How do you calculate actual reverberation time?

The first step to calculate the reverberation time is to calculate the Sabins with the below equation.

  1. Formula for Sabins: a = Σ S α
  2. Where: Σ = sabins (total room absorption at given frequency) S = surface area of material (feet squared)
  3. Sabine Formula: RT60 = 0.049 V/a.
  4. Where: RT60 = Reverberation Time.

What is the RT60 formula?

RT60 is an acoustical measurement used to calculate reverb time decay. RT60 is in reality the measurement of time it takes a given audio signal to fall -60db (decibels). The formula is RT60 = k*(V/Sa).

What is reverberation time and how it is calculated?

The reverberation time of a room or space is defined as the time it takes for sound to decay by 60dB. For example, if the sound in a room took 10 seconds to decay from 100dB to 40dB, the reverberation time would be 10 seconds. This can also be written as the T60 time.

What is RT60 value?

RT60 is defined as the measure of the time after the sound source ceases that it takes for the sound pressure level to reduce by 60 dB.

What is NRC value?

The noise reduction coefficient (commonly abbreviated NRC) is a single number value ranging from 0.0 to 1.0 that describes the average sound absorption performance of a material. An NRC of 0.0 indicates the object does not attenuate mid-frequency sounds, but rather reflects sound energy.

What is reverberation time RT60?

Reverberation time, or RT60, is a metric which describes the length of time taken for a sound to decay by 60 dB from its original level. Optimal reverberation times vary depending on room volume, intended use of the space and the frequency of transmitted sound.

What is a Sabine in acoustics?

The sabin (or more precisely the square foot sabin) is a unit of sound absorption, used for expressing the total effective absorption for the interior of a room.