The intensity level (sound level) of faintest audible intensity is:
Correct answer: B. Zero decibel
- A. 160 decibel
- B. Zero decibel
- C. 140 decibel
- D. 120 decibel
- E. 60 decibel
Explanation
The faintest audible intensity corresponds to a sound level of: Zero decibel. Zero decibel (0 dB) represents the threshold of human hearing, which is the lowest sound intensity that the average human ear can detect. So option B is the correct answer.
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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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