Mouthpiece (brass) Mouthpiece (brass) On brass instruments the mouthpiece is the part of the instrument placed on the player's lips. The mouthpiece is a simple circular opening that leads, via a semi-spherical or conical cavity, to the main body of the instrument. Mouthpieces vary to suit the tone of the instrument. Lower instruments also have larger mouthpieces, to maximize resonance (see pitch of brass instruments). Also, mouthpieces are selected to suit the embouchure of the player, to produce a certain timbre, or to optimize the instrument for certain playing styles. For example, trumpet and trombone mouthpieces are usually semi-spherical whereas French horn
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