Question

if the fundamental frequency in a closed pipe is 300Hz,find the value of third harmonic in it?​

Answer 1

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The fundamental frequency in a closed organ pipe is 300 Hz

In a closed organ pipe ,

$n_1 : n_3: n_5 : ... \: = 1 : 3 : 5 : ....$

where,

$n_1 = fundamental \: frequency \: or \: \\ first \: harmonic$

$n_3 = third \: harmonic \:$

etc....

here ,

$n_1 / \: n_3 = 1/3$

$300/ n_3 = 1/ 3$

$n_3 = 300 \times 3$

$n_3 = 900$

Hence , the third harmonic is equal to 900 Hz

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