The basic principle of note production in a horn is to set up a stationary wave in an air column.
For the lowest note produced by a horn, a node is formed at the mouthpiece and the antinode is formed at the bell. The frequency of this note is 75 Hz.
What are the frequencies of the next two higher notes for this air column?
1 )
A
2 )
B
3 )
C
D
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