1.1 This specification is for measurement systems used in making sound pressure level measurements in buildings in accordance with ASTM International standards and guides. Systems for making sound pressure level measurements in other environments are not addressed in this specification. The systems addressed include one or more microphones and associated components to process the output of the microphone(s) and display the sound pressure level(s). Where the measurement system conforms to IEC 61672-1:2002, it is sufficient to specify the class of the measurement system and that direction is given in the user manual for proper use. Where the system is composed of components, specifications are given for microphone type and orientation, filters, and windscreens. 1.2 The values in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
There is little consistency in the standards written in Committee E33 on the specification of the instruments used for measuring sound pressure levels. This specification is being written to provide a basis for consistency. This standard would be referenced in other standards written by ASTM E33.
sound level meter; measurement system; microphone, free field; random incidence; pressure
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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