Document ID: chunk:federal_register_of_legislation:F2021L00029:clause:1_1
Version: federal_register_of_legislation:F2021L00029
Segment Type: clause
Provision Reference: sch 1 cl 1
Character Range: 10136–13688

1               Definitions
In this instrument:
                                  acoustic shock means the development of acoustic shock symptoms within 30 days of being exposed to a brief, sudden, unexpected, loud sound.
Note: acoustic shock symptoms is also defined in the Schedule 1 - Dictionary.
                                  acoustic shock symptoms means the acoustic shock symptoms identified in Work Health and Safety (Managing Noise and Preventing Hearing Loss at Work) Code of Practice 2015, including:
(a)          a feeling of fullness in the ear;
(b)          burning sensations or sharp pain around or in the ear;
(c)          dizziness;
(d)          hypervigilance;
(e)          numbness, tingling or soreness down the side of face, neck or shoulder; and
(f)           tinnitus.
        Note: The sounds associated with the development of acoustic shock symptoms include crackles, hisses, whistles, shrieks and high-pitched noises.
                                  dB(A) means the sound pressure level in decibels measured by a sound level meter using a type A electronic filter.
                                  dB(C) means the sound pressure level in decibels measured by a sound level meter using a type C electronic filter.  The type C filter is used to measure peak or impact sound pressure levels.
                                  hyperacusis—see subsection 6(2).
                                  MRCA means the Military Rehabilitation and Compensation Act 2004.
                                  relevant service means:
         (a)          eligible war service (other than operational service) under the VEA;
         (b)          defence service (other than hazardous service and British nuclear test defence service) under the VEA; or
         (c)          peacetime service under the MRCA.
Note: MRCA and VEA are also defined in the Schedule 1 - Dictionary.
                                  specified list of inner ear disorders means:
(a)          lateral semicircular canal dysplasia;
(b)          perilymphatic fistula;
(c)          stapes hypermobility; or
(d)          superior semicircular canal dehiscence.
                                  specified list of viral or bacterial infections means:
(a)          neurosyphilis;
(b)          Lyme disease;
(c)          Orientia tsutsugamushi infection (scrub typhus); or
(d)          Rickettsia prowazekii infection.
                                  terminal event means the proximate or ultimate cause of death and includes the following:
         (a)           pneumonia;
         (b)           respiratory failure;
         (c)           cardiac arrest;
         (d)           circulatory failure; or
         (e)           cessation of brain function.
                               time-weighted average (TWA) with a 3-dB exchange rate means the time-weighted average noise exposure level calculated according to the following formulae and shown in the table:

          TWA = 10.0  Log(D/100) + 85
        where D = daily dose; and

        D = [C1/T1 + C2/T2 + …..+ Cn/Tn]  100
        where               Cn = total time of exposure at a specified noise level; and

        Tn = exposure duration for which noise at this level becomes hazardous

Table of noise exposure levels and
durations based on 3-dB(A) exchange rate
          Duration, T           Duration, T
Exposure                                     Exposure
Level, L                                     Level, L
(dB(A))   Hours        Minutes  Seconds      (dB(A))   Hours  Minutes  Seconds