Auditory_Localization_Part_1

Auditory_Localization_Part_1 - Sound localization: Overview...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Sound localization: Overview Visual and auditory localizations pose different problems and are based on different mechanisms, although there are similarities between the two. Binaural cues to azimuth Interaural time differences (ITD) Interaural intensity differences (IID) Monaural cues to azimuth Head movements Information about elevation Patterns of frequencies and intensities in pinna. Information about distance Sound level (works only for known intensities.) Quality of sound: high frequencies are absorbed by air so more distant sounds contain relatively less high frequency components Movement parallax: source moves relative to head more if it is closer Reflections. At greater distances, the amount of indirect sound relative to direct sound increases.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Three coordinates for location Do not forget that the three coordinates are independent of each other : A source at 45o to the right can be above the listener’s head, at ground level, underground, or anywhere in between. It can also be close to the listener or far away. Different perceptual mechanisms allow judging azimuth, elevation and distance.
Background image of page 2
Visual and auditory localizations The brain processes visual and auditory information differently to infer where an object or event is located. E.g., in vision images of objects with different elevations or different azimuths are in different locations on the retina. But in audition, the sound waves coming from those objects “mix” in the
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Acoustic shadow Sound waves with longer wavelengths simply go over the head, without losing much energy.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 10

Auditory_Localization_Part_1 - Sound localization: Overview...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online