Walk away method versus reverberation time method in determining the room constant

✍ Scribed by C. Ianniello

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 433 KB
• Volume: 14
• Category: Article
• ISSN: 0003-682X
• DOI: 10.1016/0003-682x(81)90010-4

✦ Synopsis

The room constant is a quantity relating to the sound absorption in an enclosure. It is necessm'v to room acoustics engineering calculations based on the perJectly diffuse sound field theory, both in noise control work and sound system design. Normally, in the validation o/the above-mentioned theol')', in situ evaluations o/the room constant are performed on the basis oj reverberation time measurements in the relevant space. Such methods jail to give accurate results when uncertainties regarding the volumes and areas effectively involved in the reverberation process arise. In this case the walk away method is more advantageous in that it only needs stead)' state sound pressure level measurements at various distances/?om a small sound source whose directivity Jactor is known.

In this paper both methods are discussed and experimental results relative tojour different rooms are compared.