Related Experiment Video
Updated: Jul 5, 2026
12:03
A Method for Tracking the Time Evolution of Steady-State Evoked Potentials
Published on: May 25, 2019
Loudness and auditory steady-state responses in normal-hearing subjects
Franz Zenker Castro1, Jose Juan Barajas de Prat, Eneko Larumbe Zabala
1Clinica Barajas, Santa Cruz de Tenerife, Spain. franz@clinicabarajas.com
International Journal of Audiology
|May 10, 2008
Summary
This study shows that multiple auditory steady-state responses (ASSRs) can estimate loudness growth in normal-hearing individuals. ASSR amplitude correlates with perceived loudness, suggesting a potential clinical tool for audiology.
Area of Science:
- Auditory Neuroscience
- Psychoacoustics
- Clinical Audiology
Background:
- Understanding loudness perception is crucial for audiological assessment.
- Electrophysiological measures offer objective insights into auditory processing.
Purpose of the Study:
- To evaluate the utility of multiple auditory steady-state responses (ASSRs) for estimating loudness growth.
- To compare electrophysiological loudness growth with behavioral measures in normal-hearing listeners.
Main Methods:
- Obtained behavioral loudness growth using the contour test.
- Measured electrophysiological amplitude of multi-frequency ASSRs (500-4000 Hz).
- Analyzed intensity functions and their slopes for both measures.
Main Results:
- Both behavioral loudness judgments and ASSR amplitudes increased with stimulus intensity.
- A significant positive relationship was found between loudness perception and ASSR amplitude.
- ASSRs demonstrated a consistent growth pattern across tested frequencies.
Conclusions:
- ASSR amplitude shows promise as an objective measure for estimating loudness growth.
- This method may be particularly valuable for assessing individuals with normal hearing.
- Further research could explore its application in hearing-impaired populations.
More Related Videos
Related Concept Videos
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...
01:21Perceiving 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...
01:31Hearing
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.
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...
00:58Sound Intensity
The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the emitted...
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...