Section 157.31. Types of measurement systems which may be used

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The sound level measurement system shall meet or exceed the requirements of American National Standard Specifications for Sound Level Meters, ANSI S1.4—1971, approved April 27, 1971, issued by the American National Standards Institute, throughout the applicable frequency range for either:
(1) A Type 1 sound level meter.
(2) A Type 2 sound level meter.
(3) A Type S sound level meter which has the following:
(i) A-weighting frequence response.
(ii) Fast dynamic characteristics of its indicating instrument.
(iii) A relative response level tolerance consistent with those of either a Type 1 or Type 2 sound level meter, as specified in Section 3.2 of ANSI S1.4—1971.

Notation

Cross References

This section cited in 67 Pa. Code § 157.42 (relating to ambient conditions); and 67 Pa. Code § 157.43 (relating to location and operation of sound level measurement system).

                    
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