Straight

Cone shaped object (usually metal) with three pieces of cork to hold it in the bell of the trumpet.
Notated: mute (It. con sordina Germ. mit Dämpfer Fr. avec sourdine).
Note: Be sure to instruct the player to remove the mute when no longer required.
Straight mute:

Bucket

Bucket-shaped mute filled with cloth which clips over the bell of the trumpet.
Notated: bucket.
Note: Be sure to instruct the player to remove the mute when no longer required. Allow lots of time to attach a bucket mute!
Bucket mute:

Cup

Cup-shaped cardboard inserted into bell of trumpet.
Notated: cup.
Note: Be sure to instruct the player to remove the mute when required.
Cup mute:

Plunger

A plumber's plunger held over the bell of the trumpet and opened or shut.
Notated: plunger.
Note: be sure to instruct the player to put down the mute when no longer required.
Plunger mute:



Harmon

Metal mute wrapped in cork and inserted into bell of trumpet. The mute has a stem which is normally fully inserted, but may be pulled out or removed entirely. A 'waa-waa' effect may also be achieved by using the hand to cover and uncover the stem opening.
Notated: harmon
- stem out
- remove stem
- waa-waa (+ = shut, o = open).
Note: It is best to clarify what you mean by 'stem out' with a note in the score. As with all mutes, allow time for inserting and removing, and indicate when the player is required to remove the mute at the end of a muted passage. The harmon mute makes a quiet sound!
Harmon mute:
Waa waa effect: