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Sound Intensity Level

Sound 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...

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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

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Published on: March 24, 2023

Comparison of Intensity Discrimination between Children Using Cochlear Implants and Typically Developing Children.

Shubha Tak¹, Asha Yathiraj¹

¹Department of Audiology, All India Institute of Speech and Hearing, Mysuru, India.

The Journal of International Advanced Otology

|December 18, 2019

Summary

Children using cochlear implants show poorer intensity discrimination, especially for high-frequency sounds and certain vowels, compared to typically developing peers. This highlights challenges in auditory perception with hearing loss devices.

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Published on: January 23, 2017

Area of Science:

Auditory perception
Hearing science
Speech processing

Background:

Intensity discrimination is crucial for environmental sound perception, emotional cues, and sound localization.
Cochlear implants (CIs) can alter sound intensity perception, impacting users' auditory experience.
Understanding intensity discrimination in CI users is vital for optimizing auditory rehabilitation.

Purpose of the Study:

To compare intensity discrimination abilities between children with CIs and typically developing children.
To investigate the effect of signal frequency on intensity discrimination in both groups.

Main Methods:

Thirty children (15 CI users, 15 typically developing) participated.
Intensity discrimination was assessed using three warble tones (500 Hz, 1000 Hz, 4000 Hz) and three vowels (/a/, /i/, /u/).
A 3-alternative forced-choice technique was employed.

Main Results:

Children with CIs performed significantly worse than controls for the 4000 Hz tone and the vowels /a/ and /u/.
No significant differences were found for the 500 Hz and 1000 Hz tones, or the /i/ vowel.
Performance varied with signal frequency in both groups.

Conclusions:

Intensity discrimination thresholds are frequency-dependent in children with CIs.
CI users exhibited poorer high-frequency intensity discrimination compared to controls.
Vowel intensity discrimination differed between groups, particularly for low- and mid-frequency vowels.