What equipment and instruments are needed for theater acoustic test?

Detecting sound insulation and background noise requires a sound level meter, which can measure at least eight degrees and detect reverberation time, which can be calculated in time domain. At present, some sound level meters have their own reverberation time modules. If it is detected by the electro-acoustic system of the cinema, there is no need for a sound source. If not, they need a dodecahedron sound source.