The emission of noise in the frequency range 10 kHz to 25.6 kHz
from an experimental gas leak in a flanged joint has been
experimentally investigated. The overall conclusion is that the
emitted noise is almost frequency independent in level within the
considered frequency range.A small PC program for estimation of
the attenuation of sound during free field propagation outdoors
has been developed and used for simulations. A number of curves of
sound attenuation under varying temperature and humitidy
conditions are shown. A crude overall estimate is
provided.Computer simulations of the influence of the ground
reflection on the received sound level have been carried out.
These simulations have been carried out for the case of no wind
and for one downwind and one upwind example. One of the
conclusions is that the receiver should be located several meters
over the ground in order to reduce the influence from upwind
conditions.
| Number of pages | 34 |
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| Publication status | Published - 1997 |
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