Headphones are used to deliver narrow band noise masking when there is a difference of what dB or greater?

Prepare for the Georgia Hearing Aid Dispenser Test with audiogram resources. Use our flashcards and multiple-choice questions featuring hints and explanations to get exam-ready!

The correct answer is the option indicating a 40 dB difference for using headphones to deliver narrow band noise masking. This specific threshold is established based on the principle that significant differences in hearing thresholds between the two ears can lead to problems such as lateralization or cross-hearing during audiometric testing.

When there is a difference of 40 dB or more, it is likely that the non-test ear may respond to the sounds presented to the test ear. Using narrow band noise through headphones helps mask the sound for the non-test ear, ensuring that the test results reflect the hearing ability of the test ear alone. This is particularly important in situations where accurate measurement of hearing thresholds is required, such as pre-fitting of hearing aids or in a clinical evaluation setting.

This approach ensures that the test results are valid and reliable, minimizing the potential for crossover and improving the accuracy of the audiologic assessment.

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