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CSA - Z107.56-94

Procedures for the Measurement of Occupational Noise Exposure

inactive
Organization: CSA
Publication Date: 1 March 1994
Status: inactive
Page Count: 40
scope:

This Standard describes procedures for the determination of the occupational noise exposure level (Lex,T) using sampling techniques. Lex,T represents the long-term noise exposure of employees. It is calculated from measurements of the equivalent sound level (Leq,t) in the workplace.

The procedures in this Standard normally form part of any occupational hearing conservation program. The user of this Standard should be proficient in noise measurement.

This Standard provides procedures for measuring the occupational noise exposure from all types of noise, eg, continuous noise, pure tones, and impulse noise. All types of noise (including impulse noise) are measured in terms of equal energy.

This Standard can be used for determination of the noise exposure level of individuals (Lex,T) or extended to groups (LTRADE) with similar noise exposures. It can also be used to measure the noise exposure (Leq,t) from a given job or activity (eg, operating a particular machine).

This Standard provides for measurements in terms of Leq,t (3 dB exchange rate) and calculation of (Lex,T). Procedures for calculating related quantities, such as Pa2h, are provided.

This Standard may also be used for the measurement of LOSHA (5 dB exchange rate) and calculation of associated indices as shown in Appendix D. In this case, the results may not be a good representation of exposure to impulsive noise.

Note: Measurements taken in Leq cannot be converted to LOSHA or vice versa, unless the time distribution of sound levels is known.

This Standard provides procedures to determine the noise exposure level of employees with a given precision. In certain cases, the user is only interested in determining that an employee's exposure is above or below the criterion level. The procedures in this Standard can be relaxed in this case when the noise exposure level is either far above or far below the criterion level.

Document History

January 1, 2018
Measurement of noise exposure
This Standard describes methods for determining the occupational noise exposure level of workers (Lex,T) using sampling techniques. Lex,T represents the long-term noise exposure of workers and is...
August 1, 2013
Measurement of noise exposure
This Standard describes procedures for determining the occupational noise exposure level of workers (Lex,T) using sampling techniques. Lex,T represents the long-term noise exposure of workers and is...
January 1, 2013
Measurement of noise exposure
This Standard describes procedures for determining the occupational noise exposure level of workers (Lex,T) using sampling techniques. Lex,T represents the long-term noise exposure of workers and is...
March 1, 2006
Procedures for the measurement of occupational noise exposure
This Standard describes procedures for determining the occupational noise exposure level of workers (Lex,T) using sampling techniques. Lex,T represents the long-term noise exposure of workers and is...
March 1, 2006
Procedures for the measurement of occupational noise exposure
This Standard describes procedures for determining the occupational noise exposure level of workers (Lex,T) using sampling techniques. Lex,T represents the long-term noise exposure of workers and is...
March 1, 2006
Procedures for the measurement of occupational noise exposure
This Standard has been written for measurements using Leq and Lex in recognition that these descriptors are universally regarded as superior to LOSHA as a means of assessing employee noise exposure....
March 1, 1994
Procedures for the Measurement of Occupational Noise Exposure
This Standard describes procedures for the determination of the occupational noise exposure level (L ex,T) using sampling techniques. L ex,T represents the long-term noise exposure of employees. It...
March 1, 1994
Procedures for the Measurement of Occupational Noise Exposure
This Standard describes procedures for the determination of the occupational noise exposure level (Lex,T)u sing sampling techniques. Lex,T represents the long-term noise exposure of employees. It is...
Z107.56-94
March 1, 1994
Procedures for the Measurement of Occupational Noise Exposure
This Standard describes procedures for the determination of the occupational noise exposure level (Lex,T) using sampling techniques. Lex,T represents the long-term noise exposure of employees. It is...

References

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