Hearing (Sound Properties, Theories of Pitch, Other Properties)

Chapters 1/2 Psych Test

Loudness

The perceived intensity of sound, determined by amplitude

Pitch Perception

How the brain interprets frequency to determine high/low sounds

Wavelength

Shorter wavelength=higher pitch; Longer wavelengths =lower pitch

Place Theory

Different parts of the cochlea vibrate for different frequencies (Best for high pitches)

Frequency theory

Pitch is determined by how fast auditory neurons fire (best for low pitches)

Volley Theory

Groups of neurons fire in coordinated bursts to handle pitches too fast for one neuron alone

Sound Localization

Ability to find where a sound is coming from using differences between the two ears

Conduction Deafness

Hearing loss caused by damage  to the outer or middle ear structures that conduct sound

Sensorineural Deafness

Damage to hair cells in the cochlea or the auditory nerve; often permanent