Hearing impairment overview
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Hearing impairment Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Hearing impairment On the Web |
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American Roentgen Ray Society Images of Hearing impairment |
Overview
Hearing impairment may be a partial or complete decrease in the ability to perceive or comprehend sounds.[1] Caused by a good range of biological and environmental factors, loss of hearing can happen to any organism that perceives sound. It is highly prevalent impairment and chances increase as one's age above 60.[2]Classification is based on laterality, severity, cause, anatomy of ear, symmetry, clinical characteristics, age of onset, and associated symptoms. Sound waves vary in amplitude and in frequency. Amplitude is that the sound wave's peak pressure variation. Frequency is that the number of cycles per second of a sinusoidal component of a wave. Loss of the power to detect some frequencies, or to detect low-amplitude sounds, that an organism naturally detects, may be termed as a hearing disorder. Hearing sensitivity is indicated by the quietest sound that a person can detect, termed the hearing threshold. The normal hearing threshold is not the same for all frequencies of sounds. The Long term exposure to environmental noise, Genetics, Disease or illness, Medications[3], and Physical trauma are different biological mechanisms for hearing loss.
References
- ↑ "Speech and Language Terms and Abbreviations". Retrieved 2006-12-02.
- ↑ Nieman CL, Oh ES (2020). "Hearing Loss". Ann Intern Med. 173 (11): ITC81–ITC96. doi:10.7326/AITC202012010. PMID 33253610 Check
|pmid=value (help). - ↑ Lanvers-Kaminsky C, Zehnhoff-Dinnesen AA, Parfitt R, Ciarimboli G (2017). "Drug-induced ototoxicity: Mechanisms, Pharmacogenetics, and protective strategies". Clin Pharmacol Ther. 101 (4): 491–500. doi:10.1002/cpt.603. PMID 28002638.