Lecture 5 Slides - Review Auditory Sensitivity and Masking...

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Unformatted text preview: Review: Auditory Sensitivity and Masking z No such thing as all-or-none threshold for hearing z Best sensitivity between 1.0-4.0 kHz z Threshold for change in intensity, 1dB z Threshold for change in frequency, 0.2% z Phase affects quality of sound through interference z Masking: Failure of frequency analysis z Only small critical band of frequencies surrounding the signal frequency produce masking. z Masking not simply related to loudness Spatial Hearing z Are two ears better than one? z Why not three ears? z What’s the smallest change in a sound’s location that we can detect? z What are the auditory cues for location? z What makes a sound appear outside of our head? Co-ordinates +90-90 180 T Azimuthal Angle, T Duplex Theory +- +- A m p lit u d e A m p lit u d e < 2000 Hz R L L R For wavelengths greater than the diameter of the head ( f < 2000 Hz) The primary cue for localization is an interaural time difference ....
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Lecture 5 Slides - Review Auditory Sensitivity and Masking...

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