| Timing: Used
to locate sound sources |
|
|
|
|
|
|
|
|
|
| • | Not
PERCEIVED directly, but critical for |
|||||||
| LOCATING
sources of sound in space: |
||||||||
| – | Interaural
Time Difference (ITD) as a source moves away from the |
|||||||
| midsaggital
plane. |
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
| – | Adult
humans: maximum ITD is 700 |
||||||||||
| microseconds. |
|||||||||||
| – | We
can locate sources to an accuracy of a |
||||||||||
| few
degrees. This means we can measure |
|||||||||||
| ITD
with an accuracy of ~ 10 |
|||||||||||
| microseconds |
|||||||||||
| – | Thus,
auditory system needs to keep |
||||||||||
| track
of time to the same accuracy. |
|||||||||||
| – | Unique
to auditory system (vs. visual |
||||||||||
| or
touch) |
|||||||||||