Born: United States of America
Primarily active in: United States of America

Charlie Cox, well-known for his work in rotorcraft acoustics for the past 50 years, passed away May 17, 2013 at his home in Grapevine, Texas. Charlie’s contributions to the acoustics community are well recognized by the rotorcraft industry. 

Charlie had a long and productive career. After graduating from the University of Texas in the early 1960s, he began work with Bell Helicopter, where he remained until his retirement 42 years later. Initially in the dynamics group, he recognized the growing need within acoustics, founding Bell’s Acoustics Group and leading it for most of his career.


His pioneering work in helicopter acoustics produced many acoustics-related publications. Most well-known is the iconic “Fly Neighborly” Guide that supports piloting techniques to minimize community impact. During the development of rotorcraft noise regulations in the 1980s, Charlie worked with his industry counterparts and regulatory authorities to achieve practical noise rules, first for helicopters and later for tiltrotors. He was an active participant in ICAO Working Group 1 and represented the rotorcraft industry at several ICAO CAN and CAEP meetings.


He continued to be active in Helicopter Association International (HAI) and AHS International into his retirement. Most who knew him will respect his accomplishments, but will remember him most for his good humor and for his steady and considerate friendship. 

AHS Updates: Vertiflite July/August 2013