The term "practice mute" refers to a device used by musicians, particularly brass and woodwind players, to reduce the volume of their instrument while practicing. This allows musicians to work on their technique and sound without disturbing others or creating excessive noise. Practice mutes are designed to fit inside the instrument and can significantly lower the sound level. In addition to volume reduction, practice mutes can also help players focus on their intonation and tone quality. By using a mute, musicians can hear subtle differences in their playing, which aids in developing their skills. Commonly used by trumpet and trombone players, practice mutes come in various materials, including rubber and metal.