Sound waves are most often the result of periodic compressons of air. THe frequency of a sound is the number of compresssions per second, measured in Hz. Pitch is related to frequency such that higher pitch means higher frequency of the sound wave.
The amplitude of the sound wave related to its intensity and is related to how loudly the sound is perceived. Most adults hear sounds between 15,000-20,000Hz.
1. Identify the frequency and amplitude of the illustrated sound wave.
The compression of air is collected by the outer ear, turned into vibration in the middle ear and transduced in the inner ear.
2. Can you label the structures of the outer and middle ear.
II. TRANSDUCTION
Transduction happens in the cochlear, due to the movement of hair cells on the basilar membrane
.
III. TRANSMISSION PATHWAYS IN THE BRAIN
IV. SENSATION, PERCEPTION, COGNITION
Read and summarize this paper
http://www.nature.com/nature/journal/v416/n6876/full/416012a.html
V. PUT IT ALL TOGETHER- Stimulus, Transduction, Transmission, Sensation, Perception & Cognition
If you are really understand this material, you should be able to easily read the following webites. Once you are comfortable reading the websites below, your next assignment will be to complete the Audition portion of the Sensory Modality chart.
Auditory System Site #1
Go to section 12.2 Sound: Intensity, Freuency, Outer and Middle Ear Mechanisms, Impedance Matching by Area and Lever Ratios.
You are only responsible for understanding the following terms for Section 12.2
*pinna,
*external auditory meatus (ear canal)
*middle ear ossicles - anvil, hammer, stirrup
*tympanic membrane
*oval window
round window
Auditory System site #2
Go to section 13.1- Figure 13.1 and 13.2 and hit "Play" Use this illustration (and your coloring book Figure 8.3). You are responsibile for the pathway structures and functions outlined in your coloring book.
USE THE MARKED TERMS ABOVE (*) AND THE TERMS BELOW IN THE HOMEWORK ASSIGNMENT- CLASS SCHEMA THAT IS DUE APRIL 3, 2014
*15-20,000 Hz
*superior olive
*medial geniculate of the thalamus
*inferior collicullus
*primary auditory cortex
*secondary auditory cortex
*pitch
No comments:
Post a Comment