The report contains a series of maps that depict noise zones around major airports in Australia. These maps on their own are quite a valuable information resource for prospective home buyers and property developers - they will help in assessing the likelihood of aircraft noise in various parts of the city. In particular, the maps show computed outlines of various types of Aircraft Noise Exposure Forecast (ANEF). ANEF is a measure of the aircraft noise exposure levels in decibels around aerodromes based on average daily sound pressure levels:
- ANEF 20 (zone of expected continuous noise exposure over 5-20 years period).
- N70 20 - zone with 20 or more daily events greater that 70 dB(A);
- N65 50 - zone with 50 or more daily events greater that 65 dB(A);
- N60 100 - zone with 100 or more daily events greater that 60 dB(A).
For comparison, quiet bedroom will record 35 dB(A), passenger car at 60km/h 70 dB(A); and heavy diesel lorry at 40km/h 83 dB(A).
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