Workers' Compensation and Assistance Amendment Regulations 1991 (WA)
WESTERN 931 AUSTRALIAN GOVERNMENT
| PERTH, TUESDAY, 26 FEBRUARY 1991 | No. 30 | SPECIAL |
PUBLISHED BY AUTHORITY G. l. DUFFIELD, GOVERNMENT PRINTER AT 3.30 PM
WORKERS' COMPENSATION AND ASSISTANCE ACT 1981
WORKERS' COMPENSATION AND
A7899312191-1850
ASSISTANCE AMENDMENT
REGULATIONS 1991
26 February 1991] GOVERNMENT GAZETTE, WA 933 WESTERN AUSTRALIA
WORKERS' COMPENSATION AND ASSISTANCE ACT 1981
WORKERS' COMPENSATION AND
ASSISTANCE AMENDMENT
REGULATIONS 1991
Made by His Excellency the Governor in Executive Council.
Citation
1. These regulations may be cited as the Workers' Compensation and Assistance
Amendment Regulations 1991.
Commencement
These regulations shall come into operation on the day on which the Workers' Compensation and Assistance Amendment Act 1988 is proclaimed to come into operation.
2.
Principal regulations
3. In these regulations, the Workers' Compensation and Assistance Regulations
1982* are referred to as the principal regulations. [*Published in the Gazette of 8 April 1982 at pp. 1229-1250. For amendments to
4 February 1991 see p. 403 of 1989 Index to Legislation of Western Australia.]
Part 1 heading inserted
4. The principal regulations are amended by inserting before regulation 1 the
following Part heading-
" PART I-PRELIMINARY "
Part 2 heading inserted
5. The principal regulations are amended by inserting before regulation 4 the
following Part heading-
" PART 2-GENERAL "
934 GOVERNMENT GAZETTE, WA [26 February 1991 2
Regulation 4 amended
6. Regulation 4 of the principal regulations is amended by deleting "24" and
substituting the following-
" 24B "
Part 3, and Part 4 heading, inserted
7. The principal regulations are amended by inserting after regulation 19 the
following Part and Part headings-
" PART 3-NOISE INDUCED HEARING LOSS Interpretation
19A.In this part unless the contrary intention appears-
"approved" means approved in writing by the Executive Director;
"approved medical practitioner" means a medical practitioner approved
under regulation 19B (1) (a);
"approved person" means a person approved under regulation 19B;
"audiologist" means an audiologist approved under regulation 19B (1)
(b);
"audiometric officer" means a person approved under regulation 19B (1)
(c);
"Australian Standard" means a standard published by the Standards Association of Australia, as amended from time to time;
"clause" means a clause in Schedule 7 to the Act.
Persons approved to carry out audiometric testing
19B. (1) The Executive Director may approve, either generally or in a particular case, the following persons to carry out audiometric testing-
(a) a medical practitioner;
(b) an audiologist who is either a full member or qualified to be a full member of the Audiological Society of Australia; and
(c) a person who, in the opinion of the Executive Director, has appropriate qualifications to enable that person to carry out audiometric testing as an audiometric officer.
(2) An audiometric test for the purposes of sections 24A and 24B of the Act shall be carried out by a person approved under subregulation (1).
(3) The Executive Director may at any time cancel an approval given under subregulation (1).
(4) The Executive Director shall serve on each person to whom an approval, or cancellation of approval, relates a certificate of approval or notification of cancellation, as the case requires.
26 February 1991] GOVERNMENT GAZETTE, WA 935 3
Testing procedures
19C. (1) An approved person shall carry out an audiometric test- (a)
using an audiometer which meets the standards specified in writing by the Executive Director; and
(b)
in an approved hearing booth or other approved testing environment.
(2) An approved person using an audiometer under subregulation (1)
shall-
(a) check the audiometer on each day of use, both before and after the series of measurements carried out and after any relocation of the audiometer, to ensure that the audiometer is in satisfactory working order; and (b) ensure that the audiometer has been calibrated at an approved calibration laboratory within the 12 months preceding each day of use and that the audiometric officer has received a copy of the report prepared on that calibration.
(3) An approved person shall ensure that the background noise levels during the testing of the hearing of a worker do not exceed those values listed in Table 5.1 in Section 5 of Australian Standard 1269-1989, or an approved equivalent, for the type of earphone/cushion or earphone enclosure combination connected to the audiometer used for the testing.
(4) Subject to subsection (5), an approved person shall test the hearing of a worker by means of a pure tone air conduction hearing threshold test carried out separately for the left and right ears-
(a) in accordance with-
(i) the procedure described in Section E2 of Appendix E of Australian Standard 1269-1989 as modified by written direction of the Executive Director; or
(ii) any procedure which establishes a higher testing procedure than
that specified in subparagraph (i) and which is approved in writing by the Executive Director;
and
(b) if the test is conducted in accordance with the procedure referred to in subregulation (4) (a) (i), at the frequencies 500, 1 000, 1 500, 2 000, 3 000, 4 000, 6 000, 8 000 Hz except that where an audiometer does not possess a 1 500 Hz tone the hearing threshold for that frequency shall be calculated by drawing a straight line on
an audiogram connecting the points of threshold for 1 000 and 2 000
Hz, marking the point of intersection with the 1,500 Hz line, and adjusting this value to the nearest 5dB increment.
(5) If, in the opinion of the Executive Director, a worker has a disability
which will prevent the effective use of an audiometric test referred to in
936 GOVERNMENT GAZETTE, WA [26 February 1991 4
subregulation (4), the hearing of that worker may be tested by any other
method approved for the purposes of this subregulation.(6) In instances where audiometric testing is carried out by an audiometric officer and the audiometric officer believes that the worker meets the criteria specified in Item 4 of Waugh & Macraes' criteria for medical referral in Table 1 of National Acoustic Laboratories Report No. 80 "Criteria for assessing hearing conservation audiograms", the audiometric officer shall refer the worker to a medical practitioner and the audiometric officer shall defer audiometric testing until the worker has complied with the referral and the audiometric officer is satisfied that the worker does not meet those criteria.
(7) When an initial audiometric test is carried out by an audiometric officer and the results of an air conduction test meet the criteria specified in Item 1, 2 or 3 of Waugh and Macraes' criteria for medical referral in Table 1 of National Acoustic Laboratories Report No. 80, the audiometric officer shall refer the worker to an audiologist or an approved medical practitioner for full audiometric testing and the audiologist or approved medical practitioner shall, if the results of the full audiometric test meet those criteria, refer the worker to a medical practitioner registered in the speciality of otorhinolaryngology for a full otorhinolaryngological assessment to determine the percentage of noise induced hearing loss.
(8) Where the results of an air conduction test carried out after an initial audiometric test show-
(a) at least a 10% loss of hearing from the initial audiometric test; (b) at least a 5% loss of hearing from the loss shown by the audiometric test which resulted in a successful election by the worker under
section 24A; or(c) where the worker has reached the age of 65 years or on the worker's retirement from work before that age, any further percentage loss of hearing from the loss shown by the audiometric test which resulted in a successful election by the worker under section 24A,
the worker shall be referred by the Commission to an audiologist or an approved medical practitioner for full audiometric testing, and the
audiologist or medical practitioner shall, upon completion of that testing refer the worker to a medical practitioner registered in the specialty of otorhinolaryngology for full otorhinolaryngological assessment to determine
the percentage of noise induced hearing loss.(9) Where the results of a further air conduction test, carried out after out after those tests referred to in subregulation (8), show a further loss of hearing, the worker shall be referred by the Commission to an audiologist or an approved medical practitioner for full audiometric testing and the audiologist or medical practitioner shall, if a further hearing loss is confirmed, refer the worker to a medical practitioner registered in the speciality of otorhinolaryngology for a full otorhinolaryngological assessment to determine the percentage of noise induced hearing loss. (10) Where a worker is referred to an approved medical practitioner,
audiologist or medical practitioner registered in the speciality of
26 February 1991] GOVERNMENT GAZETTE, WA 937 5
otorhinolaryngology under subregulation (6), (7), (8) or (9), the audiometric
test of that worker is completed on the date that-
(a) if the referral is under subregulation (6), the audiometric officer completes the audiometric test; and
(b) if the referral is under subregulation (7), (8) or (9), the medical practitioner or audiologist completes the audiometric test, or if the worker is further referred, the medical practitioner registered in the speciality of otorhinolaryngology determines the percentage of noise induced hearing loss.
Notice of audiometric test and testing arrangements
19D. (1) The employer of a worker who is required, or who makes a request, to undergo an audiometric test under clause (2) shall give written notice of the test to the worker in the form of Form 18 in Appendix I.
(2) The employer of a worker given a notice under subregulation (1) shall ensure that the worker is not knowingly exposed in the workplace, and the worker shall not knowingly permit himself to be exposed, to noise levels above 80dB(A) during the 16 hours preceding an audiometric test.
(3) A worker given a notice under subregulation (1) shall not, without reasonable excuse, proof of which is on the worker, fail to submit himself for testing so notified.
Calculation of loss of hearing
19E. (1) In section 24A (2) of the Act, loss of hearing means loss of hearing calculated in accordance with the hearing loss tables RB and EB published in Appendices 3 and 7 of Report No. 118 of the National Acoustic Laboratories as annexed in Appendix III.
(2) The method of determining percentage loss of hearing occurring during
the interval between 2 audiometric tests shall be by subtraction.
Report on audiometric test and storage of results
19F. (1) A person who carries out an audiometric test shall ensure that
the results are prepared and delivered to the Commission and the worker in
the form of Form 19 in Appendix I.(2) The Commission shall, on the written request of the worker tested, communicate the results of an audiometric test delivered to it under clause 4 (2) to any person specified by the worker in that request.
(3) A person who receives the results of an audiometric test under
subregulation (2) shall ensure that the results of the test, and any
938 GOVERNMENT GAZETTE, WA [26 February 1991 6
information derived from those results are not communicated to any person
other than the worker except at the written request of the worker tested.
(4) The Commission shall store the results of audiometric tests delivered to
it under clause 4 (2) for a period ending the day after the 70th birthday of
the worker to whom the results relate.
Reference to medical panel
19G. A worker or employer requesting a reference to a medical penel under clause 6 (1) (b) shall-
(a) request the reference in the form of Form 20 in Appendix I; and
(b) pay to the Executive Director a fee of $50.
Retest of person's hearing
198. (1) A worker or employer who disputes the results of an audiometric
test shall give notice in the form of Form 21 in Appendix I to the
Commission.
(2) A retest of a worker's hearing under clause 7 (1) shall be carried out in
the manner prescribed under regulation 19C by-
(a) an approved medical practitioner;
(b) an audiologist; or
(c)
a medical practitioner registered in the speciality of otorhinolaryngology,
nominated in writing by the Executive Director.
(3) A retest of a worker's hearing under clause 7 (1) may include-
(a) a physical examination; and
(b) any other appropriate investigation the approved medical practitioner or audiologist considers necessary to determine- (i) whether the worker's hearing loss is noise induced;
(ii) whether the worker's hearing loss is due, or partly due, to
ear disease;
(iii) whether the worker's hearing loss is due, or partly due, to a hearing loss which is noise induced but of a type which is not due to the nature of any employment in which the worker was or is engaged; and
(iv) any other causes of the hearing loss.
26 February 1991J GOVERNMENT GAZETTE, WA 939 7
(4) Having regard to the results obtained under subregulation (3), the medical practitioner registered in the speciality of otorhinolaryngology may determine the noise induced hearing loss of the worker as a binaural noise induced hearing loss expressed as a percentage loss of hearing.
Prescribed workplaces
191. (1) For the purposes of clause 10 a prescribed workplace is a workplace or part of a workplace where a worker is receiving, or is likely to receive, noise above the action level specified in subregulation (2).
(2) For the purposes of this regulation-
"action level" means-
(a) an L peak of 140dB(lin)j or
(b) a representative LAeq,8h of 90dB(A)j"L peak" means the maximum unweighted sound pressure level recorded with an instrument equipped for measuring peak valves III accordance with AS 1259.1-1990j
"representative LAeq,8h" means an 8 hour equivalent continuous A weighted sound pressure level, determined from the assessment of worker exposures that is typical of the operation, work pattern or process being assessed as described in AS 1269-1989 Clause 1.4.7.
PART 4-MISCELLANEOUS "
Appendix I amended
8. Appendix I to the principal regulations is amended-
(a) in Form 1 by deleting "(Section 24)" and substituting the following-
" (Section 24B) "j and
(b) by inserting the following forms-
940 GOVERNMENT GAZETTE, WA [26 February 1991 8
" Form 18 (Reg. 19D) WORKERS' COMPENSATION AND ASSISTANCE ACT 1981
NOTICE OF ARRANGEMENT OF AUDIOMETRIC TEST
TO:
(Full Name of Worker)
of:
(Full Address of Worker)
Notice is hereby given that I have arranged for you to undergo an audiometric test to be conducted by
(name of person approved under regulation 19B)
of ....................................................... .
(Full address at which test is to conducted)
at ................... a.m./p.m. on .......................... .
(Signature of person arranging test)
(N arne of Employer) (date)
NON-ATTENDANCE: A worker shall not, without reasonable excuse, fail to submit himself for an audiometric test of which the worker has notice (regulation 19D (3».
PERIOD OF QUIET: An employer shall ensure that the worker is not knowingly exposed in the workplace, and the worker shall not knowingly permit himself to be exposed, to noise levels above 80dB(A) during the 16 hours
immediately preceding the audiometric test
(regulation 19D (3».
PENALTY: $200.
26 February 1991] GOVERNMENT GAZETTE, WA 941 9
FORM 19A
(Reg. 19F)
WORKERS' COMPENSATION AND ASSISTANCE ACT 1981
REPORT OF BASELINE AUDIOMETRIC TEST
TO: EXECUTIVE DIRECTOR, WORKERS' COMPENSATION AND REHABILITATION COMMISSION
Notice is hereby given that I have conducted an audiometric *testlretest of: EMPLOYEE DETAILS
111111111 I I I GIVEN NAMES (in full) SEX D D SURNAME
M F ADDRESS NUMBER AND STREET I, I I I I I I I I I I I II II I I SUBURB OR TOWN POST CODE DATE OF BIRTH
I I I I I I I ~I~I~I~I~I ~I ~I _I~I~I~~~I ~I~~~I~I~I~I-LI-LI-LI-L-L~
DAY MONTH YEAR HOME PHONE NUMBER WORK PHONE NUMBER EMPLOYED OR FORMERLY EMPLOYED BY:
I, I II I I I I II FULL NAME OF EMPLOYER
I, I I I I I I I I I I I I I I I I I ADDRESS NUMBER AND STREET OF EMPLOYER
11111111 I I I I I I SUBURB OR TOWN POST CODE I I I
PREDOMINANT INDUSTRY OF EMPWYER A. S. I. C.· OFFICE USE LEVEL OF TEST: PURPOSE OF TEST:
0-1 ---'1
Air-conduction Baseline Full audiological Medical Panel
942 GOVERNMENT GAZETTE, WA [26 February 1991 10
PLEASE TICK ONE OF THE FOLLOWING IF APPLICABLE: WAUGH AND McCRAE CRITERIA: Commencement with employer Item 1 Severance from employer Item 2 Retirement Item 3 Turning 65
OTORHINOLARYNGOLOGICAL EXAMINATIO~
Voluntary Please tick L-
Re·entry to workforce after retirement Practitioner: .......................................... , ........................ . Addre.s: ........................................................................ .
Signature: ......................................... DATE: ................. .
HEARING TEST RESULTS
!
HERTZ (Hz) I 500 1000 ! 1500 2000 3000 4000 i 6000 I 8000
I i I i ,
I i
I I i
RTEAR I i I I
AIR I i
CONDUCTION LTEAR i ! I
I i ! I
I i I I I I.
, , ,
i ; : ;
, . I ' .
I i i
RTEAR I I I I .. , ,
BONE ' , ..1'
I :
CONDUCTION I !
... LTEAR I I I i I :
I i
I i
CALCULATED PLH '---'-_-'-__ --11 % •• CALCULATED NOISE INDUCED PLH
PERSON CONDUCTING TEST
II I II I I i ! I I '
SURNAME INITIALS REG. NO.
EQUIPMENT REG. NO. BOOTH REG. NO. I hereby certify, that I have personally conducted an audiometric test in accordance with the Workers' Compen.ation and
Assiatance Act and Regulation. and to the best of my knowledge and belief the result. are true and correct.
DATE OF TEST
SIGNATURE
• Delete which doesn't apply ••
Otorhinolaryngologist only DAY MONTH YEAR ••• Approved Medical Practitioners or
Audiologists Only
26 February 1991] GOVERNMENT GAZE'ITE, WA 943 11
FORM19B
(Reg. 19F)
WORKERS' COMPENSATION AND ASSISTANCE ACT 1981
REPORT OF SUBSEQUENT OR RETIREDfl'URNING 65
AUDIOMETRIC TEST
TO: EXECUTIVE DIRECTOR, WORKERS' COMPENSATION AND REHABll.lTATION COMMISSION
Notice is hereby given that I have conducted an audiometric *test/retest of: EMPLOYEE DETAILS
11111111111 JIll II GIVEN NAMES (in full) SEX
SURNAME D D F 11111111111111 FORMER SURNAME IF APPLICABLE 1111111111111 ADDRESS NUMBER AND STREET
111111 SUBURB OR TOWN POST CODE DATE OF BIRTH
I I I I I I I ~I~I ~I~I~I~I~I~I~I~I~~~I ~I~_I~I~I~I~I~I~I~I~~~ DAY MONTH YEAR HOME PHONE NUMBER WORK PHONE NUMBER EMPLOYED OR FORMERLY EMPLOYED BY:
11111111111
FULL NAME OF EMPLOYER
1111111111111111111 I I I I ADDRESS NUMBER AND STREET OF EMPLOYER I I I I I I I I 1=:J SUBURB OR TOWN POST CoDE
I I I I I
PREDOMINANT INDUSTRY OF EMPLOYER A. S. L C .• OFFICE USE LEVEL OF TEST: PURPOSE OF TEST: Air-conduction Full audiological Subsequent Medical Panel Ret!redfl'uming 65
944 GOVERNMENT GAZETTE, WA [26 February 1991 12
PLEASE TICK ONE OF THE FOLLOWING IF APPLICABLE:
Commencement with employer
Severance from employer
Retirement
Turning 65
OTORHINOLARYNGOLOGICAL EXAMINATION
Voluntary Please tick C Re-entry to workforce after retirement Practitioner: ................................................................... .
Addreas: ........................................................................ .Signature: ......................................... DATE: ................. . HEARING TEST RESULTS
HERTZ (Hz) 500 1000 1500 2000 ! 3000 4000 6000 8000
I I RTEAR
AIR I I
CONDUCTION LTEAR
I ,
I i III I Ii ! ill
I ! I
RTEAR
i i I ! ! II
BONE
CONDUCTION LTEAR I I! 1 li ...
I I "
II ! II
! I II .: ! ['
CALCULATED PLH 1..--'-_--'-_-'---11 % •• CALCULATED NOISE INDUCED PLH
PERSON CONDUCTING TEST
I I ! ! ! ' SURNAME
INITIALS REG. NO.
EQUIPMENT REG. NO. BOOTH REG. NO. I hereby certify, that I have personally conducted an audiometric test in accordance with the Workers' Compensation and
Aasiatonce Act and Regulations and to the best of my knowledge and belief the results are true and correct.
DATE OF TEST
SIGNATURE
! !
• Delete which doeon't apply ••
Otorhinolaryngologist only DAY MONTH YEAR ••• Approved Medical Practitioners or
Audiologists Only
26 February 1991] GOVERNMENT GAZETTE, WA 945 13
Form 20 (Reg. 190)
WORKERS' COMPENSATION AND ASSISTANCE ACT 1981
APPLICATION FOR REFERENCE TO MEDICAL PANEL
TO: EXECUTIVE DIRECTOR
WORKERS' COMPENSATION AND
REHABILITATION COMMISSIONNAME OF WORKER:
ADDRESS OF WORKER:
NAME OF EMPLOYER:
ADDRESS OF EMPLOYER:I, being an "'employer/worker hereby request that a medical panel be appointed under Clause 6 of Schedule 7 to enquire into and report on the following matters-
**
Signature of Applicant Date
* Strike out whichever does not apply. ** Here insert any question that arises concerning the audiometric testing
or hearing loss of the worker. Note: The prescribed fee is $50.00 and must accompany this form.
946 GOVERNMENT GAZETTE, WA [26 February 1991 14
Form 21
(Reg. 19H)
WORKERS' COMPENSATION AND ASSISTANCE ACT 1981
NOTICE OF DISPUTE
TO: EXECUTIVE DIRECTOR
WORKERS' COMPENSATION AND
REHABILITATION COMMISSIONNAME OF WORKER:
ADDRESS OF WORKER:
NAME OF EMPLOYER:
ADDRESS OF EMPLOYER:
I, being an *employer/worker hereby notify you that I dispute the results of
an audiometric test conducted on the above worker on
(date) ......... ./ ......... ./19 ..... and request that you arrange a retest of hearing
under regulation 19H.
Signature of Applicant Date
Strike out whichever does not apply.
'" "
26 February 1991] GOVERNMENT GAZETrE, WA 947 15
Appendix III added
9. After Appendix II to the principal regulations the following appendix IS
added-
" APPENDIX III (Reg. 19E) REPORT NO. 118 OF THE NATIONAL ACOUSTIC LABORATORIES
APPENDIX 3
BINAURAL TABLES FOR DETERMINING PECENTAGE LOSS OF HEARING
January. 1988
It is recommended that the following procedure be used to assess
binaural percentage loss of hearing.
1. Measure the hearing threshold levels (HTLs) of the person at the
audiometric frequencies 500, 1000, 1500, 2000, 3000 and 4000 Hz.
2. Determine the better and worse ears at each of these frequencies. At
a particular frequency. the better ear is the ear with the smaller HTL.
The better ear at one frequency may be the worse at another.
3. Using the HTLs of the better and worse ears. read the percentage loss
of hearing (PLH) at each frequency from the appropriate table (Table
RB-500, RB-1000, RB-1500, RB-2000, RB-3000 or RB-4000) and add these six
values together to obtain the overall binaural PLH.
Example
HEARING THRESHOLD LEVELS
FREQUENCY RIGHT LEFT BETTER WORSE PLH EAR EAR EAR EAR 500 40 10 10 40 1.7
1000 45 25 25 45 4.2 1500 50 40 40 50 7.1 2000 55 55 55 55 8.4 3000 60 70 60 70 6.5 4000 65 85 65 85 7.1 OVERALL BINAURAL PLH = 35.0%
to
t!:>-OO
TABLE RB - 500
VALUES OF PERCENTAGE LOSS OF HEARING CORRESPONDING TO GIVEN
HEARING THRESHOLD LEVELS IN THE BETTER AND WORSE EARS AT 500 HZ 0
HTL - BETTER EAR 0 ~
f 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ~ 95
f 15 0
~
20 0.4 0.6 t%J
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 ~ t%J
40 1.7 2.2 3.0 3.9 5.1 6.4 ....
(7)
45 2.0 2.6 3.4 4.3 5.5 6.8 8.1 ~
ll:: v ..(
r.l 50 2.3 2.9 3.7 4,7 5.8 7.1 8.4 9.7
r.l ~
CI) 55 2.5 3.2 4.0 5.0 6.1 7.3 8.6 9.9 11.2
ll:: 0
:;:: 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
..:I ,......, E-t I.\:)
::r: 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 0) "'%j 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 (1)
C'" >; 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 s= Il' 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 to
to
~ 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 ....
TABLE RB - 1000 t>.:) O'l
VALUES OF PERCENTAGE LOSS OF HEARING CORRESPONDING TO GIVEN
(0 "%j
HEARING THRESHOLD LEVELS IN THE BETTER AND WORSE EARS AT 1000 HZ 0-"1 ~
HTL - BETTER EAR $I)
~15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 f 95 ~ to-'
~15 0 ~ ~ to-' I-.J 20 0.5 0.8
25 0.8 1.2 1.830 1.2 1.7. 2.5 3.5
0
35 1.7 2.3 3.1 4.3 5.7 0
40 2.1 2.8 3.7 4.9 6.3 8.0 t;3 ,.....
..J
0: 45 2.5 3.3 4.2 5.4 6.9 8.5 10.2
0«
~ 50 2.8 3.6 4.7 5.97.3 8.8 10.5 12.1 ~ ~ t:rj rJJ 55 3.1 3.9 5.0 6.2 7.6 9.1 10.7 12.4 14.0 0: Z 0 1-3 ~ 60 3.3 4.2 5.3 6.5 7.9 9.4 11.0 12.6 14.2 15.7 ...:l 65 3.5 4.4 5.5 6.7 8.1 9.6 11.2 12.8 14.4 15.9 17.5 ~ E-< N :x: 70 3.7 4.6 5.7 6.9 8.3 9.8 11.3 12.9 14.6 16.2 17.8 19.4 t:rj 75 3.8 4.7 5.8 7.1 8.5 10.0 11.5 13.1 14.8 16.4 18.1 19.7 21.1 ~ t:rj 80 3.9 4.9 6.0 7.3 8.6 10.1 11.7 13.3 15.0 16.7 18.4 20.0 21.5 22.7 85 4.1 5.0 6.2 7.4 8.8 10.3 11.8 13 .4 15.1 16.9 18.6 20.3 21.7 23.0 23.9 ~
90 4.2 5.2 6.3 7.5 8.9 10.3 11.9 13.5 15.2 17.0 18.1 20.4 21.9- 23.2 24.1 24.6
~ 95 4.3 5.3 6.4 7.6 8.9 10.3 11.9 13.5 15.2 17.0 18.7 20.5 22.0 23.3 24.2 24.7 25.0
~ ,p... ~ <:0 Ol o
TABLE RB - 1500
VALUES OF PERCENTAGE LOSS OF HEARING CORRESPONDING TO GIVEN
HEARING THRESHOLD LEVELS IN THE BETTER AND WORSE EARS AT 1500 HZ 0
HTL - BETTER EAR 0
-< t?=.l
f15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ~ 95
~
~15 0
~
20 0.4 0.6 t?=.l Z 25 0.6 1.0 1.4 t-3 30 1.0 1.4 2.0 2.8
35 1.3 1.8 2.5 3.4 4.5 ~ t?=.l 40 1.7 2.2 3.0 3.9 5.1 6.4 ,....
00 ~
Il:: 45 2.0 2.6 3.4 4.3 5.5 6.8 8.1 t?=.l .0: CLI 50 2.3 2.9 3.7 4.7 CLI 5.8 7.1 8.4 9.7
til 55 2.5 3.2 4.0 5.0 ~ Il::
0 6.1 7.3 8.6 9.9 11.2 :3: 60 2.7 3.4 4.2 5.2 6.3 7.5 8.8 10.0 11.3 12.6 ...:l 65 2.8 3.5 4.4 5.4 6.5 7.7 8.9 10.2 11.5 12.7 14 .0
Eo< ......, t>:l
= 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 0') ~
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 CD
0" '-I 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 <:0
<:0
~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 .....
TABLE RB - 2000 I:..:> 0)
VALUES OF PERCENTAGE LOSS OF HEARING CORRESPONDING TO GIVEN I'%j ('1)
HEARING THRESHOLD LEVELS IN THE BETTER AND WORSE EARS AT 2000 HZ 0- '"I ~
HTL - BETTER EAR p; ~
~15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ~95 I-'
~ 15 0 CD CD
L..-.J I-' 20 0.3 0.5
25 0.5 0.7 1.1
30 0.7 1.0. 1.5 2.1
0
35 1.0 1.4 1.9 2.5 3.4 0 <
40 1.3 1.7 2.2 2.9 3.8 4.8 ..... t:z:j to
0:: 45 1.5 1.9 2.5 3.3 4.1 5.1 6.1 ..: ~ 50 1.7 2.2 2.8 3.5
4.4 5.3 6.3 7.3 ~ ~ t:z:j
(J) 55 1.9 2.4 3.0 3.7 0:: 4.6 5.5 6.4 7.4 8.4 Z 0 ~ 3: 60 2.0 2.5 3.1 3.9 4.7 5.6 6.6 7.5 8.5 9.4 ..:I 65 2.1 2.6 3.3 4.0 4.9 5.7 6.7 7.6 8.6 9.6 10.5 ~ E-< N :x: 70 2.2 2.7 3.4 4.1 5.0 5.9 6.8 7.8 8.7 9.7 10.7 11.6 t:z:j
75 2.3 2.8 3.5 4.3 5.1 6.0 6.9 7.9 8.9 9.9 10.8 11.8 12.7 ~
~ t:z:j 80 2.4 2.9 3.6 4.4 5.2 6.1 7.0 8.0 9.0 10.0 11.0 12.0 12.9 13.6 85 2.4 3.0 3.7 4.4 5.3 6.1 7.1 8.1 9.1 10.1 11.1 12.1 13 .0 13 .8 14.3 ~
90 2.5 3.1 3.8 4.5 5.3 6.2 7.1 8.1 9.1 10.2 11.2 12.2 13.2 13 .9 14 .4 14 .8 ~ 95 2.6 3.2 3.8 4.6 5.4 6.2 7.1 8.1 9.1 10.2 11.3 12.3 13.2 14.0 14.5 14.8 15.0 CD
Ol
I-'
01 '" l\:)
TABLE RB - 3000
VALUES OF PERCENTAGE LOSS OF HEARING CORRESPONDING TO GIVEN
HEARING THRESHOLD LEVELS IN THE BETTER AND WORSE EARS· AT 3000 HZ Q
HTL - BETTER EAR 0
< t:rj
~ 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ~ 95
~ 15 0
~
20 0.2 0.3 t:rj Z 25 0.3 0.5 0.7 1-3 30 0.5 0.7 1.0 1.4
35 0.7 0.9 1.2 1.7 2.3 ~ t:rj 40 0.8 1.1 1.5 2.0 2.5 3.2
t>:l ~ 0 t:rj
45 1.0 1.3 1.7 2.2 2.7 3.4 4.1 ~ I:t:
< 50 1.1 1.4 1.9 2.3 r..:I 2.9 3.5 4.2 4.8
r..:I ~ Ul 55 1.2 1.6 2.0 2.5 3.0 3.6 4.3 4.9 5.6 I:t: 0 60 1.3 1.7 2.1 2.6 3: 3.1 3.7 4.4 5.0 5.6 6.3 65 1.4 1.8 2.2 2.7 3.2 3.8 4.4 5.1 5.7 6.4 7.0 ... ,...., E-t 70 1.5 1.8 2.3 2.8 l\:)
::c 3.3 3.9 4.5 5.2 5.8 6.5 7.1 7.7 m I'%j 75 1.5 1.9 2.3 2.8 3.4 4.0 4.6 5.2 5.9 6.6 7.2 7.8 8.4 (I) 0- 80 1.6 2.0 2.4 2.9 3.4 4.0 4.7 5.3 6.0 6.6 7.3 8.0 8.6 9.1
s:: '"' 85 1.6 2.0 2.5 3.0 3.5 4.1 4.7 5.4 6.0 6.7 7.4 8.1 8.7 9.2 9.5 ~ '< 90 1.7 2.1 2.5 3.0 3.5 4.1 4.7 5.4 6.1 6.8 7.5 8.2 8.8 9.2 9.6 9.8 I-' f95 1.7 2.1 2.6 . 3.0 3.6 4.1 4.7 5.4 6.1 6.8 7.5 8.2 8.8 9.3 9.6 9.8 10.0 '"
'" I-' 0) ~
TABLE EB - 4000
CD ~
VALUES OF PERCENTAGE LOSS OF HEARING CORRESPONDING TO GIVEN HEARING 0"' >-t ~
THRESHOLD LEVELS IN THE BETTER AND WORSE EARS AT 4000 HZ. II' ~
HTL - BETTER EAR I-' c:o
~20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 ~ 95 c:o
........ I-'
~20 0
25 0.1 0.2 30 0.2
0.·3 0.5
Q
35 0.3 0.4 0.6 0.9 0
40 0.4 0.5 0.8 1.0 1.5 ;3 I>:)
....
il: 45 • 0.5 0.7 0.9 1.2 1.6 2.1 < ril 50 0.6 0.8 1.0 1.4 1.7
2.2 2.6 ~
ril t:tj til
il: 55 0.6 0.8 1.1 1.5 1.8 2.2 2.7 3.1
3 0 ~
60 0.7 0.9 1.2 1.5 1.9 2.3 2.7 3.2 3.6 65 0.7 1.0 1.3 1.6 2.0 2.4 2.8 3.2
3.6 4.0
...:t
Eo< ~ :t: t:tj
70 0.8 1.0 1.3 1.6 2.0 2.4 2.8 3.2 3.7 4.1 4.5 75 0.8 1.1 1.4 1.7 2.1 2.5 2.9 3.3 3.7 4.1
4.5 4.9 ~ 80 0.9 1.1 1.4 1.7 2.1 2.5 2.9 3.3 3.8 4.2
4.6 5.0 5.3
"
85 0.9 1.2 1.4 1.8 2.1 2.5 2.9 3.4 3.8 4.3 4.7 5.1 5.4 5.7 ~
90 0.9 1.2 1.5 1.8 2.2 2.6 3.0 3.4 3.8 4.3 4.7 5.1 5.5 5.7 5.9 ~ 95 1.0 1.2 1.5 1.8 2.2 2.6 3.0 3.4 3.9 4.3 4.8 5.2 5.5 5.7 5.9 6.0 c:o
01 ~
~ 01 *"" TABLE EB - 6000
VALUES
OF PERCENTAGE 'LOSS OF HEARING CORRESPONDING TO GIVEN HEARING
Q 0
THRESHOLD LEVELS IN THE BETTER AND WORSE EARS AT 6000 HZ.
HTL - BETTER EAR ;3
~ 25 30 35 40 45 50 55 60 65 70 75 80 85 90 f95
~ t;j
f25 0
Z
30 0.1 0.2 ~ 35 0.2 0.3 0.4 40 0.3 0.4 0.5 0.7
~ t;j
p:: 45 0.3 0.4 0.6 0.8 1.0 f>:) ~ ..:: f>:) t;j i:>l 50 0.4 0.5 0.7 0.9 1.1 1.3 v i:>l
en 55 0.4 0.5 0.7 0.9 1.1 1.3 1.5 p::
0 ~
3: 60 0.4 0.6 0.7 0.9 1.1 1.4 1.6 1.8
..:I 65 0.5 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 E-t :.:
70 0.5 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 ,.....,
t-.:>
75 0.5 0.7 0.8 1.0 1.2 1.4 1.-7 1.9 2.1 2.3 2.5 0':) I'%j 80 0.6 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 (t) 0'" 85 0.6 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.8 '"i
~ p:J 90 0.6 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.2 2.4 2.6 2.7 2.8 2.9 '< '"i .....
f 95 0.6 0.8 0.9 1.1 1.3 1.5 1.7 1.9 2.2 2.4 2.6 2.7 2.8 2.9
3.0
~ ~
.....
26 February 1991] GOVERNMENT GAZETTE, WA 955 23
APPENDIX 7
BINAURAL EXTENSION TABLES
January 1988
These tables replace Table RB-4000 in the binaural tables given in
Appendix 3 when it is necessary to determine binaural PLH over the range
500 to 8000 Hz. The weighting of 10% given to 4000 Hz in Appendix 3 has
been split between 4000, 6000 and 8000 Hz, with 4000 Hz receiving 6%,
6000 Hz 3% and 8000 Hz 1%. When determining binaural PLH over the range
500 to 8000 Hz, the appropriate tables from Appendix 3 are used for the
frequencies 500, 1000, 1500, 2000 and 3000 Hz and the relevant tablesgiven in this Appendix are used for the frequencies 4000, 6000 and 8000
Hz.
Example
HEARING THRESHOLD LEVELS
FREQUENCY RIGHT LEFT BETTER WORSE PLH EAR EAR EAR EAR 500 40 10 10 40 1.7 1000 45 25 25 45 4.2 1500 50 40 40 50 7.1 2000 55 55 55 55 8.4 3000 60 70 60 70 6.5 4000 65 85 65 85 4.3 6000 55 75 55 75 1.7
8000 45 65 45 65 0.4 OVERALL BINAURAL PLH = 34.3%
~
01
0')
tl:l t:1
'<
P:I
::t: S-
_. ~
C1l
.....
I
trJ CJ:)
I ~ '%j (') (I) gJ
iii' a e.Cj' TABLE EB - 8000
::s P:I VALUES OF PERCENTAGE LOSS OF HEARING CORRESPONDING TO GIVEN HEARING
4.~ ~ C1l THRESHOLD LEVELS IN THE BETTER AND WORSE EARS AT 8000 HZ. o~
o CJ:) HTL - BETTER EAR i3 .....
i3 ~
P:I f 30 35 40 45 50 55 60 65 70 75 80 85 ~ 90 l:t.:J
~ ~ 30 o ~
35 0.1 0.1 40 0.1
0.2 0.2 ~ t:z:j 45 0.1
0.2 0.3 0.3
~ ~ < ~
f:l 50 0.2 0.2 0.3 0.3 0.4 ~ v f:l rJl 55 0.2 0.2 0.3 0.4 0.4 0.5 ~
o 3 60 0.2 0.2 0.3 0.4 0.4 0.5 0.6 ~
!f
~
65 0.2 0.3 0.3 0.4 0.5 0.5 0.6 0.7
~ ...:l g:
Gl 70 0.2 0.3 0.3 0.4 0.5 0.5 0.6 0.7 0.7 »
:0 t3
~ 75 0.2 0.3 0.3 0.4 0.5 0.5 0.6 0.7 0.8 0.8 0') r I'%j c
o o 80 0.2 0.3 0.3 0.4 0.5 0.6 0.6 0.7 0.8 0.8 0.9 ." iii'
." ~ '"'l t:1
ffi i:J;"'. 85 0.2 0.3 0.4 0 •. 4 0.5 0.6 0.6 0.7 0.8 0.8 0.9 0.9
r- a .0 S,41
Gl ~ 90 0.2 0.3 0.4 0.4 0.5 0.6 0.6 0.7 0.8 0.8 0.9 0.9 1.0 ~
~ s-~
(I) t-< ..... 3 3 (I)
0 ...... ~ o 41 ~ a ..... ." s:: ::t: o!.
::s >-:1 ~~ ~ "
0
0
0