Neuroscience Animations

John H. Krantz, Hanover College, krantzj@hanover.edu

Using the Media

Topics

Neurons

Psychophysics

Vision

Audition

Skin Senses

Statistical Concepts

Hanover College
Psychology Department

Audition

• Processing frequency
  • Ohm's Acoustical Law.  Experience how our auditory system can hear individual frequencies out of a complex tone. (Try Missing Fundamental from ISLE)
  • Fourier Analysis in Audition.  Illustration of how Fourier Analysis can break down a complex waveform into the individual frequencies. (Try Fourier Analysis in Audtion from ISLE)
  • The Decibel Scale.  Get a sense of the perceptual significance of the decibel scale by hearing sequences of tones differing by different numbers of decibels. (Try The Decibel Scale from ISLE)
• The encoding of frequency
  • The Place Theory.  See how different frequencies impact the travelling wave which forms the basis of place theory. (Try Place Code Theory from ISLE)
  • Frequency Theory.  See how the frequency of a stimulus is related to the firing rate of a single neuron which forms the basis of frequency theory. (Try Temporal Code Theory from ISLE)
  • Volley Principle.  Illustration of how having multiple neurons allows the encoding of higher frequency tones in Frequency Theory.
• Masking
  • Tone Masking.  Examine what it takes for one tone at one frequency to block the perception of a tone at another frequency.  this is called Tone Masking.  It turns out that it is easier to for a tone of a lower frequency to mask a tone of a higher frequency than in the opposite situation.
  • The Ear and Tone Masking.  See an illustration of how tone masking works by viewing the impact of two tones on the motion of the basilar membrane in the cochlea. (Try The Basilar Membrane and Fourier Analysis from ISLE)

Neuroscience Animation Home