Points out that natural ventilation openings offer little resistance to the passage of noise, as the introduction of conventional passive noise control treatments will generally incur a large flow constraint. Reviews various noise control techniques and assesses the variation of airflow characteristics with sound insulation to road traffic noise of a facade incorporating ventilation openings. Suggests that reactive and active techniques can possibly supplement conventional passive attenuation especially in the limiting low frequency region while adding minimal flow constraint to the ventilation path. Concludes that by using such hybrid systems, useful broad band sound reduction may be a real possibility for natural ventilation openings.
Primary Author(s): DeSalis M H F, Oldham D J, et al
Source: Bldg. Environ., May 2002, vol.37, no.5, 471-484, 19 figs, 52 refs.
BSRIA Abstract Doc 000103392 Abs 20020496
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