PSY345H5 Lecture Notes - Lecture 6: Helen Keller, Cochlear Implant, Subwoofer
Document Summary
Helen keller: reflected on her own life. 16th century: first attempt to educate deaf people. There were investigations as to whether death people were able to speak and think and hear. The ear converts that physical energy into sound. Sound is this wave of air pressure. Higher amplitude: higher sound decibel is the unit of measurement for sound. Pitch (audible representation) how many of these waves occur within a unit of time: 20 000 hz old aged people cannot hear it. Timbre: quality of sound where sound could be nasal or forced: they produced different shaped waves, sounds are harmonic. Cochlea: hair cells are located throughout the cochlea: each area is responsible for the perception of a different frequency. Superimposed a child"s audiogram on this banana shaped audiogram. Acoustics of sound and the anatomy of the human hearing process. Hearing loss may vary in intensity at different frequencies audiogram.
