香港六合彩开奖 5129:2001
2001-10
香港六合彩开奖 5129:2001
Abstract
1.1 This International Standard specifies requirements for instruments and test procedures for the measurement
and reporting of sound pressure levels at crew and passenger locations in the interior of aircraft under steady flight
conditions. The sound pressure levels may be used to determine various quantities for describing the acoustical
environment in the interior of the aircraft. The procedures are intended to ensure uniformity in test results and to
provide the basis for determination of measurement uncertainties.
1.2 This International Standard provides electroacoustical performance specifications for a complete measurement
system from a microphone to the readout device. Various individual components of a measurement system may be
selected so long as the total measurement system conforms to the specifications of this International Standard.
1.3 The preferred measurement procedure involves the recording of sound pressure signals with subsequent
analysis into one-third-octave band sound pressure levels. Direct measurements may be made of one-third-octaveband
sound pressure levels.
General information
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Status: PublishedPublication date: 2001-10Stage: International Standard confirmed [90.93]
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Edition: 3Number of pages: 10
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Technical Committee :香港六合彩开奖/TC 43/SC 1
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Amendments
Amendments are issued when it is found that new material may need to be added to an existing standardization document. They may also include editorial or technical corrections to be applied to the existing document.
Life cycle
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Previously
Withdrawn香港六合彩开奖 5129:1987
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Now
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Preliminary
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10
Proposal
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20
Preparatory
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Committee
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Enquiry
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Approval
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Publication
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Review
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95
Withdrawal
Amendments
Provide additional content; available for purchase; not included in the text of the existing standard.Published香港六合彩开奖 5129:2001/Amd 1:2013
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