Kingscote Airport Master Plan Apr 2010 - Kangaroo Island Council

KINGSCOTE AIRPORT MASTER PLAN
Aircraft Noise
The Australian Noise Exposure Forecast (ANEF) system is used to determine potential
aircraft noise around Australian airports. The ANEF system uses the sum of predicted
aircraft noise events over an average day to determine the forecast noise exposure level.
For airports with low traffic volumes and no jet activity, noise footprints generated by the
ANEF model often barely go beyond the airport boundary. This can give a perception that
aircraft noise does not occur in areas where residents do in fact experience aircraft noise
albeit on an infrequent basis. An alternative approach is to compare the frequency and
extent of individual noise events to the Building Site Acceptability provided in AS 2021
Acoustics - Aircraft Noise Intrusion - Building Siting and Construction as shown in the
following Table.
Table 4 Building Site Acceptability Based On Aircraft Noise Levels
Aircraft noise level expected at building site, dB(A)
20 or less flights per day Greater than 20 flights per day
Building site Acceptable Conditionally
acceptable
Unacceptable Acceptable
Acceptable
Conditionally
Unacceptable
House, home
unit, flat, 90 85
caravan park
Hotel, motel,
Hostel,
95 90
Public Buildings
Commercial
building
< 90 90 to 100 > 100 90
Light Industrial < 95 95 to 105 > 105 100
Heavy Industrial No limit No limit No limit No limit No limit No limit
For the purpose of this Master Plan the following assumptions have been made:
− the maximum size aircraft regularly servicing Kingscote within a 15 year time frame will
be F50/Q400;
− the aircraft arrivals and departures will follow the extended runway centreline for duration
of noticeable noise levels; and,
− traffic numbers using the cross runways are so low that aircraft noise is unlikely to impact
on the community which remains well clear of the flight paths for this runway.
Australian Standard AS 2021 Acoustics - Aircraft noise intrusion - Building Siting and
Construction provides noise level tables dB(A) for aircraft representative of the design aircraft
i.e. the Saab / F50 / Dash 8 aircraft. A plot of the single event contours is shown on the
following plan at Figure 4. Note the Dash 8- Q400 is rated quieter than the aircraft listed in
AS 2021 so the noise level shown overleaf can be considered a worst case scenario.
The plan shows the extent of individual noise contours of the larger aircraft (expected to be
less than 20 flights per day) do not extend to the population centres. Similarly general
aviation aircraft operations even if exceeding 20 flights per day, remain clear of population
centres. In order to avoid future noise problems it is recommended that noise sensitive
development such as residential areas be kept clear of the 80 dB(A) contours shown on the
plan. Where a proponent wishes to construct individual dwellings within the 80 dB(A) zone
consideration to the use of noise control features in the design as per the recommendations
contained AS 2021 is suggested.
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