ASTM-E1179 › Standard Specification for Sound Sources Used for Testing Open Office Components and Systems
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This specification states the requirements for sound sources used for measuring the speech privacy between open offices or for measuring the laboratory performance of acoustical components. The sound source shall be a loudspeaker enclosed in a box that has a maximum dimension of 0.30 m (1 ft) on a side, to reduce spurious sound reflections. The measurements shall be carried out in a free sound field. The measurement microphone, amplifier, and level meter used to measure sound pressure levels shall satisfy the requirements prescribed. When the sound source is driven with the qualification signal, the sound output shall be adequate to maintain one-third octave-band sound pressure levels at least 10 dB above the corresponding background noise in each band at each measurement location. The directivity of the sound source shall be verified by driving the source with the qualification signal and measuring the sound pressure levels at measurement points.
Scope
1.1 This specification states the requirements for sound sources used for measuring the speech privacy between open offices and for measuring the laboratory performance of acoustical components (see Test Methods E1111 and E1130).
1.2 The sound source shall be a loudspeaker located in an enclosure driven with an appropriate test signal.
1.3 This specification describes the sound source and method of qualifying it using a special qualification signal. Test signals required by open office test methods may differ.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Keywords
loudspeaker; open office; open office components; open office components and systems; sound; sound source directivity; sound sources;; ICS Number Code 17.140.01 (Acoustic measurements and noise abatement in general)
To find similar documents by ASTM Volume:
04.06 (Thermal Insulation; Building and Environmental Acoustics)
To find similar documents by classification:
17.140.01 (Acoustic measurements and noise abatement in general Including acoustic insulation)
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Document Number
ASTM-E1179-13(2019)
Revision Level
2013 R19 EDITION
Status
Current
Modification Type
Reapproval
Publication Date
May 9, 2019
Document Type
Specification
Page Count
3 pages
Committee Number
E33.02