An Experimental Study of Trumpet Embouchure
Hayward W. Henderson · The Journal of the Acoustical Society of America · 1942
This paper is the result of a search for some way to facilitate the acquisition of trumpet lip-technique. A comparative study of players of various abilities, by means of photographs and stroboscopic observations of the lips in vibration, graphs of mouthpiece pressure against frequency, and readings of mouth-air pressure under various playing conditions, calls into question several of the currently held conceptions as to how trumpet tones are produced and controlled.