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GB/T 7584.1-2004 English PDF

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GB/T 7584.1-2004: Acoustics -- Hearing Protectors -- Part 1: Subjective method for the measurement of sound attenuation
Status: Valid

GB/T 7584.1: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 7584.1-2004English284 Add to Cart 3 days [Need to translate] Acoustics -- Hearing Protectors -- Part 1: Subjective method for the measurement of sound attenuation Valid GB/T 7584.1-2004
GB/T 7584-1987English239 Add to Cart 2 days [Need to translate] Acoustics--Measurement of sound attenuation of hearing protectors--Subjective method Obsolete GB/T 7584-1987

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Basic data

Standard ID GB/T 7584.1-2004 (GB/T7584.1-2004)
Description (Translated English) Acoustics. Hearing Protectors. Part 1: Subjective method for the measurement of sound attenuation
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard C73
Classification of International Standard 13.340.20
Word Count Estimation 11,123
Date of Issue 2004-05-13
Date of Implementation 2004-12-01
Older Standard (superseded by this standard) GB/T 5893.3-1986; GB/T 7584-1987
Adopted Standard ISO 4869-1-1990; IDT
Regulation (derived from) Announcement of Newly Approved National Standards No. 6, 2004 (No. 68 overall)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee
Summary This standard specifies: Determination of hearing protectors in the hearing threshold at sound attenuation values ??- subjective measurement method. The methods and procedures, close to measuring hearing protectors designed for maximum sound attenuation values ??-, This sound attenuation values ??in the normal sound field test conditions have not -. Because this method results attenuation value can always be reproduced -, therefore been widely adopted. These values ??are reflected in the user presses the "subject" is the same the way when hearing protectors are worn hearing protectors sound attenuation performance. This measurement is obtained at low sound pressure levels (close to the hearing threshold) data, hearing protectors can also be reflected in a higher SPL attenuation value. But for sound attenuation and acoustic pressure amplitudes are closely related hearing protectors, When the SPL exceeds its relevant characteristics valid point, This measurement method is not applicable. Because in this SPL, using the standard method often underestimated hearing protectors sound attenuation values.

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