What does an audiogram display?

An audiogram is specifically designed to convey the relationship between vibration frequency, measured in Hertz (Hz), and the minimum sound intensity, measured in decibels (dB), that a person can hear. This graph provides a visual representation of an individual's hearing ability across different frequencies, pinpointing areas where they may have hearing loss or sensitivity.

While options discussing sound frequency and duration or environmental sound levels refer to sound characteristics, they do not directly relate to the purpose of an audiogram, which focuses on the hearing thresholds at various frequencies. Similarly, whereas visual representation of inner ear function might imply assessments of ear anatomy or motion, it does not characterize the individual’s hearing capabilities as represented in an audiogram. Thus, the primary function of an audiogram is to chart these thresholds and highlight the power needed for various frequencies to be heard by an individual, making choice C the most accurate description of its content.