- The reverb time or T60 is
- how long a listener will hear a sound,
- the time required for a sound to decay by
1/1000 (or level by -60 dB).
- T60 depends on:
- Volume: large volume rooms tend to have longer T60s.
- Surface area: with constant volume, T60 will decrease with an
increase in surface area available for reflections (and thus
absorptions).
- Nature of surface area:
- absorptivity: soft porous surfaces (curtains, carpet,
upholstered chairs) absorb more acoustic energy than hard, solid,
nonporous surfaces.
- roughness: if the surface is not perfectly flat,
part of the sound is reflected and part is dispersed in (many) other
directions.
- T60 is also dependent on the amplitude of the original
sound and the presence of other sounds.
- Listen to RT
demo.
``Music 175: Space''
by Tamara Smyth,
Department of Music, University of California, San Diego (UCSD).
Download PDF version (space175.pdf)
Download compressed PostScript version (space175.ps.gz)
Download PDF `4 up' version (space175_4up.pdf)
Download compressed PostScript `4 up' version (space175_4up.ps.gz)
Copyright © 2019-04-16 by Tamara Smyth.
Please email errata, comments, and suggestions to Tamara Smyth<trsmyth@ucsd.edu>