The clinical practice guidelines for pediatric hearing aid fitting issued by the American Academy of Audiology highlights that hearing aid fitting must be based on a thorough and accurate diagnosis and testing of hearing sensitivity, and that successful hearing aid fitting must be based on the degree and characteristics of a child’s hearing loss. 1. Pediatric Behavioral Audiometry (BOA) (0-6 months) 2. Visual Reinforcement Audiometry (VRA) (6 months-2 years) 3. Play Audiometry (PA) (>2 years) The gold standard for hearing testing in younger children is behavioral audiometry, which is the primary means of diagnosis and hearing aid fitting for children in audiologically developed countries. Electrophysiological testing Electrophysiological testing includes auditory brainstem response (ABR) and auditory steady-state potential (ASSR), etc. It also involves the use of acoustic impedance, stapedius reflex and otoacoustic emissions to determine the type of hearing loss. The American Infant and Toddler Hearing Consortium believes that accurate electrophysiological predictions are necessary for fitting children under 3 years of age with hearing aids, but these results are not sufficient for accurate fitting of hearing aids. Generally speaking, electrophysiological audiometry (nHL) results are often higher than the actual hearing threshold (HL) of behavioral audiometry, and some non-professionals who judge children’s hearing thresholds based on electrophysiological test results alone when fitting children in clinical settings often result in over-amplification of hearing aids due to overestimation of hearing thresholds. Over-amplification of hearing aids may damage the child’s residual hearing. Therefore, the best way to avoid this risk is to use a combination of subjective and objective tests in order to accurately assess the child’s hearing condition, so that the child’s residual hearing can be fully utilized and positive interventions can be taken to achieve better rehabilitation results.