Reverberation Time RT60 is the core parameter used to quantify reverberation and acoustic reflection behavior in enclosed spaces. It represents the time required for the sound pressure level to decay by 60 dB after the sound source stops, reflecting the interaction between reflection and absorption of room surfaces.
RT60 is determined by analyzing the energy decay curve for each frequency band. Because of dynamic range limitations, measurement is often performed over a portion of the decay curve and extrapolated to RT60. T20 and T30 are important intermediate values that allow RT60 to be derived reliably under real measurement conditions.
The improved Lundby algorithm supports automatic detection of the appropriate linear decay region, reducing errors caused by noise or late reflections. Results can be exported as separate channels including reverberation time, ETC, octave data, and fitted decay curves to support acoustic optimization.
