PSYC10003 Lecture Notes - Lecture 8: Lateral Sulcus, Central Sulcus, Stirrup
Document Summary
Sound waves: amplitude = loudness (larger amplitude is louder, frequency = pitch (waves occuring more often per second = higher pitch) Complexity = timbre/sound quality (the more small peaks and small troughs in the waveform. The smoother the waveform, the more pure it is. ) Structure of the ear: the outer ear, fleshy pinna, auditory canal, tympanic membrane, middle ear, ossicles (3 tiny bones, malleus (hammer) is connected to the tympanic membrane, vibrations received by the stapes (stirrup) connected to the cochlea. Incus (anvil) transmits the vibrations of the malleus: inner ear, cochlea (contains the receptors for analytic sounds) This bending produces receptor potentials that convert soundwaves into neural signals: tectorial membrane (a rigid shelf over the top, stapes connects to the oval window, round window allows fluid to move. Basilar membrane: higher frequency vibrates hair near the base, lower frequency vibrates hair near the apex.
