SHS 170 Lecture Notes - Lecture 13: Ear Canal, Outer Ear, Logarithmic Scale
9 Dec 2016
School
Department
Course
Professor
Document Summary
Vibration that travels through the air or another medium and can be heard by the listener: vibration source: anything can vibrate in a frequency to a listener ex. Number of cycles per second is on hertz-hz: amplitude: maximum displacement in the positive and negative direction. Simple sounds: vibrates at a single (frequency ex. Complex sounds: vibrations that contain two or more frequencies, nearly all sounds in real world are complex ex, speech, music, applause. Human hearing range: normal range 20 hz to 20,000 hz. Anatomy of human auditory system: peripheral auditory system. Auricle or pinna (can touch: cartilaginous structure, collects and directs sound waves into external auditory canal (funnels the sound into the ear) Tympanic membrane: separates the outer ear and the middle ear structures, vibrates back and forth as the sound waves strike, transmits sound from the outer to the middle ear. Middle ear cavity: extends from the tympanic membrane to the inner ear.
