GB/T 17561-1998: Instruments for the measurement of sound intensity - Measurement with pairs of pressure sensing microphones

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Scope

The primary purpose of this Standard is to ensure the accuracy of measurements of sound
intensity applied to the determination of sound power in accordance with GB/T 16404.To meet
the requirements of GB/T 16404, instruments are required to analyze the sound intensity in one-
third octave or octave bands, and optionally to provide A-weighted band levels. They are also
required to measure sound pressure level in addition to sound intensity level to facilitate the use
of the field indicators described in GB/T 16404.
This Standard only applies to instruments which detect sound intensity by pairs of spatially
separated pressure sensing microphones.
This Standard specifies performance requirements for instruments used for the measurement of
sound intensity, and their associated calibrators.
The requirements are intended to reduce to a practical minimum any differences in equivalent
measurements made using different instruments, including instruments comprising probes and
processors from different manufacturers.

Basic Data

Standard ID	GB/T 17561-1998 (GB/T17561-1998)
Description (Translated English)	Instruments for the measurement of sound intensity. Measurement with pairs of pressure sensing microphones
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	M72
Classification of International Standard	33.160.60
Word Count Estimation	22,248
Date of Issue	11/10/1998
Date of Implementation	7/1/1999
Adopted Standard	IEC 61043-1993, IDT
Issuing agency(ies)	State Quality and Technical Supervision
Summary	This standard specifies the sound intensity meter calibrator and its associated performance requirements. These requirements are designed to use different instruments including acoustic intensity meter probes from different manufacturers and processors consisting of an equivalent measure that minimizes the differences.