Psychoacoustics is the study of how humans perceive sound. It explores the relationship between physical sound waves and the psychological responses they evoke. This field examines various aspects of hearing, including pitch, loudness, and timbre, and how these elements influence our experience of music and speech. Researchers in psychoacoustics investigate phenomena such as masking, where louder sounds can make softer sounds inaudible, and auditory illusions, which reveal how our brains interpret complex auditory information. Understanding these principles helps improve audio technology, hearing aids, and sound design in various media.