When an open pipe is played and a note is heard
- the lowest frequency of the note is called second harmonic.
- resonance occurs with standing waves set up inside the pipe.
- the fundamental frequency is always twice the pipe diameter.
Explanation from PART66Online
A note sounds from an open pipe when the air column resonates, forming standing waves at the pipe's natural frequencies with antinodes at the open ends. The lowest of these is the fundamental, the first harmonic, not the second, and the fundamental depends on pipe length rather than diameter.
S
santro asked · 16 Aug 2015
please explain.
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