Waves and Sounds

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Notes in a Trombone


Wind instruments create sound based on standing pressure waves within the instrument. Different notes are selected by changing the length of the air column (typically the distance from mouthpiece to open end). The air column in trombone is about 2.7 m for the note C (130.8 Hz, in 2nd octave).

To change to the note B (123.47 Hz), the length needs to