Reverberation time data obtained by the BRE in jhrnished rooms in dwellings over the last twenty years are reported. It is shown that reverberation times have decreased orcr the period and are now well below the value of O" 5 s jound in the 1950s, particularly at high Jrequencies. It is shown that t
ANDERSON LOCALIZATION IN COUPLED REVERBERATION ROOMS
โ Scribed by R.L. WEAVER; O.I. LOBKIS
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 324 KB
- Volume
- 231
- Category
- Article
- ISSN
- 0022-460X
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โฆ Synopsis
It is shown that energy #ow between weakly coupled reverberant systems, for example reverberation rooms coupled by a small window, can be Anderson localized. The e!ect is signi"cant when the energy #ow rate (in units of inverse time) is comparable to or less than modal spacings. It is found that the energy partition in the localized regime slightly overshoots its (low) asymptotic value. The e!ect is demonstrated in numerical simulations and in a laboratory ultrasonic system.
๐ SIMILAR VOLUMES
The traditional method of measuring the sound power radiated by a source in a reverberation room is examined theoretically and experimentally with particular regard to low frequencies. This method has for many years been suspected of underestimation at low frequencies. However, this suspicion is not