Air noise
Blowing through the instrument. Notated with a verbal instruction and
perhaps rhythmic notation. Effective on the trombone and
can be combined with slide motion or whistling. However, the single
valve leaves little opportunity for simultaneous clacking.
Air noise:
Flap tongue
Flapping the tongue in the mouthpiece. Notated with x-noteheads and verbal instruction. Some pitches are avilable.
Flap tongue:
Multiphonics
Multiphonics are achieved by singing into the instrument while playing. Notate sung notes with small noteheads. Easy and effective on the trombone, although it is hard to sing a note lower in pitch than the one being played.
Multiphonics:
Microtones
Intervals smaller than a semitone. Notations vary, but the examples
above show a microtonal inflection and a quartertone. Microtones are easy on the trombone.
Microtones:
Removed parts
Removing sections of the instrument to play. Notated with a verbal instruction.
Removed parts:
Smacking sounds
Smacking part of the instrument with the hand. Notate with a verbal instruction. The most common is the mouthpiece smack, but smacking the instrument elsewhere (and various clicks and clacks) are also possible.
Smacking sounds: