An organic pipe closed at one end is 80cm long. Determine the frequency of the fundamental note assuming that the speed of sound in air is 340ms-1

Atunmise

7 years ago

I can't get the answer very well my self due to this one online

Ann_e

1 year ago

To solve this, we’ll use the formula for the fundamental frequency (first harmonic) of a pipe closed at one end.

For a pipe closed at one end:
• Only odd harmonics are present.
• The fundamental frequency has a quarter wavelength in the pipe:

• Frequency is given by:
lander/4
therefore lander=4L
Given:
• Length L = 80 cm = 0.8 m
• Speed of sound v = 340 m/s
lander=4*0.8m
=3.2m

f=v/lander
=340/3.2
=106
Answer: A. 106 Hz

strongman20

2 years ago

is 4L a constant for frequency?