Although the international definition of low frequency
noise (LFN) has not as yet been conclusively formulated,
LFN is usually defined as a broadband noise with the
dominant content of frequencies from 10 (20) to 250 Hz.
There is a growing body of data showing that LFN differs
in its nature from other environmental noises at comparable levels, which are not dominated by low frequency
components [1−4].
Low frequency noise is not only ubiquitous in the general,
but also in the occupational environments, especially in
industrial control rooms and office-like areas. Ventilation
systems, pumps, compressors, diesel engines, gas turbine
power stations or means of transport may be quoted as