RT60 Reverb time Reverberation time to sound decay rate conversion calculator

reverb reverberation time RT60 rate of spatial decay sound decay rate calculate calculation calculator computation calculate calculation convert conversion factor ratio reverb response dB per second dB/s ratio sound pressure level matching dB/s dB SPL sound pressure intensity ratios airborne sound pressure level audio reference dBs voltage volts watts table tables chart charts air sound studio techniques acoustics volts volt watts DR sound pressure intensity sengpielaudio Sengpiel Berlin

Deutsche Version

Conversion
Reverberation time RT₆₀ to sound decay rate D_R and

sound decay rate to reverberation time for sound in air

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Sound decay rate D_R = 60 dB / RT₆₀ in dB per second (dB/s)
and Reverberation time RT₆₀ = 60 dB / D_R in seconds (s)

In a control room or a living room we cannot speak really more of the audible "reverberation response" or "reverb time".
In particular for short reverberation times frequently the "sound decay rate" or "rate of spatial decay" in dB/s is used. This means with which level in dBs per second the sound signal in the room decays after switching the acoustic source off.
The decay rate is the time rate at a stated frequency, at which sound pressure level decreases in a room. The unit is decibel per second (dB/s).
The decay time is that elapsing time, in which the sound pressure level from a value to another drops; both values, the initial value and the goal value must be determined explicitly. A common unit for the description of the decrease of sound pressure level is the decibel per second (dB/s).
The reverberation time or the time of reverberation is defined as the time it takes for the SPL (sound pressure level) todecay to one-thousandth (! not millionth !) of its former value, a 60 dB reduction, hence called the RT₆₀ of the space.
Sometimes it is also called decay time.

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