Page 10 - Sound Wave Module
P. 10
An organ pipe of length L is
formed by 3/2 waves, where
L = 3/2 λ then λ = 2/3 L
The 2nd overtone equation is
SECOND UPPER TONE
Based on the data above, it can be concluded that the frequency of the nth upper tone in an open
organ pipe can be determined by the formula
The ratio of the frequency of the tones produced by the sound source in the form of an open organ
pipe to the frequency of the underlying tone is an integer by comparison
B. Closed Organa Pipe
Closed organ pipe is characterized by one end of the pipe being closed.
TONE WAVE EQUATIONS
If a 1/4 wave forms along the
organ pipe, the tone it
produces is called the
fundamental tone
L = ⁄ λ then λ = 4L
The closed organ pipe
FUNDAMENTAL TONE equation for the fundamental
note is
