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Subchapter 7. General Industry Safety Orders
Group 15. Occupational Noise
Article 105. Control of Noise Exposure

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Appendix C

Audiometric Test Rooms

Rooms used for audiometric testing shall not have background sound pressure levels exceeding those in Table C-1 when measured by equipment conforming at least to the Type 2 requirements of ANSI S1.4-1971 (R1976), and to the Class II requirements of ANSI S1.11-1971 (R1976).

                           Table C-1

Maximum Allowable Octave-Band Sound Pressure Levels for
                Audiometric Test Rooms

Octave-band center
frequency (Hz)...............  500   1000    2000     4000    8000
Sound pressure level (dB)..... 40      40      47       57      62

NOTE: Authority and reference cited: Section 142.3, Labor Code.


1. Amendment filed 10-3-83; effective thirtieth day thereafter (Register 83, No. 41).

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