What does the X represent on an audiogram?

On an audiogram, the "X" symbol specifically represents the response of the left ear when assessing an individual's hearing ability. This convention is widely used in audiometric testing to distinguish between the hearing responses from each ear. Typically, the "O" symbol is used to indicate the right ear's response.

Utilizing these distinct symbols allows audiologists and hearing professionals to clearly chart and analyze air conduction thresholds of each ear separately. The clarity of this representation is crucial for diagnosing hearing loss and planning appropriate interventions, such as recommending hearing aids or other auditory devices. Therefore, recognizing the significance of the "X" on an audiogram is essential for anyone involved in audiology or hearing aid dispensing practices.