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Which of the following frequencies of sound waves is audible?

Correct answer: B. 5000 Hz

  • A. 5 Hz
  • B. 5000 Hz
  • C. 2500 kHz
  • D. 50 kHz

Explanation

Humans can detect sounds in a frequency range from about 20 Hz to 20 kHz. (Human infants can actually hear frequencies slightly higher than 20 kHz but lose some high-frequency sensitivity as they mature; the upper limit in average adults is often closer to 15-17 kHz.)

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About Waves

Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.

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