Auditory Filtering

Auditory hypersensitivity and language-processing difficulty can serve survival by improving detection of predator-like cues while impairing social communication. Auditory filtering problems may be common, especially with age, developmental disabilities, or mental health disorders. Middle ear muscles help filter sound by dampening low-frequency sounds. Polyvagal theory emphasizes brainstem regulation of peripheral structures in auditory filtering. Low-frequency sound that is not dampened can mask speech frequencies and make voice discrimination difficult. Low-frequency vibration and sound in buildings can shift physiological state and create discomfort without conscious identification as sound.