au·di·o·gram (ô d - -gr m )n. A graphic record of hearing ability for various sound frequencies. |
Audiogram
A chart or graph of the results of a hearing test conducted with audiographic equipment. The chart reflects the softest (lowest volume) sounds that can be heard at various frequencies or pitches.
Mentioned in: Audiometry
audiogram
[ô′dē·əgram′]
Etymology: Gk, audire + gramma, record
a chart showing the faintest level at which an individual is able to detect sounds of various frequencies, usually in octaves from 125 Hz to 8000 Hz. See also audiometry.
audiogram [aw´de-o-gram″]
1. a graphic record of the findings by audiometry.
2. the hearing test done by audiometry; it tests the ability to hear pure tones in each ear. A careful and complete audiogram will test both bone conduction and air conduction. A comparison between these two types of conduction can be useful in localizing which part of the hearing mechanism is responsible for any hearing loss: if the loss is due to a problem with the portion of the middle ear that conducts sound from the ear canal to the inner ear, it is a conductive hearing loss; if it is due to the inner ear or the nerve that conducts sound signals to the brain, it is a sensorineural hearing loss. The results of audiograms are usually displayed in graph form; the amount of hearing is tested at different sound frequencies (measured in hertz). Most audiograms go from around 250 hertz to 4000 hertz. Lack of hearing at below 20 decibels on the graph is within the normal range; lack of hearing at above 20 decibels is considered abnormal.
The American Speech-Language-Hearing Association has published guidelines for audiologic screening, which are available at their web site: http://www.asha.com. In addition, the U.S. Preventive Services Task Force, part of the Agency for Healthcare Research and Quality, has recommendations on screening for hearing impairment and notes that there is good evidence that screening of newborns leads to earlier identification and treatment. The recommendations are available through the agency's web site: http://www.ahcpr.gov.
The American Speech-Language-Hearing Association has published guidelines for audiologic screening, which are available at their web site: http://www.asha.com. In addition, the U.S. Preventive Services Task Force, part of the Agency for Healthcare Research and Quality, has recommendations on screening for hearing impairment and notes that there is good evidence that screening of newborns leads to earlier identification and treatment. The recommendations are available through the agency's web site: http://www.ahcpr.gov.
audiogram (ô´dē
gram),n a graphic summary of the measurement of hearing loss showing the number of decibels lost at each frequency tested.
audiogram
Audiology A test in which hearing is measured over a range of sound frequencies. See Pure tone audiometry.
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