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GB/T 14369-2011: Acoustics -- Measurement methods of insertion loss, echo reduction and sound absorption coefficient for underwater acoustical material samples
Status: Valid GB/T 14369: Evolution and historical versions
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| GB/T 14369-2011 | English | 439 |
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Acoustics -- Measurement methods of insertion loss, echo reduction and sound absorption coefficient for underwater acoustical material samples
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GB/T 14369-2011
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| GB/T 14369-1993 | English | 359 |
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Acoustics. Measurement method of insertion loss and echo reduction for the underwater acoustical material sample
| Obsolete |
GB/T 14369-1993
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PDF similar to GB/T 14369-2011
Basic data | Standard ID | GB/T 14369-2011 (GB/T14369-2011) | | Description (Translated English) | Acoustics -- Measurement methods of insertion loss, echo reduction and sound absorption coefficient for underwater acoustical material samples | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A59 | | Classification of International Standard | 17.140 | | Word Count Estimation | 19,134 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-05-01 | | Older Standard (superseded by this standard) | GB/T 14369-1993 | | Quoted Standard | GB/T 3223-1994; GB/T 3947-1996 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 22 of 2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the pulse tube method, free -field and near-field measurement of the pressure tank underwater acoustic material sample insertion loss and echo reduction and sound absorption coefficient measurement method, measurement conditions, measurement devices and measurement uncertainty. This standard applies to the sound of water samples of materials and component insertion loss and echo reduction and sound absorption coefficient measurement, wherein the pulse tube method for measurement of small samples, free field method and the pressure tank near-field method for large sample measurement different bands. | GB/T 14369-2011: Acoustics -- Measurement methods of insertion loss, echo reduction and sound absorption coefficient for underwater acoustical material samples
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Acoustics.Measurement methods of insertion loss, echo reduction and sound absorption coefficient for underwater acoustical material samples
ICS 17.140
A59
National Standards of People's Republic of China
Replacing GB/T 14369-1993
Acoustic underwater acoustic material sample insertion loss, echo
Measurement methods and reduce the absorption coefficient
Acoustics-Measurementmethodsofinsertionloss, echoreductionandsound
Issued on. 2011-12-30
2012-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 Symbols 2
5 pulse tube method 3
6 7 free field method
7 pressure tank 10 near-field method
8 measurement result report 12
References 14
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard is GB/T 14369-1993 "acoustic underwater acoustic material sample insertion loss and echo reduction measuring method" amendment.
The standards are compared with the GB/T 14369-1993 The following major changes.
--- The standard name "acoustic underwater acoustic material sample insertion loss measurement method and echo reduction" by the words "acoustic underwater acoustic material
Sample insertion loss and echo reduction and methods of measurement of the absorption coefficient ";
--- Information about the underwater acoustic absorption coefficient of the sample material derived content measuring method;
--- Increasing the digital measuring device pulse tube method and the free-field method;
--- Increased broadband pulse pile up in the free-field method;
--- Increasing the pressure tank near-field method;
--- Remove the original Appendix A, the contents written to standard text.
This standard replaces GB/T 14369-1993 "acoustic underwater acoustic material sample insertion loss measurement method and echo reduction."
This standard was proposed by the Chinese Academy of Sciences.
This standard by the National Standardization Technical Committee of Acoustics (SAC/TC17) centralized.
This standard drafting unit. China Shipbuilding Industry Corporation seventh fifteen Research Institute, Chinese Academy of Sciences Institute of Acoustics.
The main drafters of this standard. Li water, Luoma Qi, Zhao, Yan Yi, Mo Kihei, Cui, Wang Jin, Miao Rongxing, Lo Chun Mei, Panghai Ou.
Acoustic underwater acoustic material sample insertion loss, echo
Measurement methods and reduce the absorption coefficient
1 Scope
This standard specifies the pulse tube method, free-field method and the pressure tank near field measurement of underwater acoustic material sample insertion loss and acoustic echo reduction
Measurement methods, measurement conditions factor, measuring apparatus and measurement uncertainty.
This standard applies to the sound of water sample materials and components (hereinafter referred to as sample) insertion loss, echo reduction and measuring the absorption coefficient, wherein the pulse
Red tube method for measuring a small sample of the free-field method and the pressure tank near-field method is suitable for measuring large sample of different frequency bands.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 3223-1994 Acoustics underwater acoustic transducer free-field calibration method
GB/T 3947-1996 Acoustics Terminology
3 Terms and Definitions
GB/T 3947-1996 and defined the following terms and definitions apply to this document.
3.1
Pulse tube pulsetube
In which the emission, propagation and reception of acoustic pulses, for measuring the acoustic characteristics of the sample material or component parameters of water-filled rigid walled gold
Metal tube.
Note. The pulse tube is generally thick-walled tube, placed vertically, the wall thickness of the thick-walled tube means is not less than the inner radius of the tube.
3.2
Free field freefield
Homogeneous and isotropic medium, boundary effect can be neglected sound field.
3.3
Pressure tank pressuredvessel
In which the emission, propagation and reception of acoustic pulses, for measuring the acoustic characteristics of the sample material or component parameters can be added just hydrostatic water-filled
Seal tank.
Note. The tank is generally placed vertically in the tank is generally placed in the order from bottom to top respectively transmit transducers, hydrophones, samples, and acoustic hydrophone wedge.
3.4
Sound pressure transmission coefficient soundpressuretransmissioncoefficient
At a given frequency and environmental conditions, water medium plane sound wave incident to the infinite plate-like sample surface that transmits sound waves and the incident sound pressure
Compression ratio.
Note. the actual measurement at the edge effect is negligible, the sample is equivalent to a finite infinite sample.
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