What is the term for the phenomenon that prevents crossover interference when testing hearing in one ear?

The term that describes the phenomenon which prevents crossover interference when testing hearing in one ear is effectively masking. Effective masking occurs when noise is introduced to the non-test ear, ensuring that the sound being presented to the test ear is not heard by the non-test ear. This allows for a more accurate assessment of the hearing ability in the ear being tested, as the masking sound helps to isolate the hearing response and eliminates the chance of sounds crossing over and being heard by the other ear.

In this context, effective masking is essential for obtaining reliable auditory thresholds, especially in individuals with varying degrees of hearing loss. When the noise is appropriately adjusted, it keeps the non-test ear occupied while allowing the audiologist or hearing professional to evaluate the test ear’s hearing without interference.