Related Experiment Video
Updated: Jul 19, 2026
07:52
An Automated System for Sound Localization Testing in Hearing-Impaired Listeners
Published on: March 13, 2026
Dynamic shifts in the owl's auditory space map predict moving sound location
Ilana B Witten1, Joseph F Bergan, Eric I Knudsen
1Department of Neurobiology, Stanford University Medical School, Stanford, California 94305, USA.
Nature Neuroscience
|October 3, 2006
Summary
The barn owl's auditory space map dynamically shifts with sound motion, compensating for delays. This adaptive neural map may predict future sound locations, a finding potentially applicable to the wider central nervous system.
Area of Science:
- Neuroscience
- Auditory processing
- Computational neuroscience
Background:
- The optic tectum in barn owls (Tyto alba) possesses a spatial map of auditory information.
- Understanding how this map represents and responds to dynamic auditory stimuli is crucial for comprehending sensory-motor integration.
Purpose of the Study:
- To investigate the dynamic properties of the auditory space map in the barn owl's optic tectum.
- To determine if the map adapts to the velocity of moving sound sources.
- To propose a computational model explaining these adaptive shifts.
Main Methods:
- Electrophysiological recordings were used to map auditory receptive fields in the optic tectum of barn owls.
- Sound stimuli of varying velocities were presented to assess receptive field shifts.
- A computational model was developed to simulate and explain the observed neural responses.
Main Results:
- Auditory receptive field locations shifted towards approaching sound sources.
- The magnitude of these shifts correlated systematically with stimulus velocity.
- These shifts effectively compensate for sensory and motor delays in auditory orientation.
Conclusions:
- The auditory space map in the barn owl's optic tectum is not static but dynamically adapts to sound motion.
- The observed adaptive shifts suggest predictive processing within the neural circuitry.
- This predictive mechanism may be a widespread principle in the central nervous system, relevant to human sensory perception.
Related Concept Videos
01:21Perceiving Loudness, Pitch, and Location
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...
01:01Perception of Sound Waves
The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...
01:17Auditory Perception
The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...
01:15Auditory Pathway
Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
01:13The Cochlea
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
00:56Doppler Effect - I
The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...