Active Noise Reduction (ANR) involves the use of sophisticated electronics to cancel out loud, low frequency noise that is often present in aircraft, along with seals over the ears.
The FAA website provides monthly Aviation Maintenance Alerts which provide a way to share information on aviation service experiences. These alerts help lead to improved aeronautical product durability, reliability, and safety. The information is provided by people who operate and maintain civil aeronautical products.
The FAA has a toll-free, 24 hour a day hotline, where consumers can ask questions and report specific violations. There is also a whistleblower hotline where aviation industry employees can report information regarding air carrier safety or participate in other protection activities. This hotline can be reached by dialing 1-866-TELL-FAA (1-866-835-5322).