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JJF 1146-2006 English PDF

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US$449.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1146-2006: Calibration specification for acoustic characteristcs of anechoic water tanker
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1146-2006	449	Add to Cart	3 days	Calibration specification for acoustic characteristcs of anechoic water tanker	Valid

Similar standards

GB/T 3222.2 GB/T 3222.1 JJG 188 JJG 1190 JJF 2012 JJG 1146

Basic data

Standard ID: JJF 1146-2006 (JJF1146-2006)
Description (Translated English): Calibration specification for acoustic characteristcs of anechoic water tanker
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A59
Word Count Estimation: 17,136
Date of Issue: 2006-05-23
Date of Implementation: 2006-08-02
Quoted Standard: GB/T 3102.7-1993; GB/T 3223-1994; GB/T 3947-1996; GB/T 14369-1993; JJF 449-2001; JJF 1034-2006
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to the acoustic characteristics of anechoic water tank, including free-field anechoic pool area, pool interface sound pressure reflection factor and pools to determine the noise floor. Evaluation can also be used as a basis muffler acoustic characteristics pond.

JJF 1146-2006: Calibration specification for acoustic characteristcs of anechoic water tanker

---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 acoustic characteristcs of anechoic water tanker National Metrology Technical Specification of the People's Republic Acoustic pool acoustic characteristics calibration specification Released on.2006-05-23 Implementation of.2006-08-23 The General Administration of Quality Supervision, Inspection and Quarantine issued Acoustic pool acoustic characteristics calibration specification This specification was approved by the General Administration of Quality Supervision, Inspection and Quarantine on May 23,.2006, and Implemented on August 23,.2006. Focal Point. National Acoustic Metrology Technical Committee Main drafting unit. Institute of Acoustics, Chinese Academy of Sciences Participated in the drafting unit. China Shipbuilding Industry Corporation Seventh Five-Year Research Institute China Testing Technology Research Institute This specification is interpreted by the National Acoustic Metrology Technical Committee. The main drafters of this specification. Zhu Houqing (Institute of Acoustics, Chinese Academy of Sciences) Yuan Wenjun (Seventh Five-Year Research Institute of China Shipbuilding Industry Corporation) Participate in the drafters. Zhao Han (Seventh Five-Year Research Institute of China Shipbuilding Industry Corporation) Shang Guohua (China Testing Technology Research Institute) Cui Zheng (Institute of Acoustics, Chinese Academy of Sciences)

1 Scope (1) 2 Citations (1) 3 terms and units of measurement (1) 3.1 Echo interference (1) 3.2 Free field area range (1) 3.3 Free field frequency range (1) 3.4 Pool noise floor (1) 4 Overview (1) 5 Measurement characteristics (2) 5.1 Free field area (2) 5.2 Free field frequency range (2) 5.3 Sound pressure reflection factor of pool interface (2) 5.4 Noise floor in the pool (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Standards and other equipment (3) 7 Calibration items and calibration methods (3) 7.1 Calibration Project (3) 7.2 Calibration method (4) 8 Expression of calibration results (6) 8.1 Processing of calibration results (6) 8.2 Re-study interval (6) Appendix A Measurement of Echo Interference by Pulse Acoustic Method and Transfer Impedance Method (7) Appendix B Inner Page Format of Calibration Certificate (9) Appendix C Uncertainty Evaluation of Calibration Results (11) Acoustic pool acoustic characteristics calibration specification

1 Scope

This specification applies to the acoustic characteristics of the muffler pool, including the free field area of the muffler pool, and the sound pressure of the pool interface. Determination of the shot factor and the noise floor of the pool. It can also be used as a basis for evaluating the acoustic characteristics of the muffler pool.

2 Citations

GB/T 3102.7-1993 The amount and unit of acoustics GB/T 3223-1994 underwater acoustic transducer free field calibration method GB/T 3947-1996 acoustic terminology GB/T 14369-1993 Method for measuring insertion loss and echo reduction of underwater acoustic materials JJF 449-2001 octave and 1/3 octave filter JJF 1034-2006 Acoustic measurement terminology and definition Use of this specification should be done with the current valid version of the above cited documents.

3 terms and units of measure

This specification uses the relevant terms and definitions in GB/T 3947-1996 and JJF 1034-2006. This specification uses the quantities and units specified in GB/T 3102.7-1993. 3.1 Echoic interference value (echoicinterferencevalue) The ratio of the combined sound pressure amplitude of the direct sound and the reflected sound in the anechoic pool to the direct sound pressure amplitude is multiplied by the common logarithm 20, in dB. 3.2 Free field area range (free[sound]fielddomain) a sound field with an echo interference of 0 dB or an upswing that does not exceed a certain agreed value in a given frequency range geographic range. 3.3 Free field frequency range (free[sound]fieldfrequencyrange) The amount of echo interference at a given measurement position and measurement distance in the anechoic pool is 0 dB or the undulation does not exceed a certain The frequency range of the setting. 3.4 Pool noise floor (backgroundnoiseofwatertank) In the pool, noise in the water other than the noise of the test equipment and the equipment itself received by the hydrophone, such as outside Boundary vibrations and noise caused by noise in the pool.

4 Overview

The muffler pool is mainly used for the transmission of basic hydroacoustic values, underwater electroacoustic parameter calibration and hydroacoustic equipment measurement. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1146-2006_English be delivered?

Answer: Upon your order, we will start to translate JJF 1146-2006_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 JJF 1146-2006_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1146-2006_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.