New ways of lumped parameter analysis in an enclosed environment

Regular paper

Chris Van Dijk

Alara-Lukagro bv

Wednesday 3 june, 2015, 08:40 - 09:00

Auditorium 2 (592)

Earlier on I have reintroduced the mean free path as an addition to the reverberation time in acoustics in a closed environment. A lumped parameter analysis then shows that in highly absorptive rooms, such as sound studios, the progression of sound is much higher than the ISO 140 equations predict. The difference can be as high as 4-7 dB. This gives enough reason to state serious doubts about the equations that are stated in the ISO 140 method. Most acousticians are already aware of the mismatch in units in the equations of Sabine. In this presentation Lumped parameter mathematics will be used to fully solve the acoustic progression in an enclosed space from scratch. The results will be compared with ISO 140. Finally the future possibilities, and impossibilities in the use of the ISO 140 is evaluated.

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