Document ID: chunk:federal_register_of_legislation:F2023C00151:reg:4000:p3
Version: federal_register_of_legislation:F2023C00151
Segment Type: reg
Provision Reference: reg 4000 (pt 3/8)
Character Range: 277181–279791

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

Next:
Using the air conduction and bone conduction PLHs, the PLH for bilateral conductive deafness is calculated by 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 bilateral 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 measured right and left air conduction HTL values. The formula is not applied and so age adjustment is required.

         Go to Step 4 (on page 120).

Type 12. Right conductive deafness

Method 1 (to be applied if both air and bone conduction HTLs are available):

First:
Air Conduction PLH is to be calculated using right air conduction HTL values and taking the left air conduction HTL values all to be zero; and

Bone Conduction PLH is to be calculated using right bone conduction HTL values and taking the left 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 by 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 right 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 right air conduction HTL values and taking the left 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).

Type 15. Left conductive deafness

Method 1 (to be applied if both air and bone conduction HTLs are available):

First:
Air Conduction PLH is to be calculated using left air conduction HTL values and taking the right air conduction HTL values 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