A pipe has a length of 1m. determine the frequencies of the fundamental and the first two harmonic if the pipe is opened at both end.(speed of sound in air is =340m/s)
Correct answer: A. 170hz, 340hz, 510hz
- A. 170hz, 340hz, 510hz
- B. 120hz, 220hz, 390hz
- C. 90hz, 230hz, 440hz
- D. 210hz, 410hz, 510hz
Explanation
The frequencies of the fundamental and the first two harmonics for a pipe open at both ends are 170 Hz, 340 Hz, and 510 Hz, respectively as per the given formulas in the explanation below.
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About Organ Pipes
Organ pipes produce standing sound waves in air columns, with resonance determined by whether each end is open or closed. The topic covers nodes, antinodes, fundamental frequency, harmonics, wavelength and end correction. Open pipes support all harmonics, while closed pipes support only odd harmonics under the ideal model.
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