HJ 707-2014 English PDF

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HJ 707-2014: Techniacal specifications for environmental noise monitoring structure-borne indoor noise form associated facilities
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Basic data

Standard ID: HJ 707-2014 (HJ707-2014)
Description (Translated English): Techniacal specifications for environmental noise monitoring structure-borne indoor noise form associated facilities
Sector / Industry: Environmental Protection Industry Standard
Classification of Chinese Standard: Z32
Word Count Estimation: 12,125
Date of Issue: 10/30/2014
Date of Implementation: 1/1/2015
Quoted Standard: GB 3785.1; GB 12348; GB 22337; GB/T 3241; GB/T 15173; HJ 706-2014
Regulation (derived from): Ministry of Environmental Protection Notice 2014 No. 70
Issuing agency(ies): Ministry of Ecology and Environment
Summary: This standard specifies the structure-borne noise monitoring fixture indoor equipment, field survey methods, monitoring methods, monitoring and evaluation of data quality assurance and quality control and other technical requirements. This standard applie

HJ 707-2014: Techniacal specifications for environmental noise monitoring structure-borne indoor noise form associated facilities

---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.
Techniacal specifications for environmental noise monitoring structure-borne indoor noise form associated facilities People's Republic of China National Environmental Protection Standards Environmental noise monitoring technical specifications Structure-borne noise interior fixtures Technical Specifications for Environmental Noise Monitoring Structure-borne Indoor Noise From Associated Facilities (release draft) Issued on.2014-10-30 2015-01-01 implementation Issued by the Ministry of Environmental Protection

Table of Contents

Preface ..II 1. Scope .1 2 Normative references 1 3 Terms and definitions 4 measuring instruments and measurement conditions .2 5 on-site survey and monitoring 3 6 .4 background noise correction 7 .4 monitoring results evaluation 8 Quality Assurance and Quality Control .4 Appendix A (informative) fixed structure-borne noise monitoring equipment recorded in Table 5 Relationship between Annex B (informative) indoor low-frequency noise and structure-borne noise fixture determination ..8

Foreword

To implement the "People's Republic of China Environmental Protection Law" and "People's Republic of China Environmental Noise Pollution Prevention Law" to regulate "work Industrial enterprises of environmental noise emission standard plant boundary "(GB 12348) and" social life of environmental noise emission standards "(GB 22337) in Junction Configuration monitoring the spread of fixed equipment noise, the development of this standard. This standard specifies the structure-borne noise monitoring fixture indoor equipment, field survey methods, monitoring methods, monitoring data Evaluation and quality assurance and quality control and other technical requirements. The Standard Appendix A, Appendix B is an informative annex. This standard is developed by the Ministry of Environmental Protection Science, Technology organization. This standard drafting units. China National Environmental Monitoring Center, Wuhan Environmental Monitoring Center. This standard MEP October 30, 2014 for approval. This standard since January 1, 2015 implementation. The standard explanation by the Ministry of Environmental Protection. Environmental noise monitoring technical specifications structure-borne noise interior fixtures

1 Scope

This standard specifies the structure-borne noise monitoring fixture indoor equipment, field survey methods, monitoring methods, monitoring data Evaluation and quality assurance and quality control and other technical requirements. This standard applies to "boundary of industrial enterprises of environmental noise emission standards" (GB 12348) and "social life of environmental noise emission standards Quasi "(GB 22337) monitoring structure-borne noise predetermined fixed equipment caused interior noise. Other fixed structure-borne equipment Interior noise measurements can be performed with reference to the present method.

2 Normative references

The standard content of the following documents cited in the articles. Where undated references, the valid version applies to this standard. GB 3785.1 electric acoustic sound level meters - Part 1. Specification GB 12348 industrial enterprises of environmental noise emission standard plant boundary GB 22337 social life of environmental noise emission standards GB/T 3241 octave and fractional octave filters GB/T 15173 acoustic calibrator HJ 706-2014 environmental noise monitoring noise measurement value correction Technical Specifications

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Noise-sensitive buildings noise-sensitive buildings Refers to hospitals, schools, institutions, research institutes, such as the need to keep quiet residential building. 3.2 Structure-borne noise indoor fixtures Structure-borne indoor Noise From Associated Facilities Means the fixed spread to the noise emissions from equipment noise sensitive building interior inspired interior noise through the building structure. 3.3 Affected room The influenced room Structure-borne noise by fixed indoor equipment room. 3.4 Suspicious sound source device Suspicious sound source equipment Noise emission and noise propagation through the structure to affect the room fixture by. 3.5 Octave band SPL Sound Pressure Level in Octave Used in line with band SPL octave filters GB/T 3241 provisions measured. 3.6 Stationary noise Steady noise Within the measurement time, the measured sound level of the sound source is not greater than 3dB fluctuation noise, the noise is stationary. 3.7 Non-steady non-stationary noise In measuring time, undulating sound level measured sound source is greater than 3dB noise is non-stationary noise.

4 measuring instruments and measurement conditions

4.1 Measuring instruments and performance requirements 4.1.1 The sound level meter and filter Measuring instrument performance should be consistent with GB 3785.1 type 1 sound level meter requirements; noise spectrum analysis filter performance should be consistent with GB/T Filter requirements in 3241, with real-time spectrum analyzer, the measurement range should meet the needs of the measurement noise. other request Accordance with GB 12348, GB 22337 and other standards. 4.1.2 Acoustic Calibrator Calibration instruments should be consistent with GB/T 15173 Type 1 sound calibrators requirements. 4.2 Measurement conditions Accordance with GB 12348, GB 22337 and other standards. 5 on-site survey and monitoring 5.1 Scene Investigation Site survey content and methodology, see appendix Table A.1, Appendix B. 5.2 Monitoring Methods According to the conclusions of the survey 5.1 site, monitoring methods are divided into two kinds of situations. when a suspicious sound source device can identify the sound source is located and suspicious Preparation time is not able to identify. Wherein, when a suspicious sound source device can recognize, according to equipment operating status, shutting down and can not be divided into Shutting down two states. Monitoring results are reported in Table reference Table A.2. 5.2.1 suspicious sound source can be identified 5.2.1.1 Monitoring Sites Laid 1-3 monitoring points in the affected room, including the middle of the room and may be affected by noise point of maximum points. Measurement The amount of the above position from the wall or other reflective surface 0.5m, from the ground 0.5 ~ 1.2m. Measurement process, close the door of the test room, window; Close all the test chamber may interfere with noise measurement sound source (such as televisions, air conditioners, fans, ballasts, and other sound facilities); Exclude the test room and the surrounding environment, man-made noise, interference from other vibration, such as walking, talking, and other housework. 5.2.1.2 Monitoring Project Monitoring projects include. the equivalent A sound level for each octave band sound pressure level of background noise. Measured simultaneously at night when there are non-stationary noise A maximum amount of sound level. 5.2.1.3 monitoring period Respectively, in the daytime, at night were two periods, the measurement period shall cover the maximum emission state measured sound source. The sound source under test is stable Mode noise measurement 1min equivalent A sound level and each octave band sound pressure level; non-stationary noise source under test, measuring a representative period Equivalent A sound level and each octave band sound pressure level. Can not shut down when the background measurement 5.2.1.4 suspicious sound source device When a suspicious sound source device can not be shut down, the background measurement is not optional acoustic sources on suspicious device, and the background sound and Test Environment Indoor close proximity room measurements. 5.2.2 Unable to identify suspicious sound source Due to technical reasons and other reasons can not identify suspicious sound source can be monitored and issue monitoring reports, no monitoring data According to the judge.

6 background noise correction

Equivalent A sound level and sound pressure level for each octave band measurements are required to carry out background noise correction, the specific process by HJ 706-2014 "ring Ambient noise monitoring technical specifications noise measurement value correction "of the relevant provisions.

7 Evaluation of monitoring results

7.1 Evaluation Criteria Measurement results of the individual measuring points according to the structure GB 12348 and GB 22337 fixed spread specified equipment room noise emission limits Individually assessed. 7.2 sound source device can identify suspicious Monitoring results (after background corrected equivalent A sound level, any band sound pressure level by doubling the background corrected, and by the sound source is located The maximum sound level) itemized with GB 12348 and GB 22337 provisions fixture structure-borne noise emission limits into the interior equipment issued Comparing to evaluate suspicious sound source device is exceeded. 7.3 suspicious sound source device is not able to identify Due to technical reasons and other reasons can not identify suspicious sound source, you can monitor and issue a monitoring report shall indicate in the report Can not identify suspicious sound source device, do not judge Status monitoring data.

8 Quality Assurance and Quality Control

8.1 Monitoring art Every time site monitoring at least two monitors to attend. 8.2 Measuring Instruments Use metrology and conformity within the period of validity of the measurement noise measurement instruments. Noise measurement instruments shall be measured before and after each Site using sound calibrator Acoustic Calibrator, its front and rear calibration indication deviation of not more than 0.5dB, otherwise the measurement is invalid. 8.3 Monitoring Record Complete required records and fill in the relevant monitoring table.

Appendix A

(Informative) Structure-borne noise monitoring equipment fixed record table Table A.1 Affected room site survey Table A.2 fixed structure-borne noise monitoring equipment records Table A.1 Affected room site survey Site investigation purpose is to make the art to understand the field and laboratory monitoring, basic circumstances, identify suspicious sound source position Set for monitoring sites layout, monitoring schedule and monitor the results of the evaluation to provide evidence. 1 monitors the affected room description. (1) Residential form. □ independent (the first layer, co-layer) □ conjoined (the first layer, co-layer) (2) Room size. □ long □ □ width height (3) determination of monitors suspicious sound source location. (4) monitoring low-frequency noise can feel the room. □ Living room □ □ study □ Other Bedroom (5) relatively strong monitoring noise perceived by location. □ □ middle of the room close to the wall near the floor □ □ Other (6) low-frequency noise occurrence period. (sleep/often) □ daytime (early/mid/late) night □ □ Other (7) Time period. □ continuous □ short □ change (per minute) (8) monitors the description of the noise. □ □ feel the ground vibrating device emits hear the rattle can be heard □ Buzzing sound □ Other (9) when closing a window monitors feeling. □ □ worse □ changed for the better to hear the noise □ hear noise (10) adjacent residential whether the same feeling.

2 monitors around the room to survey the environment

(1) the affected nearby room floor plan; (2) the presence in the vicinity of the affected rooms sound equipment, such as pumps, compressors, cooling towers, air conditioner outdoor unit, elevator Well, fans, etc.; (3) affected the health of the room near the road and railway; (4) Other special instructions.

3 suspicious sound source equipment survey

(1) there is a greater possibility of determining suspicious sound source device; (2) suspicious sound source device operating time; (3) sound source device suspected source strength and spectrum measurements (distance suspicious sound source as close as possible suspicious device 1m external sound source Location of the device layout monitoring point. (4) Refer to Appendix B, suspicious sound source device determines whether it is caused by the influence of the room noise reasons.

4 when the sound source is not recognized

Repeated survey to determine when unrecognized, noted in the monitoring report. Table A.2 fixed structure-borne noise monitoring equipment records Test Name. Address. Monitoring Date. Monitoring by. Weather conditions. measuring point (available separately drawings). Monitoring Instrument Model. ID. Acoustic Calibrator Model. Number. calibration standard value. Main source. former monitor calibration. calibration value monitoring. Measurement conditions. Schematic (marked orientation, the layout of the sound source, noise-sensitive buildings, the relative positions of the measuring points) Monitoring sites measuring time maximum A sound level dB (A) Equivalent A sound level dB (A) Octave band sound pressure level (dB) 31.5Hz 63Hz 125Hz 250Hz 500Hz Noise measurements Background noise level Correction value Noise measurements Background noise level Correction value Noise measurements Background noise level Correction value Reviewer. Reviewer. Measuring people.

Appendix B

(Informative) Interior noise of low frequency structure-borne noise relationship fixtures and determination It lists four kinds of reference method for determining the relationship between indoor low frequency noise and structure-borne noise fixture. 1. Check the fixed equipment room noise emission boundary condition When the fixing device outside the room when the boundary noise emissions exceeded, the fixtures and the room is likely to be affected correlation. If Necessary steps should be taken to make clear judgments. The subjective feeling based monitoring suspicious sound source device Monitors can accurately distinguish fixtures open, stop and run state, it determined that the fixed equipment associated with the affected room. Monitors can not accurately distinguish fixtures open, stop and operating status can not be determined that the fixed equipment associated with the affected room. 3. The sound level changes according to the affected room In the two kinds of fixed equipment startup and shutdown conditions, were measured by the impact of C-weighted sound level and the A-weighted sound level in the room, namely, Count two kinds of conditions of each C-weighted sound level and A-weighted sound level difference. If the difference is more than two power shutdown significant difference between the two Increased and more than 20dB, the fixing device can be determined with the affected room noise related. 4. The fixation device features low-frequency spectrum peak judgment suspicious sound source device Low-frequency noise is generally more stable focus on some major band spectrum will produce characteristic peaks. In the anchoring device On, Off spectrum measurement, if the device is operating a fixed frequency octave band sound pressure level measured value exceeds the background value 5dB, table Ming indoor sound environment affected by structure-borne noise of fixed equipment. Example. a room affected by structure-borne noise in indoor fixture, according to the specification for monitoring, surveillance and night Deduct the correction value of the background noise in Table B.1. Table B.1 structure-borne noise monitoring results interior fixtures Monitoring Project octave band sound pressure level (dB) 31.5Hz 63Hz 125Hz 250Hz 500Hz Night standard value 6,951,393,024 Noise measurements 4751383826 Background noise value 4,551,372,623 Compliance compliance compliance correction value 38 23 Table B.1 monitoring results, 250Hz frequency noise measurement value exceeds the value of the background noise at night and more than 5dB standard limit, Correction value after deducting the background noise is still more than the standard limit, indicating that the indoor sound environment by structure-borne noise fixture Movies ring. ......

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