PSYC 212 Lecture Notes - Lecture 15: Inverse-Square Law, Direct Energy, Azimuth

• School: McGill University
• Department: Psychology
• Course: PSYC 212
• Professor: Mathieu Roy

Document Summary

Long wavelengths are more resistant to obstacles (low freq) Linked to the interaural level difference (diff in intensity between a sound arriving at one ear vs the other) Itd"s and ild"s cannot tell us how far away an object is on a given azimuth. Eg. for an azimuth of -60 degrees, itd will always be -480 ms even if in absolute it takes more time for a sound to travel from a farther distance. 10 meters: left ear= 400ms, right ear= 880 ms itd= 480 ms. 100 meters: left ear= 4400 us, right ear= 4880 ms itd= 480 ms. It will take longer to reach both ears, but the itd is the same. Sound amplitude dec as a function of distance, and according to the inverse square law. It"s harder to tell small diff in distance between 2 objects if they are far away than if they are close.