How Many, How Loud, How Big ?
Data for Commercial Airlines.
 
 

Notes:

(1)  All data from  JWA Noise Abatement Program reports. Average Single Event Noise Exposure Levels for January-March 2000 were used, as measured at the closest takeoff noise monitoring site, designated 1S. The site is at the golf course, 3100 Irvine Avenue south of Bristol Street.  Data is the weighted average for all airlines using the aircraft type. Not every departure was measured or reported.

(2)  As defined by JWA Noise Abatement Program:

• Class A flights generate 94.0 - 101.5 dB max. at the closest takeoff monitoring point.
• Class AA flights generate 92.5 - 94.0 dB at this point.
• Class E  flights generate 92.5 dB or less.

The 1985 Settlement Agreement allows a daily average of:

• 39 Class A departures (later increased to 41 to allow two cargo flights),
• 34 Class AA departures, and
• an unregulated number of Class E departures so long as passenger limitations are not exceeded.

(4)  Some flights were measured as falling in Class A and some were in Class AA noise categories.

(5) Class E aircraft operations are exempt from Average Daily Departure limits but are counted in Passenger limits.

(6) In all cases, measured noise levels counts do not equal the number of aircraft operations. No data was provided for this aircraft type. No explanation was provided.

(7) Mostly passenger flights. Includes UPS all cargo flights, Class A.

(8) The 1985 settlement agreement allows 9 loading bridges for aircraft as large as the B767.
However, maximum weight restrictions at the airport are significantly below the B767's capabilities and this aircraft is not use.

Click for JWA passenger data.

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This page last updated on July 14, 2000.