What are the 2 theories of pitch perception?
Two rival theories have slugged it out over the years: ‘place theory’, in which pitch is determined by which neurons are active, and ‘temporal theory’, in which pitch is determined by how the neurons are active, specifically in terms of their temporal firing patterns.
What is place pitch?
“Place pitch” commonly refers to the perceived difference produced by presenting the same stimulus to different intracochlear electrodes; CI listeners are usually able to scale their electrodes from “low pitch” to “high pitch” when stimulating progressively more basal contacts.
Who proposed the place theory of pitch perception?
Hermann Ludwig Ferdinand von Helmholtz
A theory of pitch perception first proposed in 1865 by the German physiologist, physicist, and mathematician Hermann Ludwig Ferdinand von Helmholtz (1821–94) according to which the perceived pitch of a tone depends on the position or place on the basilar membrane of the auditory receptors that transmit nerve impulses.
What are the three different theories regarding perceiving pitch?
Several theories have been proposed to account for pitch perception. We’ll briefly discuss three of them here: temporal theory, volley theory and place theory.
What is the difference between frequency and place theories of pitch?
Sounds come into the ear as acoustical signals and are later transformed into nerve impulses by the cochlea. The auditory nerve transfers these nerve impulses to the brain. Frequency theory of hearing can only account for sounds up to 5,000 hertz. The place theory of hearing accounts for sounds at or above 5,000 hertz.
What does place theory explain?
Place theory is a theory of hearing that states that our perception of sound depends on where each component frequency produces vibrations along the basilar membrane.
What is meant by place theory?
What is an example of place theory?
For example, a sound that measures 6,000 hertz would stimulate the spot along the basilar membrane that possesses a characteristic frequency of 6,000 hertz. The brain detects the pitch based on the position of the hair cells that transmitted the neural signal.
What is the basic idea of the place theory?
What does the place theory of pitch perception?
What is ITD and ILD?
The information embodied in interaural time differences (ITDs) and interaural level differences (ILDs) (a) allows listeners with normal hearing (NH) to locate sound sources on the horizontal plane, and (b) has a significant role in generating high levels of speech recognition in complex listening environments, for …
How is pitch coded in place theory?
Temporal Code Theory: According to temporal code theory, the location of activity along the basilar membrane is irrelevant. Rather, pitch is coded by the firing rates of nerve cells in the audotry nerve.