PSYC 2360 Lecture Notes - Lecture 17: Low Frequency, Hair Cell, Vocal Resonation

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2360
• Professor: Carol Anne Hendry

Document Summary

The quietest sound we can hear is 0/0002 dynes/cm2. Db= 20 log (actual sound of sound/ reference intensity sound we can hear) 140- 180 db is the threshold of pain- sounds that hurt your ears: frequency, measured in hertz (hz, hz= cycle/second. Cycle wavepeak: more cycles for higher frequency sounds (cycles are compressed together). All on a sine wave: ho(cid:449) does sou(cid:374)d i(cid:374)tera(cid:272)t (cid:449)ith , object, sound can reflect off of objects when it hits the object ecolocation, objects can absorb sound some more than others. Different types of objects absorb different amounts of sound. Places that echo your voice- like bathrooms- this is because plaster and tile reflect sound. Resonate objects vibrate in symphony to the sound and make sound back. Resonant frequency: frequencies that cause objects to vibrate. Sound can make objects vibrate so that the object will make a sound back. Ex: opera singers make glass break because of how much the glass vibrates.