Reverberation time = \frac{0.17 V}{A} = \frac{0.17 V}{QS}

= \frac{0.17 \times 10^{5}}{2 \times 10^{4}\times 0.2} = 4.25

I found an answer from ntrs.nasa.gov

**ABSORPTION** OF SOUND IN AIR VERSUS HUMIDITY AND ...

**2**. **3**. **4**. **5**. 6. 7. 8. 9. Example of a plot of experimental data of the molecular ...
Values of total **attenuation coefficient m** versus humidity **for** a frequency of 4000
Hz at ... Measurements **have** been made of the **absorption** ... the smallest wall
**surface area for** a given **volume** and since ... + **4**.lf2 **x 10**'8 ... **time** of the same
**auditorium**.

For more information, see **ABSORPTION** OF SOUND IN AIR VERSUS HUMIDITY AND ...

I found an answer from en.wikipedia.org

**Reverberation** - Wikipedia

Reverberation, in psychoacoustics and acoustics, is a persistence of sound after
the sound is ... 2.1 **Sabine equation**; 2.2 Eyring **equation**; 2.3 **Absorption**
**coefficient** ... **Reverberation time** is a measure of the time required for the sound
to "fade ... source model of sound reflection, as opposed to **Sabine's** empirical
approach.

For more information, see **Reverberation** - Wikipedia