Class Notes (810,487)
Canada (494,138)
Psychology (6,045)
Prof (28)
Lecture 5

Lecture 5.docx

6 Pages
Unlock Document

Western University
Psychology 2115A/B

Lecture 5 10/1/2012 11:31:00 AM Audition What is a stimulus that causes us to hear?  Movement of air molecules caused by vibration  Example the vibration fork (compressing air molecules) o Molecules go from high pressure/low pressure/high pressure etc.  A sound wave is the patter in the air ( high pressure to low pressure) refer to diagram  Waves travel faster in water, but they don’t travel as far Sound waves  Frequency: o How many times do they repeat themselves in a second o Measure in cycles per second (CPS) or HERTZ o Things that you can here have to be AT LEAST 20 times per second and go up from there  Amplitude: o How much “oomph” was put into the sound o The strength put into the wave o If you want something that has the same frequency but different amplitude : refer to diagram o The BEL scale: measure the oomph that goes into the sound  It is a log scale o Associate to sound intensity is the decibel  Phase: o Characterizes the relationship between sound waves o Have equivalent amplitude and frequency but one could be leading the other o Measured in degrees ( 360 degrees- the time between the two peeks) The sense organ  the sense receptor for audition is the ear  the thing that you see is the outer ear – PINNA o acts as an antenna (grabs the sound waves from the environment)  the goes through the auditory canal o what’s picked up from the environment then goes through the canal o increases pressure so we don’t loose the sound  ear drum- the tympanic membrane o will vibrate from the pressure coming form the canal o the ear drum is in the middle ear ( begins it) o the three bones in the ear- the malleus the incus and the stapes all vibrate o the vibration goes from the bones to the oval window  the osicles o don’t respond to low frequency’s (like your heart beating) o they respond to the vibration off your jaw ( that’s why when you hear your own voice recorded you sound different  the oval window o entering the inner ear, the stapes hit the fluid inside making the vibration (mecha
More Less

Related notes for Psychology 2115A/B

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.