By attaching the "Warm-up" to the bell of your instrument and playing as usual, the sound that leaks out is muffled to the level of a quiet conversation (-25 to -35dB). Thanks to its high sound-dampening performance, you can freely (*) blow into your instrument backstage, maintaining optimal lip condition. Also, due to its high sound-dampening performance, it is very popular as a practice mute. Used only a few times, please understand that this is a USED item. There is a dent. (See image) #Trumpet #Cornet #Flugelhorn #Mute #Cup #Straight #Wah-wah