In this study, the air and bone conduction threshold results obtained with the GSI-61 audiometer were compared with thresholds obtained with the KUDUwave™ PC based audiometer. The test-retest reliability was also assessed and compared. This was done in order to validate the KUDUwave's air conduction and forehead bone conduction audiometry tests results. All tests were conducted in a sound-treated booth.
Air conduction thresholds for the two audiometers corresponded within 5 dB or less. Whilst bone conduction thresholds corresponded with 10 dB or less. Occlusion effect may have influenced BC thresholds in this study. The researcher minimized the occlusion effect by deeply inserting the earphones down to the bony areas during BC testing. However, the insertion may not have been deep enough.
The average absolute test-retest threshold difference for bone conduction on the industry standard audiometer was 5.1 dB (5.3 SD) and for the computer-based audiometer 7.1 dB (6.4 SD). Computer-based audiometry provided air and bone conduction thresholds within the test-retest reliability limits of industry standard audiometry.