Hearing Loss Degrees

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Hearing loss was originally defined in medical terms before the development of modern audiology. Today professionals use the consistent, research-based terminology of audiology, as well as less-defined educational and cultural descriptions. The following numerical values are based on the average of the hearing loss at three frequencies 500 Hz, 1,000 Hz, and 2000 Hz, in the better ear without amplification. The numerical values for the seven categories vary from author to author: Normal hearing (-10 dB to 15 dB)
Slight loss (16 dB to 25 dB)
Mild loss (26 dB to 30 dB)
Moderate loss (31 dB to 50 dB)
Moderate/Severe (51 dB to 70 dB)
Severe loss (71 dB to 90 dB)
Profound loss (91 dB or more)

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