Tips for choosing a digital noise meter
Noise meter, also called sound level meter, is a kind of instrument to measure the sound pressure level or sound level of sound according to certain frequency weighting and time weighting, which is the most basic and commonly used instrument in acoustic measurement. Sound level meter can be used for environmental noise, machine noise, vehicle noise and other kinds of noise measurement, also can be used for electroacoustics, building acoustics and other measurements, if the condenser microphone is replaced with an accelerometer sensor, with integrator, you can use the sound level meter to measure vibration. Humidity Sensor Probe , , Stainless Steel Heater PT100 Sensor , , Cast Aluminium Heater , Heating Circle Fluid Solenoid Valve
In order to make the measurement results of the sound level meter produced by various countries in the world can be compared with each other, the International Electrotechnical Commission (IEC) formulated the relevant standards of the sound level meter, and recommended that all countries to adopt the May 1979 in Stockholm adopted the IEC 651 "Sound Level Meter" standard, China's national standard on sound level meter is GB3785-83 "Sound Level Meter Electricity, Acoustic Properties and Test Methods". 1984 IEC also adopted the IEC801 "Sound Level Meter" standard. In 1984, IEC adopted IEC804 "Integral Mean Sound Level Meter" international standard, and China promulgated GB/T17181-1997 "Integral Mean Sound Level Meter" in 1997. They are mainly consistent with the IEC standards. 2002 International Electrotechnical Commission (IEC) issued a new international standard IEC61672-2002 "sound level meter". The standard replaces the original IEC651-1979 "sound level meter" and IEC804-1983 "integral average sound level meter". According to this standard, China has formulated JJG188-2002 "Sound Level Meter" test specification. According to the new standard, the sound level meter can be divided into general-purpose sound level meter, integral sound level meter, spectrum sound level meter and so on according to the accuracy can be divided into 1 level and 2 levels, two levels of sound level meter of various performance indicators have the same centre value, only the permissible error is different, and with the level of the number of figures increases, the permissible error is relaxed. According to the volume can also be divided into desktop, portable, and pocket sound level meter. They can be classified into analogue and digital sound level meters according to their indication method. Tips for choosing a digital noise meter
