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10 noise measurement standards

1

 Acoustic-environmental noise measurement

The measurement method can be in accordance with GB3222-94

The required measurement values areLA、LAeq、LN(L5,L10,L50,L90,L95)、Ld、Ln

The precision of the instrument is more than 2 type integrated sound level meter and environment 

noise automatic monitoring instrument

Performance in accordance with GB3785 "sound level meter electrical, acoustic performance and 

measurement methods" provisions


2

 Measurement of urban environmental noise

       The measurement method can be in accordance with GB/ t14623-93

       

       The measurement values are required to include LA, LAeq, LN(L10, L50, L90), Ld and LN, 

       and the precision of the instrument is required to be over 2 type integrated sound level meters and automatic 

       monitoring instrument for environmental noise. 

       The performance is in line with the provisions of GB3785 for measuring electrical, 

       acoustic performance and measurement methods of sound level meters.


3

Industrial noise measurement

The measurement method can be in accordance with gb12349-90 

<measuring method of factory boundary noise of industrial enterprises>

The measurement values are required to be LA and LAeq, and the precision of the 

instrument is required to be over 2 type sound level meter and automatic monitoring

instrument for environmental noise. 

The performance conforms to the provisions of GB3785 

"sound level meter electricity, sound performance and measurement method"


4

Construction site noise measurement

The measurement method can be in accordance with gb12524-90 

The measurement value is required to be LAeq, and the precision of the instrument 

is required to be over 2 type integrated sound level meter and environmental 

noise automatic monitoring instrument (dynamic range is not less than 50dB). 

The performance conforms to the provisions of GB3785 

"sound level meter electrical and acoustic performance and measurement methods".

 

5
Measurement of fixed noise of motor vehicle

The measurement method can be in accordance with 

GB/ t14365-93 acoustic motor vehicle noise measurement method.

The measurement value is required to have A weight of A "fast" characteristic sound pressure level Lp, 

and the accuracy of the instrument requires type 1 or type 2 sound level meter, 

whose performance conforms to the provisions of GB3785 sound level meter electricity, 

sound performance and measurement methods.

6
Measurement of radiation noise of railway rolling stock

The measurement method can be measured in accordance with 

GB/ t5111-95 acoustic locomotive vehicle radiation noise measurement.

The measurement values are required to be LPAF, and spectral analysis and measurement 

can also be carried out. 

The precision of the instrument is required to be over 2 type integrated sound level meter and 

automatic monitoring instrument for environmental noise. 

The performance is in accordance with GB3785 "electrical and acoustic performance of 

sound level meter and measurement method".


7
Noise measurement of inland waterways and ships

The measurement method can be in accordance with 

GB/ t4964-85 "measurement of radiation noise from ships in inland waterways and ports".

The measurement value is required to have A weight "fast" characteristic sound pressure level Lp, A 

weight "impulse" sound pressure level Lp, and the precision of the instrument requires type 1 or type 2 

sound level meter, whose performance conforms to the provisions of GB3785 sound level meter electricity, 

sound performance and measurement methods.


8
Aircraft noise measurement

The measurement method can be in accordance with 

gb9661-88 aircraft noise measurement method around the airport.

The measurement value is required to be A weighted "fast" characteristic sound pressure level Lp, 

and the aircraft noise can effectively sense noise level Lepn. For the precision of the instrument, 

type 2 or above sound level meters and automatic monitoring instrument for environmental noise are required.


9
Measurement of noise source sound power level

The measurement method can be used in accordance with 

GB/ t16538-96 standard simple method for the determination of noise source sound power level by 

acoustic sound pressure method.

The testing instrument USES the sound level of type 2 or above specified in GB3785, measured with slow gear, 

and it is best to use the extension cable or extension rod between the sound level meter and the microphone.


10
Environmental vibration measurement

The measurement method can be according to 

gb10071-88 "urban regional environmental vibration measurement method".

Measure VAL, VL, VLZ, VLZN. The measuring instrument shall comply with the

ISO/ dp8041-84 instrument for measuring environmental vibration

In recent years, some people have classified the sound level into four categories: 

type 0, type 1, type 2 and type 3. Their accuracy is 0.4 decibels, 0.7 decibels, 1.0 decibels and 1.5 decibels, respectively.

 


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