What type of masking is delivered to the non-test ear using headphones during audiometric testing?

During audiometric testing, narrow band noise is used as a form of masking delivered to the non-test ear. This type of masking is effective because it isolates a specific range of frequencies that may interfere with the test results. By using narrow band noise, audiologists can ensure that the sound presented to the test ear is accurately heard without influence from any sound perceived in the non-test ear.

Narrow band noise is designed to closely target the frequency being tested, allowing for a more precise evaluation of hearing capabilities. It blocks out sound in the non-test ear without affecting the frequencies being tested, thus providing a cleaner and more reliable assessment of auditory function. This is crucial in audiometric procedures, where the goal is to differentiate between true perception of sound in one ear and any potential cross-hearing from the other.