ACE6401 Reverberation Time Measurement System

ACE6401Type reverberation time measurement system

Reverberation time is the most important acoustic indicator for indoor sound quality, and it is often used in acoustic measurements to correct the sound field. Such as sound insulation measurement, sound power measurement, etc. This indicator is measured using the interrupted sound source methodMLSMethod and pulse reverse integration method.

relevant standards

GB/T 50076-2013Specification for measuring indoor reverberation time

GBT 20247-2006Acoustic reverberation chamber sound absorption measurement

ISO 3382-2:2008Acoustics - Measurement of Acoustic Parameters in a Room - General Measurement of Room Reverberation Time

Cut off sound source method

The classic method for measuring reverberation time. Generate a stable sound field by emitting sound from an undirected sound source, then abruptly interrupt the sound source and directly record the indoor sound pressure level decay curve

Pulse reverse integration method

Generate pulse sound using a starting gun, firecracker, etc., record the variation of sound pressure over time, and obtain the decay curve of sound pressure level by reverse integration

MLSlaw

Sound is produced through an undirected sound sourceMLSSignal (determining sequence signal), obtaining pulse signal through correlation operation, and then performing reverse integration to obtain sound pressure level decay curve

ACE6401Type reverberation time measurement system