GB/T 7584.1-2004 English PDFUS$284.00 ยท In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7584.1-2004: Acoustics -- Hearing Protectors -- Part 1: Subjective method for the measurement of sound attenuation Status: Valid GB/T 7584.1: Historical versions
Basic dataStandard 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13.340.20 Word Count Estimation: 11,123 Date of Issue: 2004-05-13 Date of Implementation: 2004-12-01 Older Standard (superseded by this standard): GB/T 5893.3-1986; GB/T 7584-1987 Adopted Standard: ISO 4869-1-1990; IDT Regulation (derived from): Announcement of Newly Approved National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. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 7584.1-2004_English be delivered?Answer: Upon your order, we will start to translate GB/T 7584.1-2004_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 7584.1-2004_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 7584.1-2004_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 7584.1-2004?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7584.1-2004 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
