Graphics for Notes on Jet
Freighter Approach Noise
Graphs and tables of measured noise at the
west ridge of El Dorado Hills
Source:
Sacramento County Airport System
Average L
max = 66.0 dB
Minimum L
max = 51.5 dB
Maximum L
max = 73.0 dB
4 of 13 approaches > 70 dB
One flight's Lmax
was "lost in ambient". This missing data
point was not considered
in determining minimum and average Lmax.
85th percentile range: 59.3 dB- 71.6 dB
(covers 11 of 13 measurements)
Average L
max =
64.9 dB
Minimum L
max = 60.4 dB
Maximum L
max =
73.4 dB
4 of 31 approaches > 70dB
all < 75 dB
85th percentile range: 62.2 dB- 71.0 dB
(covers 27 of 31 measurements)
(continuation of same table)
Approach tracks for ABX1927, one of two arrivals usually occurring at about 3:45 a.m.
37 approaches, April 1 through May 22, 2008
Approach tracks for UPS 956, the arrival usually occurring at about 4 a.m.
30 approaches, April 1 through May 22, 2008
Comparison with environmental noise: Chart from Oakland Airport
annotated in color to show measured range of
Lmax (maximum sound level) during overflights at EDH west ridge
Source: Original table from National Center for Asphalt Technology, Auburn University
Tire/Pavement Noise Study
by Douglas I. Hanson, Robert S. James, and Christopher NeSmith
Jet freighter noise line from Sacramento County Airport System measurements:
*65 dB average Lmax, typical range ± 5dB, maximum observed range +8.4 / -13.5 (51.5 to 73.4)
Cargo volume handled through
Mather:
The trend in recent years, from FAA statistics
See Demand Forecast for additional information
