What does the symbol 'triangle' refer to in audiogram notation?

In audiogram notation, the symbol 'triangle' specifically represents masked air conduction for the right ear. Masking is used in audiometry to ensure that the non-test ear does not hear the test signals during hearing assessments. In the context of an audiogram, air conduction testing indicates how well sound travels through the outer and middle ear structures to the inner ear, which is fundamental to assessing hearing capabilities.

When a triangle is used, it shows that the results for air conduction were obtained while masking was applied to the opposite ear. This is important because it helps to isolate the hearing ability of the ear being tested, providing a more accurate representation of an individual's auditory capacity. Each symbol on an audiogram has specific meanings, and understanding them is crucial for interpreting the results accurately.