Monitoring Aircraft Noise

1.	During the last 3 years, did your airport record the number of noise complaints?
	(Select one.)
	1.		Yes
	2.		No (Skip to question 3.)
	3.		No answer (Skip to question 3.)

2.	In calendar year 2008, roughly how many noise complaints did your airport receive?

	Number of complaints

	Number of people making noise complaints (if known)

3.	Does your airport have any of the following systems for receiving noise complaints?
	(Please check all that apply.)
	1.		Phone hotline
	2.		Web site
	3.		Online complaint form
	4.		Dedicated e-mail address
	5.		Other system to receive noise complaints
	6.		None - Airport does not have a system to receive noise complaints.
	7.		No answer

	If you answered "Other system to receive noise complaints" above, please specify:

4.	During the last 3 years, did your airport monitor noise levels in areas surrounding the airport?
	(Select one.)
	1.		Yes
	2.		No (Skip to question 10.)
	3.		No answer (Skip to question 10.)

5.	During this period, did your airport use supplemental noise metrics, other than Day/Night Average Sound Level (DNL), to monitor these noise levels?
	(Select one.)
	1.		Yes
	2.		No (Skip to question 10.)
	3.		No answer (Skip to question 10.)

6.	During this period, which of the following supplemental noise metrics did your airport use?
	(Please check all that apply.)
	1.		Community Noise Equivalent Level (CNEL)
	2.		Single Event Noise Level (SENL)
	3.		Sound Exposure Level (SEL)
	4.		Equivalent Sound Level (Leq)
	5.		Maximum Sound Level (Lmax)
	6.		Time Above dBA Threshold (TA)
	7.		Number Above dBA Threshold (NA)
	8.		Other supplemental noise metric
	9.		No answer

	If you answered "Other supplemental noise metric" above, please specify:

7.	Is your airport required to use any of these metrics?
	(Select one.)
	1.		Yes
	2.		No
	3.		No answer

8.	In your opinion, what are the primary advantages of using these supplemental noise metrics?

9.	In your opinion, what are the primary disadvantages of using these supplemental noise metrics?

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Full Report: GAO-10-50

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