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Sound Level Meter Standards

In order to get accurate and repeatable measurements, it is essential that a sound level meter meets the relevant standards. Most measurement regulations will state the standards that should be met by the equipment.

To satisfy most regulations, new meters should meet the standard ANSI S1.4 to either Type 1 or Type 2 or IEC 61672 to Class 1 or Class 2. There are other standards for the Calibrator, for noise dosimeters, noise exposure meters, octave band filters and so on. Here is a summary of the most important standards.

Sound Level Meter Standards

     
Standard Relates To  
     
IEC 61672 Sound Level Meters Electroacoustics - Sound level meters
This is the most recent sound level meter standard and the one that modern measurement regulations will require.
Grades in order of accuracy: Class 1, Class 2
     
IEC 60651 Sound Level Meters Specification for Sound Level Meters
This standard has been superseded by IEC 61672. Older meters meeting this standard can still be used for many applications. Originally this standard was called IEC 651, but was renamed IEC 60651.
Grades in order of accuracy: Type 1, Type 2
     
IEC 60804 Sound Level Meters Integrating-Averaging Sound Level Meters
This standard has been superseded by IEC 61672. It was originally called IEC 804 but was renamed IEC 60804. It extends IEC 60651 and describes the performance of Integrating sound level meters.
     
ANSI S1.4 Sound Level Meters Specifications for Sound Level Meters
The American standard for sound level meter performance. Very similar to IEC 60651.
Grades in order of accuracy: Type 1, Type 2
     
ANSI S1.43 Sound Level Meters Specifications for Integrating-Averaging Sound Level Meters
The American standard for Integrating sound level meters. Similar to IEC 60804.
     
IEC 61260 Sound Level Meters Octave-band and Fractional-octave-band Filters
Defines the performance for both analogue and digital octave band filters. Includes fractional filters, such as 1/3 octave band filters.
     
ANSI S1.11 Sound Level Meters Octave-Band and Fractional-Octave-Band Analog and Digital Filters
American standard defining octave band, 1/3 octave band and other fractional octave filters. Similar to the IEC 61260 standard.
     
IEC 60942 Sound Calibrators Electroacoustics - Sound Calibrators
Defines the performance and accuracy of sound level calibrators. Originally called IEC942, it was renamed to IEC60942.
Grades in order of accuracy: Class 1, Class 2
     
ANSI S1.40 Sound Calibrators Specifications and Verification Procedures for Sound Calibrators
The American standard for sound level calibrators.
Grades in order of accuracy: Type 1, Type 2
     
IEC 61252 Noise Dosemeters Specifications for personal sound exposure meters
Defines the requires for a PSEM or noise dosemeter.
     
ANSI S1.25 Noise Dosemeters Specification for Personal Noise Dosimeters
American standard for noise dosimeters.

 

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