Аннотация
Many small power plants have been built in Denmark in recent years.
These plants are often situated near dwellings giving rise to complaints
about annoyance of low frequency noise and vibration indoors. Normally
the annoying low frequency noise is in the frequency range 10–200
Hz. Since it is created by combustion engines the noise has a line
spectrum. In Denmark the A-weighted total level in the frequency
range 10–160 Hz LpA,LF is used for assessment and legislation about
low frequency noise exposure in dwellings. From our experience solving
practical low frequency noise and vibration problems LpA,LF seems
to overestimate the annoyance of very low frequency noise whereas
noise with the major spectral content near 160 Hz seems to be underestimated.
This problem is discussed based on our experience.
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