From the U.S. Government Accountability Office, www.gao.gov

Transcript for: Helicopter Noise and Flights in the D.C. Area

Description: In 2019, helicopter operators conducted over 28,000 flights
in the D.C. area to support military, law enforcement, air medical, and
other missions. This video shows examples of helicopters in the area and
the noise from these flights, which can be annoying to local residents.
We recommended that FAA work with D.C. area helicopter operators to
improve responses to residents' noise concerns.

Related GAO Works: GAO-21-200, Aircraft Noise: Better Information
Sharing Could Improve Responses to Washington, D.C. Area Helicopter
Noise Concerns

Released: January 2021

[ Video of different helicopters flying in the air ] 

[ Words on screen : ] Helicopters create different sounds than other
types of aircraft.

When a helicopter is nearby, an individual may hear a pulsing noise as
it flies.

The noise can be annoying depending on factors such as its duration.

GAO reviewed helicopter flights and noise in the Washington D.C. area.
GAO also reviewed the actions taken and potential strategies suggested
to address helicopter noise in the D.C. area. 

For more info, check out our report GAO-21-200 at: GAO.gov