Abstract
This paper presents the results of a survey undertaken among the local environmental health authorities (MHKs) in Sweden on complaints due to low-frequency noise. The results demonstrate that complaints due to low-frequency noise comprised a majority of all complaints due to noise. The most common sources of low-frequency noise reported were mechanical ventilation, heavy traffic, and heat pumps. Concerning changes over time, the number of complaints had increased, particularly those related to heat pumps. Data from this and previous studies suggest that the use of the dB(A) unit to express exposure to low-frequency noise is inadequate from a medical-hygiene and annoyance point of view.
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