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JJF 1581-2016 English PDF

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US$579.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1581-2016: Calibration Specification for Hand-held Sound Field Hearing Screening Equipments
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1581-2016	579	Add to Cart	4 days	Calibration Specification for Hand-held Sound Field Hearing Screening Equipments	Valid

Similar standards

GB/T 3222.2 GB/T 3222.1 JJG 188 JJF 1580 JJF 1588 JJF 1579

Basic data

Standard ID: JJF 1581-2016 (JJF1581-2016)
Description (Translated English): Calibration Specification for Hand-held Sound Field Hearing Screening Equipments
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A59
Word Count Estimation: 25,285
Date of Issue: 2016-11-25
Date of Implementation: 2017-02-25
Regulation (derived from): State Administration of Quality Supervision, Inspection and Quarantine Notice No.116 of 2016
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine

JJF 1581-2016: Calibration Specification for Hand-held Sound Field Hearing Screening Equipments

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Calibration Specification for Hand-held Sound Field Hearing Screening Equipments National Metrological Technical Code of the People's Republic of China Standard for Calibration of Handheld Sound Field Hearing Screening 2016-11-25 release 2017-02-25 Implementation State Administration of Quality Supervision, Inspection and Quarantine issued Handheld sound field type hearing Screening instrument calibration specification ScreeningEquip ments Coordinate unit. National Acoustics Metrology Technical Committee The main drafting unit. Shanghai Institute of Metrology and Testing Technology China Institute of Metrology Participated in the drafting unit. Guangzhou Institute of Metrology and Testing Technology Fujian Institute of Metrology This specification entrusts the National Acoustics Metrology Technical Committee to explain The main drafters of this specification. Deng Zheng (Shanghai Institute of Metrology and Testing Technology) Zhou Ziwei (Shanghai Institute of Metrology and Testing Technology) Zhong Bo (China Institute of Metrology) Participate in the drafters. Zhou Changhua (Guangzhou Institute of Metrology and Testing Technology) An Zhaoliang (Shanghai Institute of Metrology and Testing Technology) Li Qun (Fujian Institute of Metrology)

Introduction (II) 1 Scope (1) 2 References (1) 3 terms and units of measurement (1) 3.1 Warp spectrum characteristics (1) 3.2 Warrior distortion characteristics (1) 3.3 Filter Polyphony (1) 4 Overview (2) 5 Metrological characteristics (2) 5.1 Warble free field audition of the baseline hearing threshold sound pressure level error (2) 5.2 Warp spectrum characteristics (2) 5.3 warhead sound pressure level controller error (2) 5.4 Warble distortion characteristics (2) 5.5 Baseline auditory threshold sound pressure level error for narrowband noise diffusion field audition (2) 5.6 Narrowband noise level controller error (2) 5.7 Wideband noise level error (2) 5.8 Filter sound pressure level error (2) 5.9 filter sound pressure level controller error (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Measurement standards and other equipment (3) 7 Calibration items and calibration methods (3) 7.1 Calibration items (3) 7.2 Calibration method (3) 8 Calibration results (8) 8.1 Calibration data processing (8) 8.2 Calibration Certificate (9) 8.3 Uncertainty of measurement of calibration results (9) 9 re-school time interval (9) Appendix A Free-field and diffuse field audiometry Listening threshold Sound pressure level (10) Appendix B Calculation method of background noise correction value (13) Appendix C Screen Format of Calibration Instrument (14) Appendix D Examples of Measurement Uncertainty Evaluation (16)

Introduction

This specification is based on JJF 1071-2010 "national measurement calibration standard preparation rules" preparation. This specification is based on the use of hand-held sound field type hearing screening device, and also refer to GB/T 4854.7- 2008 "Baseline zero level of acoustics calibration audiometric equipment Part 7. Benchmark threshold for free field and diffuse field audiometry" GB/T 7341.2-1998 "Hearing meter Part 2. Language audiometry equipment" and GB/T 16296.2-2016 "Acoustics audition method Part 2. Sound field measurement with pure tone and narrowband test signal". Evaluation and representation of the uncertainty of this specification Based on JJF 1059.1-2012 "Measurement uncertainty assessment and table Show ". This specification is the first release. Standard for Calibration of Handheld Sound Field Hearing Screening

1 Scope

This specification is applicable to the calibration of a hand-held sound field type hearing screening apparatus.

2 reference file

This specification refers to the following documents. JJG176-2005 sound calibrator JJG449-2014 octave and fractional octave filters Standard Terminology and Definitions for JJF 1001 Terminology and definition of acoustical metrological terms JJF 1034 GB 3102.7 The amount and unit of acoustics Terminology of acoustics nouns GB/T 3947-1996 GB/T 4854.7-2008 Reference zero level for acoustic calibration audiometric equipment - Part 7. Free field and diffusion Baseline hearing threshold for field audiometry Electromagnetism audiometry equipment - Part 1. Pure tone audiometer GB/T 7341.1-2010 Listening apparatus - Part 2. Language audiometry equipment GB/T 7341.2-1998 GB/T 16296.2-2016 Acoustics - Methods of audiometry - Part 2. Sound signals in pure and narrowband test signals Field audiometry For dated references, only the dated edition applies to this specification; references that are not dated , The latest version (including all modifications) applies to this specification.

3 terms and units of measurement

This specification uses the amount and unit specified in GB 3102.7. JJF 1001, JJF 1034, GB/T 3947-1996, GB/T 4854.7-2008, GB/T 7341.1- 2010, GB/T 7341.2-1998 and GB/T 16296.2-2016 and the following terms and definitions apply to this specification. 3.1 Warp spectrum characteristic value characteristicvalueofwarbletonespectrum The difference between the sound pressure level of the 1/3 octave sound zone and the maximum of the other 1/3 octave sound pressure levels. 3.2 Warble distortion characteristic value characteristicvalueofwarbletonedistortion Warp sound measurement corresponding to the center frequency of the filter where the 1/3 times the band voltage (square root value) square sum of arithmetic Square root value and 100Hz ~ 20kHz frequency range of the total voltage (root mean root value) ratio, expressed as a percentage. 3.3 filtered polyphony filteredcomplextone The polyphony of the specific frequency band retained by the filtering process. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1581-2016_English be delivered?

Answer: Upon your order, we will start to translate JJF 1581-2016_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1581-2016_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1581-2016_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+ countries

Question 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.