Sound Basics.
Illustration of the sound stimulus. Explore the effects of
intensity and frequency on your perception of the sound and the various
features of a sound wave, e.g, compression, rarefaction and phase.
Reception and Transduction
The Middle Ear. See the
working of the ossicles of the middle ear and how their motions depend
upon the frequency of the sound.
The Cochlea. An
illustration of the function of the inner ear in response to sound
stimuli.
The
Ear. Observe the transmission of the sound stimulus through the
ear.
Ohm's Acoustical
Law. Experience how our auditory system can hear individual
frequencies out of a complex tone.
Fourier Analysis in Audition.
Illustration of how Fourier Analysis can break down a complex waveform
into the individual frequencies.
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.
The encoding of frequency
The Place Theory. See
how different frequencies impact the travelling wave which forms the
basis of place theory.
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.
Volley Principle.
Illustration of how having multiple neurons allows the encoding of
higher frequency tones in Frequency Theory.
Auditory Localization
The Head in Sound Space.
Illustration of how sound the travelling of sound to the two ears can
play a role in determining direction.
Time of Arrival and Phase.
Use headphones to experience how the time of arrival or difference in
phase between the two ears can be an a cue to the direction of the
sound.
Relative Loudness.
Use headphones to illustrate to how the relative intensity of sounds in
the two ears can influence the perception of direction of a sound.
