A survey has been carried out in 72 lecture rooms to investigate the effect of ventilation system noise. In many cases the systems have to operate at reduced speeds to permit tolerable noise levels and the reduced air volume results in the rooms becoming overheated. A lack of knowledge among architects and consultants, a misapprehension about the cost of providing sound control and the non-specification of acoustic standards appear to be the main reasons for this trend. This paper presents details of the characteristics of ventilation system noise and also suggests proposals for future work which will cover the acoustics of high-velocity air conditioning systems.
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References
1.
BeranekL. L.J.A.S.A.195628, 833.
2.
KostenC. W.Van OsG. J.Proc. N.P.L. Symp. Control of Noise1962 (Her Majesty's Stationery Office, London).
3.
KingR. B.‘Ventilation system noise in lecture rooms, conference rooms and auditoria’ (M.Sc. Diss., I.S.V.R., Southampton University).
4.
HowesF. S.RealR. R.J.A.S.A.195830, 714.
5.
MalingG. C.J.A.S.A.196335, 1556.
6.
YeowK. W.‘Some simple experimental observations on the noise of small squirrel cage centrifugal rotors’, 1967 (M.Sc. Diss., I.S.V.R., Southampton University).
7.
Private communication with Mr M. Hirschorn, I.A.C. Inc., New York.
8.
The Institution of Heating and Ventilating Engineers Guide1965, Sect. 13, 301.
9.
KurtzeG.Acustica196111.
10.
MellingT. H. Personal communication (I.S.V.R., Southampton University).
11.
IngardU.J.A.S.A.195931, 1202.
12.
CroomeD. J.M.Sc. Dissertation, The acoustics of ventilation ducts1966 (London University).
