Final answer:
In a hearing exam, the "volume" of sound refers to its loudness, which is measured in intensity level or decibels (dB) and should be kept at a comfortable level. Loudness is influenced by both amplitude and frequency, with 60 dB representing a typical conversational level.
Step-by-step explanation:
On a hearing exam, when we refer to the "volume" of sound, we are actually measuring its loudness. The correct term used to describe the loudness of sound is intensity level or decibel. Therefore, the appropriate level that should be measured during a hearing exam is D) Loudness, and it should be at a comfortable level for the individual being tested. It's important to note that loudness is closely related to the amplitude of the sound wave, with higher amplitudes corresponding to louder sounds. However, loudness is affected not just by intensity but also by frequency, as the ear is less sensitive at very low and very high frequencies.
Loudness is measured in units known as decibels (dB), which is a logarithmic scale used to quantify sound intensity. In addition to frequency and intensity, the perception of loudness has an impact on our overall hearing experience, which can differ from person to person. Sound intensities of a typical conversation usually measure around 60 dB, which is considered a safe and comfortable level, whereas levels around 80 dB and beyond have the potential to cause hearing damage.