What does "cross over" refer to during hearing tests?

The term "cross over" during hearing tests refers to sound that reaches the non-test ear. This phenomenon occurs when sound presented to one ear is perceived by the other ear, particularly if the sound is loud enough or if there is a conductive or sensorineural hearing loss in the test ear. This can lead to inaccuracies in the assessment of an individual's hearing thresholds because the response might not solely reflect the hearing ability of the ear being tested. Understanding this concept is crucial for audiologists and hearing technicians to ensure that hearing tests are interpreted accurately, taking into account any potential cross-contamination of sound.