The author’s prized 33 1/3 r.p.m. flexidisc, How Quiet Is Our STOL?, issued by the publicity department of de Havilland Canada circa 1975. If you want to enjoy this classic of comparative aircraft noise levels for yourself, a Sound Cloud file is accessible on Hush-Kit page The Whispering Blades of The Flying Mad Men (www.hushkit.net).

Самолёты на фотографии: Aircrafts on the photo: De Havilland Canada DHC-7 Dash-7 - КанадаCanada - 1975