loading...| Preferred Name |
Hearing Impairment |
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| Synonyms |
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| Definitions |
A decreased perception and/or transmission of sound. Hearing loss can be categorized by which part of the auditory system is damaged, as conductive hearing loss, sensorineural hearing loss, and mixed hearing loss. Another axis of classification uses the degree of hearing impairment. The degree of hearing loss is computed by using a three frequency average taken at 500 Hz, 1,000 Hz and 2,000 Hz. The average of these three frequencies is called the Pure Tone Average (PTA). 0-20 dB is considered normal, 21-40 dB mild loss, 41-60 dB moderate loss, 61-70 dB moderately severe loss,71-90 dB severe loss, and greater than 90 dB profound loss. Note that the word deafness is occasionally used to describe partial hearing loss. The World Health Organization uses the word deafness to refer to complete loss of the ability to hear, and hearing impairment to refer to any degree of reduced hearing. |
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| ID |
http://purl.obolibrary.org/obo/HIO_0000002 |
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| comment |
Hearing loss can be categorized by which part of the auditory system is damaged, as conductive hearing loss, sensorineural hearing loss, and mixed hearing loss. Another axis of classification uses the degree of hearing impairment. The degree of hearing loss is computed by using a three frequency average taken at 500 Hz, 1,000 Hz and 2,000 Hz. The average of these three frequencies is called the Pure Tone Average (PTA). 0-20 dB is considered normal, 21-40 dB mild loss, 41-60 dB moderate loss, 61-70 dB moderately severe loss,71-90 dB severe loss, and greater than 90 dB profound loss. Note that the word deafness is occasionally used to describe partial hearing loss. The World Health Organization uses the word deafness to refer to complete loss of the ability to hear, and hearing impairment to refer to any degree of reduced hearing. |
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| description |
A decreased perception and/or transmission of sound. |
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| created_by |
Jade Hotchkiss |
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| creation_date |
2019-05-24T09:51:09.421966Z |
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| curator note |
Suggest update to description in the HPO. The new description also encompasses conductive hearing impairment whereby the problem is not the perception of sound but the transmission of sound from the outer environment to the inner ear. |
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| database cross reference |
HP:0000365 |
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| definition source | ||
| existence in other ontologies |
Suggest update to description |
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| hasExactSynonym |
Hearing Loss Hearing Defect Deafness |
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| label |
Hearing Impairment |
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| prefixIRI |
HIO:0000002 |
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| prefLabel |
Hearing Impairment |
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| source | ||
| subClassOf |