Related Experiment Video
Updated: Jul 16, 2025
07:14
A Method to Study Adaptation to Left-Right Reversed Audition
Published on: October 29, 2018
6.6K
Auditory vertical localization in the median plane with conflicting dynamic interaural time difference and other
Bosun Xie1, Lulu Liu1, Jianliang Jiang1
1Acoustic Lab, School of Physics and Optoeletronics, South China University of Technology, Guangzhou, 510641, China.
The Journal of the Acoustical Society of America
|September 18, 2023
Summary
Dynamic interaural time difference (ITD) and spectral cues aid vertical sound localization. Dynamic ITD is key at low frequencies, while spectral cues dominate at high frequencies, with neither cue fully dominating wideband stimuli.
Area of Science:
- Auditory perception
- Psychoacoustics
- Human auditory system
Background:
- Interaural time difference (ITD) and spectral cues are crucial for sound localization.
- The relative contributions of dynamic ITD and static spectral cues to vertical localization remain unclear.
- Static spectral cues have been traditionally considered dominant for vertical localization.
Purpose of the Study:
- To investigate the distinct contributions of dynamic ITD and static spectral cues to vertical localization in the median plane.
- To determine how these cues interact when presented with conflicting spatial information.
Main Methods:
- Psychoacoustic experiments were conducted using a dynamic virtual auditory display.
- Head-related transfer functions were modified to create binaural signals with conflicting cues.
- Stimuli featured either static or dynamically modified spectral cues alongside dynamic ITD, varying with head position.
Main Results:
- Dynamic ITD significantly contributes to vertical localization at low frequencies.
- Static spectral cues are important for vertical localization at high frequencies.
- Conflicting cues in wideband stimuli typically result in perception of two separate sources, not fused localization.
Conclusions:
- Dynamic ITD and static spectral cues contribute to vertical localization in distinct frequency ranges.
- Neither cue unilaterally dominates vertical localization for wideband auditory stimuli.
- The auditory system processes low-frequency dynamic ITD and high-frequency spectral cues separately for vertical localization.
Related Concept Videos
01:21Perceiving Loudness, Pitch, and Location
239
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...
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...
239
01:13The Cochlea
45.2K
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.
45.2K
01:15Equilibrium and Balance
4.8K
The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
4.8K
01:15Auditory Pathway
5.5K
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...
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
5.5K
01:06Echo
534
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
534
01:15Depth Perception and Spatial Vision
709
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
709