in music, brass wind musical instrument sounded by lip vibration against a cup mouthpiece. Ethnologists and ethnomusicologists use the word trumpet for any lip-vibrated instrument, whether of horn, conch, reed, or wood, with a horn or gourd bell, as well as for the Western brass instrument. The technical distinction between trumpet and horn is that one-third of the tube length of a trumpet is conical and two-thirds is cylindrical, while the horn's tube is the opposite. Both types are found throughout the world. For example, non-Western long trumpets are as dispersed as the kakaki of West Africa, the Persian and Arab nafir, the laba of China, and the spectacular dung-chen of the Tibet Autonomous Region of China.
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