Abstract
When people are annoyed by low frequency noise, their first concern is to stop the noise. Therefore it is necessary to find the source of the noise. Unfortunately, not in every case is the source very obvious. In most cases a lot of potential sources are available both inside and outside the building. Of course in theory it is possible to find the source by switching on and off all the potential sources but in practice this is not always practicable.
In this paper three cases of possible low frequency noise are presented in which different methods of finding the source have been used. In all these cases the nuisance is present in a domestic situation and has been going on for several years. Some of the residents suffer from mental problems due to the unwanted noise. Using the measurement results the searching methods are discussed and evaluated.