New ways of lumped parameter analysis in an enclosed environment

Regular paper

Alara-Lukagro bv

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

Auditorium 2 (592)

Abstract:

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.