What is the primary purpose of narrowband noise in hearing tests?

The primary purpose of narrowband noise in hearing tests is to enhance tone distinction in testing. Narrowband noise consists of a specific range of frequencies, and when used in conjunction with pure tones during audiometric testing, it helps to mask surrounding sounds and allows for a more accurate assessment of an individual's ability to differentiate between different frequencies. This is particularly important in determining the individual's hearing thresholds and understanding how they perceive tones in the presence of competing sounds.

Narrowband noise serves as an effective tool to isolate specific tones during audiometric evaluations, enabling clinicians to obtain clearer and more precise results. This use is fundamental when assessing hearing sensitivity and frequency discrimination, which are crucial components of hearing evaluations. In contrast, other options do not accurately capture the primary application of narrowband noise in audiological tests.