OAR 436-035-0250
Hearing Loss
(1)
The following information is provided by the attending physician or reviewed and commented on by the attending physician, under OAR 436-035-0007 (General Principles)(5) and (6), to value work-related hearing loss:(a)
A written record, history, examination, diagnosis, opinion, interpretation and a statement noting if further material improvement would reasonably be expected from medical treatment or the passage of time by a medical provider with specialty training or experience in evaluating hearing loss.(b)
The complete audiometric testing.(2)
A worker is eligible for an award for impairment for any loss of normal hearing that results from the compensable injury. Any hearing loss that existed before the compensable injury and that does not result from a compensable pre-existing condition must be offset against hearing loss in the claim if the hearing loss that existed before the compensable injury is adequately documented by a baseline audiogram that was obtained within 180 days of assignment to a high noise environment.(a)
The offset will be done at the monaural percentage of impairment level.(b)
Determine the monaural percentage of impairment for the baseline audiogram under section (4) of this rule.(c)
Subtract the baseline audiogram impairment from the current audiogram impairment to obtain the impairment value.(3)
Hearing loss is based on audiograms which must report on air conduction frequencies at 500, 1,000, 2,000, 3,000, 4,000 and 6,000 Hz.(a)
Audiograms should be based on American National Standards Institute S3.6 (1989) standards.(b)
Test results will be accepted only if they come from a test conducted at least 14 consecutive hours after the worker has been removed from significant exposure to noise.(4)
Impairment of hearing is calculated from the number of decibels by which the worker’s hearing exceeds 150 decibels (hearing impairment threshold). Compensation for monaural hearing loss is calculated as follows:(a)
Add the audiogram findings at 500, 1,000, 2,000, 3,000, 4,000 and 6,000 Hz. Decibel readings in excess of 100 will be entered into the computations as 100 dB.(b)
Hearing loss caused by presbycusis is based on the worker’s age at the time of the audiogram, except that, in an injury claim, an impairment award for hearing loss caused by presbycusis is reduced only if the presbycusis qualifies as a pre-existing condition. To determine the reduction to be applied for hearing loss caused by presbycusis, consult the Presbycusis Correction Values Table below. (These values represent the total decibels of hearing loss in the six standard frequencies which normally results from aging.) Find the figure for presbycusis hearing loss. Take this presbycusis figure and subtract the hearing impairment threshold of 150 decibels. Subtract any positive value from the sum of the audiogram entries. This value represents the total decibels of hearing loss in the six standard frequencies which normally results from aging that exceed the hearing impairment threshold. (If there is no positive value there is no hearing impairment attributable to presbycusis above the hearing impairment threshold.) [Table not included. See ED. NOTE.](c)
Consult the Monaural Hearing Loss Table below, using the figure found in subsection (b) of this section. This table will give you the percent of monaural hearing loss to be compensated. [Table not included. See ED. NOTE.](d)
No value is allowed for db totals of 150 or less. The value for db totals of 550 or more is 100%.(5)
Binaural hearing loss is calculated as follows:(a)
Find the percent of monaural hearing loss for each ear by using the method listed in (4)(a)–(c) above.(b)
Multiply the percent of loss in the better ear by seven.(c)
Add to that result the percent of loss in the other ear.(d)
Divide this sum by eight. This is the percent of binaural hearing loss to be compensated.(e)
This method is expressed by the formula:(6)
Use the method (monaural or binaural) which results in the greater impairment.(7)
Tinnitus and other auditory losses may be determined as losses under OAR 436-035-0390 (Cranial Nerves/Brain).
Source:
Rule 436-035-0250 — Hearing Loss, https://secure.sos.state.or.us/oard/view.action?ruleNumber=436-035-0250.