Trumpets

The player’s vibrating lips set the air in motion.

423.1 Natural trumpets – There are no means of changing the pitch apart from the player’s lips. Examples include the bugle, didgeridoo, natural horn, and the shofar.
423.11 Conches – A conch shell serves as trumpet.
423.111 End-blown.
423.111.1 Without mouthpiece.
423.111.2 With mouthpiece.
423.112 Side-blown.
423.12 Tubular trumpets.
423.121 End-blown trumpets – The mouth-hole faces the axis of the trumpet.
423.121.1 End-blown straight trumpets – The tube is neither curved nor folded.
423.121.11 Without mouthpiece.
423.121.12 With mouthpiece.
423.121.2 End-blown horns – The tube is curved or folded.
423.121.21 Without mouthpiece.
423.121.22 With mouthpiece.
423.122 Side blown trumpets.
423.2 Chromatic trumpets – The pitch of the instrument can be altered mechanically
423.21 Keyed trumpets – Ophicleide.
423.22 Slide trumpets – Trombone.
423.23 Valved trumpets – French horn, euphonium, baritone horn, trumpet, and tuba.
423.231 Conical bore
423.232 Semi-conical bore
423.233 Cylindrical bore
Unclassified aerophones [43]

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