Modern didgeridoo designs mouthpiece with a concave face that is close to double the diameter of a regular didgeridoo mouthpiece. This mouthpiece gives a player more room to control the vibration of their lips at frequencies below the traditional drone. The technique is similar to playing pedal tones on a brass instrument. The desired tone is different then brass, and there for the embouchure used to play it is different than brass technique. The most prominent playable note on these instruments is always one octave below the fundamental didgeridoo drone. Several other drone-notes can be played below the fundamental as well, and these
Facial hair in the military will cover the upper lip line, extend sideways beyond a vertical line drawn upward from the corners of the mouth...or extend above a parallel line at the lowest portion of the nose." Those with skin conditions such as pseudofolliculitis barbae or severe acne are allowed to maintain short facial hair with the permission of a doctor or medic, but no shaping is allowed, only trimming with an electric razor, or approved regular razor. 1/8 - 1/4 of an inch (3.2 mm) is usually the standard for this condition. Additionally, for almost a decade, ending with a "deauthorization" order that took