Question

An organ pipe is closed at one end and has fundamental frequency of 1500 hz the maximum number of overtunes generated by this pipe which is normal person can hear is

Answer 1

Answer Frequencies in a closed organ pipe are - v/4L, 3v/4L, 7v/4L etc.

For first overtone, frequency = 3 x 1500 = 4500 Hz

For second overtone, frequency = 5 x 1500 = 7500 Hz

For third overtone, frequency = 7 x 1500 = 10500 Hz

As we go on, the sixth overtone is 13 x 1500 = 19500 Hz.

The limit of audibility is 20000 Hz. Therefore, a maximum of 6 overtones can be heard by a normal person.