청각사, or "Hearing History," is a field of study that focuses on the significance and evolution of sound in human experience. It examines how people have perceived, understood, and interacted with sound throughout history, including music, speech, and environmental noises. This discipline often intersects with areas like musicology, cultural studies, and acoustics. Researchers in 청각사 analyze historical documents, artifacts, and recordings to uncover how sound has shaped societies and cultures. They explore topics such as the development of musical instruments, the role of sound in rituals, and the impact of technology on auditory experiences. This field helps us appreciate the rich tapestry of sound in our lives.