Document ID: chunk:federal_register_of_legislation:F2023C00151:reg:4000:p4
Version: federal_register_of_legislation:F2023C00151
Segment Type: reg
Provision Reference: reg 4000 (pt 4/8)
Character Range: 279565–284380

all to be zero; and

Bone Conduction PLH is to be calculated using left bone conduction HTL values and taking the right bone conduction HTL values all to be zero.

Next:
Using the air conduction and bone conduction PLHs, the PLH for right conductive deafness is calculated applying the following formula:

(where "A" is air conduction PLH, and "B" is bone conduction PLH)

No adjustment for age is to be applied to the results of applying the formula. That result is the age adjusted PLH for left conductive deafness.

         Go to Step 5 (on page 122).

Method 2 (to be applied if only air conduction HTLs are available and if it is not practicable or appropriate to obtain bone conduction HTL values as a result of any of the reasons described on page 108).

PLH is to be calculated using left air conduction HTL values and taking the right air conduction HTL values all to be zero. The formula is not applied and so age adjustment is required.

         Go to Step 4 (on page 120).

Table 7.1.3
500 Hz
Values of percentage of loss of hearing corresponding to given hearing threshold levels in the better and worse ear at 500 Hz
HTL — Better ear
 HTL - Worse ear                                                                                                                     <=15  20   25   30   35   40   45    50    55    60    65    70    75    80    85    90    >=95
<=15                                                                                                                           0.0
 20                                                                                                                            0.4   0.6
 25                                                                                                                            0.6   1.0   1.4
 30                                                                                                                            1.0   1.4   2.0  2.8
 35                                                                                                                            1.3   1.8   2.5  3.4  4.5
 40                                                                                                                            1.7   2.2   3.0  3.9  5.1  6.4
 45                                                                                                                            2.0   2.6   3.4  4.3  5.5  6.8  8.1
 50                                                                                                                            2.3   2.9   3.7  4.7  5.8  7.1  8.4   9.7
 55                                                                                                                            2.5   3.2   4.0  5.0  6.1  7.3  8.6   9.9  11.2
 60                                                                                                                            2.7   3.4   4.2  5.2  6.3  7.5  8.8  10.0  11.3  12.6
 65                                                                                                                            2.8   3.5   4.4  5.4  6.5  7.7  8.9  10.2  11.5  12.7  14.0
 70                                                                                                                            2.9   3.7   4.5  5.5  6.6  7.8  9.1  10.3  11.6  12.9  14.2  15.5
 75                                                                                                                            3.0   3.8   4.7  5.7  6.8  8.0  9.2  10.5  11.8  13.1  14.5  15.7  16.9
 80                                                                                                                            3.1   3.9   4.8  5.8  6.9  8.1  9.3  10.6  12.0  13.3  14.7  16.0  17.2  18.2
 85                                                                                                                            3.2   4.0   4.9  5.9  7.0  8.2  9.4  10.7  12.1  13.5  14.9  16.2  17.4  18.4  19.1
 90                                                                                                                            3.4   4.1   5.0  6.0  7.1  8.3  9.5  10.8  12.2  13.6  15.0  16.3  17.6  18.5  19.2  19.7
>=95                                                                                                                           3.4   4.2   5.1  6.1  7.1  8.3  9.5  10.8  12.2  13.6  15.0  16.4  17.6  18.6  19.3  19.7  20.0
                                                                                                                               <=15  20    25   30   35   40   45   50    55    60    65    70    75    80    85    90    >=95

Note: the worse ear is the one with the higher value HTL!

APHL may be age adjusted

Table 7.1.4
1000 Hz
Values of percentage of loss of hearing corresponding to given hearing threshold levels in the better