Selection of Sound Level Meters for Noise Measurement
1.Acoustics-environmental noise measurement sound level meter
Measurement methods can be in accordance with GB3222-94 "Acoustics Environmental Noise Measurement Methods".
Requirements for the measurement of LA, LAeq, LN (L5, L10, L50, L90, L95), Ld, Ln, the precision of the instrument requires more than 2-type integral sound level meter and automatic monitoring instruments for environmental noise, performance in line with the provisions of the GB3785 "sound level meter electrical and acoustic performance and measurement methods".
2.Urban environmental noise measurement sound level meter
Measurement method 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 sound level meter and automatic monitoring instruments for environmental noise, performance in line with the provisions of GB3785, "Sound Level Meter Electricity, Acoustic Performance and Measurement Methods".
3. Industrial noise measurement sound level meter
Measurement method 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-type sound level meter and environmental noise automatic monitoring instruments, performance in line with the provisions of GB3785 "sound level meter electrical, acoustic performance and measurement methods".
4. Sound level meter for noise measurement at construction site
Measurement method can be in accordance with GB12524-90 "Noise Measurement Methods of Construction Site".
Requirements for the measurement value of LAeq, the precision of the instrument requirements for more than 2-type integral sound level meter and environmental noise automatic monitoring instruments (dynamic range of not less than 50dB), the performance in line with the provisions of GB3785 "sound level meter electrical, acoustic performance and measurement methods".
5. Motorized vehicle noise measurement sound level meter
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-weighted "fast" characteristics of the sound pressure level Lp, the precision of the instrument requirements of 1-type or 2-type sound level meter, the performance in line with the provisions of GB3785 "sound level meter electrical and acoustic performance and measurement methods".
6. Railway rolling stock radiation noise measurement sound level meter
Measurement method can be in accordance with GB/T5111-95 "Acoustics Railway Rolling Stock Radiated Noise Measurement".
Requirements for the measurement of the value of LPAF, but also for spectral analysis measurements, the accuracy of the instrument requires more than 2-type integral sound level meter and environmental noise automatic monitoring instruments, performance in line with the provisions of GB3785 "sound level meter electrical and 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 Harbors".
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, the precision of the instrument requirements of the 1-type or 2-type sound level meter, performance in line with the provisions of GB3785 "sound level meter electrical and acoustic performance and measurement methods".
8.Aircraft noise measurement sound level meter
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-type sound level meter and environmental noise automatic monitoring instruments, performance in line with the provisions of GB3785 "sound level meter electrical, acoustic performance and measurement methods".
9. Noise source sound power level measurement sound level meter
Measurement method can be in accordance with GB/T16538-96 "Acoustics Sound 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, sound level meter and microphone between the best use of extension cables or extension rods.
10.Environmental vibration measurement
Measurement method can be in accordance with GB10071-88 "Measurement Methods of Environmental Vibration in Urban Areas".
Requirements for measuring VAL, VL, VLZ, VLZN, the measuring instrument should be in accordance with ISO/DP8041-84 for the measurement of environmental vibration instrumentation
