This classic Eastern Air Lines commercial from the 1960’s (guessing around 1964, since that is when the 727-100 entered service) highlights the Boeing 727 entering service with the airline. They tout it as “being as quiet as a library.” Hmm… I am not sure what library they are hanging out in, but those Boeing 727-100’s without hush kits are not known for their silence. Well, at the time, they were quieter than other jets, but as much as a library? Haaardly.
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