Generally speaking, auditory development in healthy individuals progresses through eight stages.
① Auditory awareness refers to the ear's innate response to sound.
② Auditory attention involves conscious listening, incorporating psychological factors. Training at this stage is crucial for cultivating listening interest and habits in deaf children.
③ Auditory localization involves identifying the direction of a sound source. Normal infants develop the ability to locate sounds by four months of age.
④ Auditory discrimination enables distinguishing similarities and differences between various sounds.
⑤ Auditory memory involves simultaneously remembering sound signals and their meanings through comprehensive analysis by the cerebral cortex.
⑥ Auditory recognition allows for the identification of familiar sounds.
⑦ Auditory discrimination at higher levels involves distinguishing subtle differences between sounds.
⑧ Auditory discrimination at advanced levels enables the identification of complex sound patterns and rhythms.
④ Auditory Discrimination involves distinguishing similarities and differences between various sounds.
⑤ Auditory Memory entails simultaneous retention of sound signals and their meanings through comprehensive analysis by the cerebral cortex, building upon auditory discrimination.
⑥ Auditory Selectivity is the ability to selectively focus on a specific sound among multiple sounds, enabling the perception of desired auditory stimuli.
⑦ Auditory feedback refers to the self-adjustment process when deaf children produce speech sounds. Human speech pitch and volume are regulated through auditory feedback.
⑧ Auditory concepts involve, based on the preceding seven stages, the brain's cognitive activity to comprehend the essence of sound signals—not merely hearing but understanding.