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Regular Interval Sounds (RIS)

Here are two examples of Regular Interval sounds (RIS) and a comparable noise, The RIS were constructed using a 16 ms delay and 8 iterations.
  • Noise
  • RIS with a fixed pitch
  • RIS that plays a melody

This figure shows the auditory images of RIS constructed in AIM, with the associated autocorrelograms.

  • Patterson, R. D., Uppenkamp, S., Johnsrude, I., and Griffiths, T. D. (2002). The processing of temporal pitch and melody information in auditory cortex, Neuron, 36, 767-776.

These brain images show the activity produced by RIS in auditory cortex.