Related Experiment Video
Updated: Jul 15, 2026
09:44
Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
Published on: January 25, 2016
Measurement of first- and second-order modulation detection thresholds in listeners with cochlear hearing loss
S Tandetnik1, S Garnier, C Lorenzi
1Laboratoire Claude, Versailles, France.
British Journal of Audiology
|February 19, 2002
Summary
Hearing-impaired listeners show normal detection of sinusoidal amplitude modulation (SAM) up to 16 Hz, with some deficits at higher frequencies. Second-order modulation detection remains largely intact, suggesting cochlear damage minimally impacts temporal envelope processing.
Area of Science:
- Auditory Neuroscience
- Psychoacoustics
- Audiology
Background:
- Auditory processing relies on detecting temporal envelope fluctuations.
- Understanding how hearing impairment affects modulation detection is crucial for audiological rehabilitation.
- First-order and second-order modulation detection assess different aspects of temporal processing.
Purpose of the Study:
- To compare first- and second-order modulation detection thresholds in normal-hearing and hearing-impaired listeners.
- To investigate the impact of hearing impairment on the detection of sinusoidal amplitude modulation (SAM) and complex temporal envelopes.
- To determine if cochlear damage affects the processing of different temporal modulation frequencies.
Main Methods:
- Measured first-order modulation detection thresholds as a function of modulation frequency (f(m)) from 4 Hz to 32 Hz.
- Measured second-order modulation detection thresholds as a function of second-order modulation frequency (f(m)') from 1 Hz to 11 Hz, with a fixed f(m) of 16 Hz.
- Compared thresholds between normal-hearing and hearing-impaired listener groups.
Main Results:
- Hearing-impaired listeners exhibited normal first-order thresholds up to f(m) = 16 Hz, but poorer thresholds at 32 Hz.
- Second-order thresholds were normal for f(m)' = 3, 5, and 11 Hz, but poorer at 1 Hz and 7 Hz in hearing-impaired listeners.
- Results indicate preserved detection abilities for certain modulation frequencies despite hearing loss.
Conclusions:
- Cochlear damage appears to have minimal impact on the detection of both sinusoidal and complex temporal envelopes.
- Hearing impairment may affect temporal processing, particularly at lower second-order modulation frequencies.
- These findings contribute to understanding the functional consequences of hearing loss on auditory perception.
More Related Videos
14:05Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
Published on: January 23, 2017
09:54Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea
Published on: May 10, 2019
Related Concept Videos
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.
00:53Sound Intensity Level
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 hence a...
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 hence a...
01:19Second-order Op Amp Circuits
Implementing second-order low-pass filters in audio systems is crucial in refining audio signals by eliminating undesirable high-frequency noise. These filters typically involve second-order op-amp circuits configured as voltage followers, encompassing two nodes with distinct storage elements.
The analysis of such circuits follows a systematic approach, similar to the second-order RLC circuits. In practical scenarios, bulky inductors are rarely employed due to their size and weight. This means...
The analysis of such circuits follows a systematic approach, similar to the second-order RLC circuits. In practical scenarios, bulky inductors are rarely employed due to their size and weight. This means...
01:21Sensation
Sensory receptors are specialized neurons that respond to specific types of external stimuli, initiating the process known as sensation. This occurs when sensory input, such as light entering the eye, is detected by these receptors, causing chemical changes in the cells of the retina. These cells then convert the sensory stimulus into action potentials that are transmitted to the central nervous system, a process termed transduction.
Absolute thresholds can quantify the sensitivity of sensory...
Absolute thresholds can quantify the sensitivity of sensory...
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...