What symbol indicates unmasked bone conduction for the left ear?

The symbol that indicates unmasked bone conduction for the left ear is represented by a left-facing arrow, which is the correct answer. In audiometry, specific symbols are used to denote different types of hearing tests, and the arrows are indicative of bone conduction thresholds.

In this case, the left-facing arrow (C) signifies that bone conduction testing on the left ear has been performed without masking. Masking is used to ensure that the test results are valid by eliminating cross hearing from the other ear. The unmasked bone conduction test results are crucial for accurately diagnosing the nature of hearing loss.

Understanding the symbols is important for the interpretation of audiograms and ensuring clear communication regarding a patient's hearing status. The symbols used for the left ear are distinct and follow standardized conventions in audiological practice, aiding audiologists in recording and conveying information effectively.