Human hearing extends over a vast intensity range of _______________ dynes/cm^2.

The correct choice indicates that human hearing extends over a vast intensity range of 0.0002 to 1000 dynes/cm². This range effectively captures the sensitivity of human hearing, which can detect incredibly faint sounds at very low intensity levels (around 0.0002 dynes/cm²) and can tolerate much louder sounds up to about 1000 dynes/cm². This is significant because it reflects the remarkable ability of the human auditory system to process and respond to a wide variety of sound intensities, contributing to our ability to perceive differences in volume and discern nearly imperceptible sounds in our environment.

Understanding this intensity range is essential for hearing aid specialists, as it informs the design and fitting of hearing aids, ensuring they can amplify sounds appropriately without causing discomfort or damage to hearing. The correct intensity range underscores both the dynamic range of human hearing and the importance of considering this range when mitigating hearing loss.