulation of doors, Windows, curtain walls, wall materials and components, and the sound insulation of plate hitting.

2、standard of execution

GB/T8485-2008《 The graduation and test method for airborne sound insulating properties of windowsand doors 》

GB/T 50121-2005《rating standard of sound insulation in buildings 》

GB/T19889-2005

3、Main technical parameters

1. The volume of each sound chamber and sound receiving chamber is ≥50m, and the sound field distribution in the room is relatively uniform to avoid strong standing waves;

2. Background noise of sound receiving room: ≤20dB(A)

3. The maximum sound insulation quantity that can be measured in the sound receiving room: Rw≥60dB (in this case, the door with sound insulation performance of the highest level 6 can be measured

Window Rw=45dB without correction

4. Hole size: about 10 ㎡;

5. Sound insulation volume of glottis :≤40dB;

6. Sound source system:

6.1 white noise or pink noise generator;

6.2 1/3 octave filter;

6.3 power amplifier;

6.4 loudspeaker;

6.5 the frequency range of the sound source is 100HZ~5kHZ.

6.6 sound pressure level: resolution 0.1db, accuracy level 1.

6.7 frequency: resolution 0.2~5HZ, error <0.5%+1 resolution unit.

7. Receiving system:

7.1 microphone;

7.2 amplifier;

7.3 1/3 octave analyzer;

7.4 recording instrument;

8.Test mode: automatic test mode;

9. Measurement and analysis of 1 set of special software (lifetime free upgrade).

10. Laboratory composition

11. Site requirements

Room size: length: 15× width: 6× height: 5m (including control room).

Floor sound insulation laboratory room size: length 12× width 10× height 11m (including control room).

Doors, Windows and floor sound insulation laboratory can be built in the form of common reception room, room size should be designed according to the site conditions.

Each laboratory should be designed according to the actual situation: the reverberation time of the reverberation room should be added as far as possible to ensure the indoor sound field diffusion. The limit of reverberation time is determined by molecular absorption of air at high frequencies and by absorption of wall, ceiling and floor surfaces at low frequencies. Commonly used materials such as ceramic tile or terrazzo. Reverberation rooms are often irregular rooms or rectangular rooms with a harmonic series ratio. The method of making reverberation chamber irregular is to make the relative wall surface not parallel or to install protruding cylinder on the wall surface or to use v-shaped wall.

12. Power: AC220V 2kW