The Status of Occupational Noise in Some Selected Factories on Libya

Abstract

In this paper occupational noise levels at
selected factories were measured and compared with the
international permissible levels using the integrating
sound level meter (Quest 2800) during the year 2007.
The calibration of the instrument was carried out before
and after each measurement using the acoustic
calibrator (Quest CA-12B calibrator). The method
which was followed was measuring the sound pressure
level of the different noise sources over a broad
frequency band covering the audible frequency range
using the (Octave band filter, model OB-100),
disregarding variation with time.
From the obtained results, some noise levels which
were recorded were within the permissible levels i.e.
below 90 dBA and some noise levels were higher than
the permissible limit as at Janzoor textile factory
(95dBA), Benghazi Macaroni factory (100dBA), and
near the air blowers at Zletin cement factory, Benghazi
cement factory (97-100 dBA) in these cases suggestions
were made to minimize the problem.