Related Experiment Video
Updated: Nov 21, 2025
07:32
Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
Published on: September 1, 2016
13.0K
Sensitivity to haptic sound-localisation cues
Mark D Fletcher1,2, Jana Zgheib3, Samuel W Perry3,4
1University of Southampton Auditory Implant Service, University of Southampton, University Road, Southampton, SO17 1BJ, UK. M.D.Fletcher@soton.ac.uk.
Scientific Reports
|January 12, 2021
Summary
Wrist haptic stimulation effectively aids sound localization for hearing-impaired individuals, particularly using intensity differences, which remain sensitive even with aging. This technology offers potential for enhanced virtual reality and robotics.
Area of Science:
- Auditory Neuroscience
- Haptic Technology
- Human-Computer Interaction
Background:
- Hearing aid and cochlear implant (CI) users face challenges in sound localization and segregation.
- Auditory cues like interaural time and intensity differences are crucial for sound localization.
- Previous research indicated haptic stimulation on wrists can improve sound localization for CI users.
Purpose of the Study:
- To investigate wrist sensitivity to temporal and intensity sound localization cues.
- To determine the robustness of this sensitivity to aging.
- To compare haptic cue sensitivity with existing auditory cues and CI capabilities.
Main Methods:
- Participants received haptic stimulation on each wrist to simulate interaural time and intensity differences.
- Sensitivity to these cues was tested across various stimulation intensities and frequencies.
- Performance was compared between younger and older participants, and with normal-hearing individuals' across-ear sensitivity.
Main Results:
- Across-wrist time difference sensitivity was significantly poorer than across-ear sensitivity and declined with age.
- High sensitivity to across-wrist intensity differences was observed, unaffected by age.
- The dynamic range for wrist haptic stimulation was approximately four times larger than for CIs.
Conclusions:
- Wrist-based haptic intensity cues offer a robust and sensitive method for sound localization, suitable for hearing-impaired individuals.
- This technology has potential applications in enhancing virtual reality and remote control systems.
- Further research can explore optimizing haptic feedback for improved auditory perception and human-machine interaction.
Related Concept Videos
01:21Perceiving Loudness, Pitch, and Location
645
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...
645
01:33Somatosensation
42.1K
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
42.1K
01:31Hearing
55.5K
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
55.5K
01:17Auditory Perception
792
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...
792
00:53Sound Intensity Level
4.6K
Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...
4.6K
01:13The Cochlea
49.0K
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.
49.0K