Choosing an instrument to measure multiple sounds
Selection of noise meters for several types of noise measurements
It is reported that, for the sake of uniformity, the international and domestic have developed a number of noise measurement standards, these standards not only provide for the method of noise measurement, but also provides for the need to use the technical requirements of the noise meter, we can be based on these standards in order to better choose the right noise meter.
1.Acoustic-environmental noise measurement
Measurement methods can be in accordance with GB3222-94 "acoustic environmental noise measurement methods".
Requirements for the measurement value of LA, LAeq, LN (L5, L10, L50, L90, L95), Ld, Ln, the precision of the instrument requirements for more than 2-type integral noise meter and automatic monitoring instruments for environmental noise, the performance in line with the provisions of the GB3785 "noise meter electrical and acoustic performance and measurement methods".
2.Measurement of urban environmental noise
Measurement methods can be in accordance with GB/T14623-93 "Measurement Methods of Environmental Noise in Urban Areas".
Requirements for the measurement of LA, LAeq, LN (L10, L50, L90), Ld, Ln, the precision of the instrument requirements for more than 2-type integral noise meter and automatic monitoring instruments for environmental noise, performance in line with the provisions of GB3785 "Noise Meter Electricity, Acoustic Performance and Measurement Methods".
3. Noise measurement of industrial enterprises
Measurement methods can be in accordance with GB12349-90 "industrial enterprises plant noise measurement methods".
Requirements for the measurement value of LA, LAeq, the precision of the instrument requires more than 2 types of noise meters and environmental noise automatic monitoring instruments, performance in line with the provisions of GB3785 "noise meter electrical and acoustic performance and measurement methods".
4.Measurement of noise at construction sites
Measurement methods can be in accordance with GB12524-90 "construction site noise measurement methods".
Requirements for the measured value of LAeq, the precision of the instrument requirements for more than 2-type integral noise meter and automatic monitoring instruments for environmental noise (dynamic range of not less than 50dB), performance in line with the provisions of GB3785 "Noise Meter Electricity, Acoustic Performance and Measurement Methods".
5. Motor vehicle noise measurement
Measurement methods can be in accordance with GB/T14365-93 "acoustics Motor vehicle noise measurement methods".
Requirements for the measurement of the value of A weighting "fast" characteristics of the sound pressure level Lp, the precision of the instrument requirements of 1-type or 2-type noise meter, performance in line with the provisions of GB3785 "noise meter electricity, acoustic performance and measurement methods".
6.Measurement of railway rolling stock radiation noise
Measurement method can be in accordance with GB/T5111-95 "acoustics railway rolling stock radiation noise measurement".
Requirements for the measurement of the value of LPAF, can also be measured for spectral analysis, the precision of the instrument requires more than 2-type integral noise meter and environmental noise automatic monitoring instruments, performance in line with the provisions of GB3785, "Noise Meter Electricity, Acoustic Performance and Measurement Methods".
7. Measurement of inland waterway and ship noise
Measurement method can be in accordance with GB/T4964-85 "Measurement of Radiated Noise from Ships in Inland Waterways and Harbours".
Requirements for the measurement of the value of A-weighted "fast" characteristics of the sound pressure level Lp, A-weighted "impulse" sound pressure level Lp, on the accuracy of the instrument requirements of the 1-type or 2-type noise meter, the performance in line with the provisions of the GB3785 "noise meter electrical and acoustic performance and measurement methods".
8.Aircraft noise measurement
Measurement method can be in accordance with GB9661-88 "around the airport aircraft noise measurement methods".
Requirements for the measurement of the value of A-weighted "fast" characteristics of the sound pressure level Lp, aircraft noise effective feeling noise level Lepn, the precision of the instrument requires more than 2 types of noise meters and environmental noise automatic monitoring instruments, performance in line with the provisions of GB3785, "Noise Meter electrical and acoustic performance and measurement methods".
9. Noise source sound power level measurement
Measurement method can be in accordance with GB/T16538-96 "Acoustics Acoustic Pressure Method for Determining Sound Power Level of Noise Sources Using Standard Sound Source Simple Method".
Test instrument using GB3785 in the provisions of the type 2 or more than 2 types of sound level, measured with a slow stop, between the noise meter and microphone * good use of extension cables or extension rods.
10.Environmental vibration measurement
Measurement methods can be in accordance with GB10071-88 "Measurement Methods of Environmental Vibration in Urban Areas".
Requirements for the measurement of VAL, VL, VLZ, VLZN. Measuring instruments should be in line with ISO/DP8041-84 in the provisions of the instrument used to measure environmental vibration.
