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20-133 - Cockpit Noise and Speech Interference Between Crewmember

Date Issued
March 22, 1989
Responsible Office
AIR-130,  Aviation Safety - Aircraft Certification Service, Aircraft Engineering Division
Provides information about the relationship between flight crew members cockpit voice communication and cockpit noise levels. Guidance, on speech interference levels, noise measurement and measurement systems, and methods to improve cockpit communication, is provided for those manufacturers, owners or operators who believe cockpit noise may be a problem on their aircraft. This guidance material is relevant to the operation of all types of civil aircraft.