What is Bekesy place theory?
VON BÉKÉSY ‘S EXPERIMENTS showed the existence of traveling. waves in the basilar membrane and that maximal displace- ment of the traveling wave was determined by the frequency of the sound (4). The place theory of hearing equates the basilar membrane to a frequency analyzer.
What is Helmholtz place theory?
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. The place theory is usually attributed to Hermann Helmholtz, though it was widely believed much earlier.
What is the problem with the place theory?
The biggest problem of the place theory is that it fails to identify the pitch of a stimulus with missing fundamental. According to Helmholtz’s theory, it is impossible to perceive a pitch when there is no spectral peak at the position along the basilar membrane which corresponds to the frequency of the pitch.
How do we hear according to place theory?
According to the place theory of hearing, we can hear different pitches due to specific sound frequencies causing vibrations in specific parts on the basilar membrane of the cochlea. The brain detects the pitch based on the position of the hair cells that transmitted the neural signal.
What is the frequency theory?
a late 19th-century theory specifying that pitch is coded by the rate at which action potentials are generated by auditory neurons within the basilar membrane of the ear.
What is another word for frequency theory?
Also called the telephone theory. Compare place theory, volley theory.
What do you call a sound waves with frequencies beyond 20000 Hz?
ultrasound
Frequencies above 20,000 Hz are known as ultrasound.
How did Georg Von Bekesy explain place coding?
This was the basis for tonotopic or place coding, in which the hair cells showing the greatest response coded for the fundamental frequency of the sound. von Békésy built a large mechanical model of the inner ear to explain and confirm his hypothesis of how it coded sound.
What did Georg Von Bekesy do for a living?
Beginning in 1928, Georg von Békésy, originally trained in chemistry, devoted himself to one of the great unsolved problems in sensory physiology: how the inner ear converts vibrations into neural impulses.
How did Bekesy come up with his traveling wave theory?
It was the same traveling wave he had seen coursing along the artificial membrane of his model.” “From this work Bekesy evolved his traveling-wave theory: a sound impulse sends a wave sweeping along the basilar membrane.
Who is the scientific evidence for the place theory?
Physiological evidence for the place theory was provided by the Nobel prizewinning Hungarian physicist and physiologist Georg von Békésy (1899–1972) and summarized in his book Experiments in Hearing (1962).