Module 4: Reverberation Time

Question 1

Reverberation Time (RT) is the time it
takes for reflected sound to die down
by __ dB from the instant that the
sound signal ceases.

Answer 1

60

Question 2

RT is measured in seconds.

Answer 2

RT60

Question 3

The effectiveness of any material as a sound absorber can be expressed by its ____

Answer 3

absorption coefficient

Question 4

Materials having high sound absorption coefficients (greater than 2.0) are referred to as _____; while those with low coefficients are ____.

Answer 4

Sound absorbing; sound reflecting

Question 5

Steps on how determine RT of a room

Answer 5

1. Identify and list all the materials/finishes of each surface inside the room
2. Compute the surface area for each material
3. Identify the absorption coefficient of each material
4. For each material, multiply its surface area by its absorption coefficient. = sabins
5. Total all the sabins
6. Compute RT using formula
7. Give assessments
8. Make necessary changes until desirable reverberation time is achieved.