Infant hearing is an important indicator of infant language and communication development. During the first few months of a baby\’s life, their hearing system is developing and growing, so early detection and evaluation of infant hearing problems is crucial. This article will introduce the simplest way to determine a baby\’s hearing. 1. Auditory behavioral observation method The auditory behavioral observation method is a very simple method that can judge the hearing of babies by observing their reaction to sounds. The basic idea of this method is to observe the baby\’s orientation to sound, find the source of the sound and respond. This reaction includes eye movements, head turns, and body movements. When conducting auditory behavioral observation, sound stimuli of different frequencies and volumes need to be used to determine the baby\’s response to different sounds. This method is particularly suitable for newborns and very young babies. 2. Auditory evoked potential Auditory evoked potential is a very accurate method that can measure infant hearing. This method exploits electrophysiological responses in the infant\’s auditory system. When a baby hears a sound, the auditory nerve produces specific electrical signals that can be detected by placing electrodes on the baby\’s scalp. Auditory evoked potentials can detect the baby\’s response to sound, including the intensity, frequency and duration of the sound. The latest and most complete 2023 [Kindergarten, Junior High and High School] premium VIP course catalogs from famous teachers in various disciplines on the entire network, click to view now! 3. Free-field response Free-field response is a new method that can measure the hearing of infants in their natural environment. This method uses radio transmission technology and small sensors to record babies\’ responses to sounds in their natural environment. This method can provide more accurate information because it can capture the baby\’s response to different sounds, such as speech, music and environmental noise. In short, the easiest way to judge a baby\’s hearing is to use auditory behavioral observation. This method is very simple and can determine the hearing status of babies by observing their reaction to sounds. For more accurate measurements, methods such as auditory evoked potentials or free-field responses can be used. These methods can provide more accurate information to help doctors and parents better understand their infant\’s hearing status.