Noise meter measurement application related
1. Measurement of radiated noise from railway locomotives and rolling stock
The measurement method can be in accordance with GB/T5111-95 "Acoustic Measurement of Radiated Noise from Railway Locomotives and Rolling Stocks"
The measurement value is required to have LPAF, and spectrum analysis measurement can also be performed. The instrument accuracy requirements are type 2 or above integrating noise meters and automatic environmental noise monitoring instruments, and the performance meets the requirements of GB3785 "Electrical and Acoustic Performance and Measurement Methods of Noise Meters".
2. Measurement of inland waterway and ship noise
The measurement method can be in accordance with GB/T4964-85 "Measurement of Radiated Noise from Ships in Inland Waterways and Ports"
The measurement value is required to have A-weighted "fast" characteristic sound pressure level Lp, A-weighted "pulse" sound pressure level Lp, and the instrument accuracy requirements are type 1 or type 2 noise meters, and the performance meets the requirements of GB3785 "Electrical and Acoustic Performance and Measurement Methods of Noise Meters".
3. Aircraft noise measurement
The measurement method can be in accordance with GB9661-88 "Aircraft noise measurement method around airports" requirements. The measured values include A-weighted "fast" characteristic sound pressure level Lp, aircraft noise effective perceived noise level Lepn, and the instrument accuracy requirements are Type 2 or above noise meters and environmental noise automatic monitoring instruments, and the performance meets the requirements of GB3785 "Electrical and acoustic properties and measurement methods of noise meters".
4. Noise source sound power level measurement
The measurement method can be in accordance with GB/T16538-96 "Acoustic sound pressure method for determining noise source sound power level using standard sound source simple method" test instrument using Type 2 or above sound level specified in GB3785, measured in slow gear, and it is best to use an extension cable or extension rod between the noise meter and the microphone.
5. Environmental vibration measurement
The measurement method can be in accordance with GB10071-88 "Urban area environmental vibration measurement method" requirements to measure VAL, VL, VLZ, VLZN. The measuring instrument should comply with the instrument for measuring environmental vibration specified in ISO/DP8041-84.
