Field trials of proposed procedure for the assessment of low frequency
noise complaints
Acoustics Research Centre, Salford University, (2005)Abstract
This report describes field trials carried out to test the workability
and usefulness of a procedure for assessing low frequency noise.
The procedure includes guidance notes and a pro-forma report with
step by step instructions. It does not provide a prescriptive indicator
of nuisance but rather gives a set procedure to help Environmental
Health practitioners to form their own opinion. The assessment is
based on whether the measured levels of LFN exceed a reference curve,
and whether there is correlation between the complainant’s comments
and measured noise.
A series of six trials of genuine ‘live’ LFN complaints was conducted
by volunteers from Environmental Health departments. In two out of
six cases an environmental noise was identified and its source located.
In the remaining four cases no environmental noise was found and
the officers concluded that there was no remedial action they could
take. Their experience in applying the procedure was generally very
positive: the participating officers found the procedure easy to
use and that working to a set procedure increased their confidence
and the complainant’s acceptance of the results. They also considered
that the procedure achieved a good balance, giving a set procedure
but allowing them the flexibility to form their own conclusions.
The EHOs were generally able to draw firm conclusions and reach ‘closure’
if there was nothing they could do to help.
The proportion of cases for which no precise cause can be found is
typical of LFN cases around the world. It points to the need for
an improved understanding of the phenomenon, as well as for alternative
sources of help for complainants.
A number of mostly minor modifications have been made to the procedure
which it is recommended should be made available for a trial period
as soon as possible.