Room size, absorption characteristics - and attenuation in direct sound fields.
Room attenuation in a direct sound field as function of room size and room sound absorption characteristics:
- 1 ft2 = 0.0929 m2
The diagram is based on a listener within 5 ft (1.5 m) from the source.
Typical Rooms and their Absorption Characteristics
- Hard - bath rooms, large churches, gymnasiums, factories
- Average - private homes, concert halls, restaurants, offices, conference rooms, hotel rooms, school rooms, hospitals, libraries, churches, reception rooms
- Soft - radio and TV studios, theaters
Example - Sound Attenuation in an "Average" Room
The sound attenuation in an "average" room with surface 100 m2 (1076 ft2) can be estimated from the diagram above to be approximately