❌: how many waves in a second? Corresponds to ❌. ❌: how high is the wave? Corresponds to ❌. ❌: how far through the wave are we? Corresponds to ❌.
In complex sounds, the component with the frequency is called the 'fundamental'.
If a filter is linear it follows the rules:
Output of filter doesn't contain any frequency which was not present in input
Output of filter is able to be distorted, so long as the fundamental stays constant
If amplitude of input is changed by some factor, the output must also be changed by the same factor
Output of (A+B+C) == (A) + (B) + (C)
Select the reasons out ear could be considered a Fourier Analyser.
Auditory filters separate frequencies into different channels
Two tones result with merged peaks
Responds to amplitude within each channel
Otoacoustic emissions
Can encode phase information
The role of outer hair cells
Outer Ear: ❌, ❌ Middle Ear: ❌, ❌ Inner Ear: ❌
How many hair cells protrude from the basilar membrane?
1000
2500
3500
5000
Parts of the wave where air pressure is increased are called compressions rarefactions( compressions, rarefactions ); parts where the pressure is decreased are called rarefactions compressions( rarefactions, compressions ).
The inner ear contains mechanoreceptors for:
Hearing
Understanding
Balance
Positioning
Pain receptors
The chambers in the cochlea are the:
Scala vestibuli
Tympanic membrane
Basilar Membrane
Scala tympani
Cochlear partition
Phase locking is important for:
Sound localisation
Pitch perception for low frequencies
Pitch perception for high frequencies
An auditory nerve fibres response to a tone during the presentation of a second tone is
To double the intensity
Suppression
Double the amplitude but not frequency
Double the frequency but not amplitude
The Superior Medial Inferior Lateral( Superior, Medial, Inferior, Lateral ) Olive contains binaural neurons that provide information about the location of sound sources.
