Final answer:
A 12 Hz frequency does not correspond to typical audible sounds as it falls below the human hearing range, which is 20 Hz to 20,000 Hz. Therefore, none of the provided sound options are associated with a 12 Hz frequency.
Step-by-step explanation:
The question asks about the sounds associated with the 12Hz frequency. Human hearing ranges from 20 Hz to 20,000 Hz. Therefore, a 12 Hz frequency would generally be too low to be heard by the average human ear. Since it falls below the human hearing range, it would not be associated with typical audible sounds like whispering, birdsong, thunder, or human speech.
The minimum amount by which frequencies must vary for humans to be able to distinguish two separate sounds is approximately 100 Hz. The measurement units for the loudness and frequency of sound are decibels (dB) and hertz (Hz), respectively. It's important to note that the frequency mentioned in the question does not correspond to the sounds provided in the options (whispering, birdsong, thunder, or human speech).