What is the faintest sound a human can hear measured in watts per square centimeter?

The faintest sound a human can hear, known as the threshold of hearing, is measured at approximately 10^-12 watts per square centimeter, which is commonly referred to in acoustics. However, in terms of the provided options, 10^-16 watts per square centimeter is often used to represent increasingly faint sounds, positioning it within a plausible range for the faint sounds humans can perceive under ideal conditions.

This particular measurement demonstrates the logarithmic nature of sound perception, where small changes in power can manifest as significant differences in perceived loudness. Although the threshold can depend on various factors, including individual hearing sensitivity and ambient noise influences, this specific value illustrates the concept of sound intensity levels relative to human auditory capabilities.

The other options either fall outside the generally accepted threshold for human hearing or increase the power level beyond what is typically perceivable by the average human ear.