hearing-acuity
Guest
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Just found out myself.
For class 1 (initial issue): Hearing loss no greater than 20 dB in either ear at 500, 1000 and 2000Hz and of no more than 35dB at 3000Hz.
Normal hearing ranges from 0 to 20dB in all
frequencies.
All JAA guidelines are published on:
www.jaa.nl
a good sight on hearing is: www.earinfo.com
For class 1 (initial issue): Hearing loss no greater than 20 dB in either ear at 500, 1000 and 2000Hz and of no more than 35dB at 3000Hz.
Normal hearing ranges from 0 to 20dB in all
frequencies.
All JAA guidelines are published on:
www.jaa.nl
a good sight on hearing is: www.earinfo.com




