Sound and Vibration Instrument Hire and Calibration
NTi Audio : XL2 Reverberation Time Analyser
|NTi XL2 : Reverberation Time Analyser||£ 25 a day *|
RT60 is the time required for the sound pressure level to decrease by 60 dB after the sound stimulus stops. It is not possible to measure a 60dB decay in most rooms due to the background noise level, so the relevant standard BS EN ISO 3382 specifies measuring the 20 dB decrease, multiplying the answer by 3 and labelling the result RT60 (T20).
In small rooms where the background noise is low the reverberation may be measured directly using an impulse source like a starting pistol. In larger spaces or where the background noise is too high a gated pink noise like the Minirator MR-PRO and a non-directional loudspeaker with a power amplifier are also required.
See also other Reverberation Time Meters* Our standard hire charges are based on a 4-day minimum period, details other options.