When should mid-octave frequencies be tested?

Mid-octave frequencies should be tested when there is a 20 dB difference in adjacent octaves because this practice helps ensure that important changes in a person's hearing ability are properly identified. Testing mid-octave frequencies provides more detailed information about a patient's hearing profile, particularly in cases where a significant gap exists between the results of the adjacent octave frequencies. This is especially critical in hearing evaluations as it allows for a more complete understanding of any potential hearing loss. By testing these frequencies, audiologists can more accurately assess a patient's hearing and tailor interventions accordingly.