Abstract： IEC 61672-1:2002 pdf free download.Electroacoustics -Sound level meters -Part 1: Specifications. 1.3 Sound level meters specified in this standard are intended to measure sounds generally in the range of human hearing. NOTE For measurement...

IEC 61672-1:2002 pdf free download.Electroacoustics -Sound level meters -Part 1: Specifications.

1.3 Sound level meters specified in this standard are intended to measure sounds generally in the range of human hearing.

NOTE For measurement of audible Sound In the presence of ultrasound, the AU weighting, specified In IEC 61012 (1), may be applied.

1.4 Two performance categories, class 1 and class 2, are specified in this standard. In general, specifications for class 1 and

temperatures. Tolerance limits for class 2 specifications are greater than, or equal to, those for class 1 specifications.

1.5 This standard is applicable to a range of designs for sound level meters. A sound level meter may be a self-contained hand-held instrument with an attached microphone and a built- in display device. A sound level meter may be comprised of separate components in one or more enclosures and may be capable of displaying a variety of acoustical signal levels. Sound level meters may include

extensive analogue or digital signal processing, separately or In combination, with multiple analogue and digital outputs. Sound

level meters may include general-purpose computers, recorders, printers, and other devices that form a necessary part of the

complete instrument.

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