A reverberant field requires roughly twenty or more reflections to exist.
Evidence
Clearly the length of time that it takes for sound to die is a function not only of the absorption of the surfaces in a room but also of the length of time between interactions with the surfaces of the room. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1824 (
#expands, via linked claim)
The decay of the reverberant field level: When a tone in the space stops, or after a transient, the reverberant sound level will not reduce immediately but will instead decay at a rate determined by the amount of sound energy that is absorbed at each reflection. Thus in spaces with a small amount of absorption, the reverberant field will take longer to decay. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1743 (
#expands, via linked claim)
Categorization
- XREF: connects to: Reverberation time depends on both surface absorption and time between reflections — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1824; Absorption at each reflection governs how fast reverberation decays — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1743
Broader Connections
- Reverberation time depends on both surface absorption and time between reflections
#expands(0.78) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1824 - Absorption at each reflection governs how fast reverberation decays
#expands(0.75) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1743