Noise measurements from noise meters can be divided into which categories
It is well known that the vibration will produce noise, such as: rotating machinery, impact, resonance, friction, etc., and the flow of noise generated by the place, environmental noise, noise generated by combustion, other noise. The generation of noise brings us the influence of life and work. To know the size of the noise we need to use noise measuring instruments.
Noise meter is also called (noise meter, sound level meter) is the basic instrument in noise measurement. A sound level meter is generally composed of a condenser microphone, a preamplifier, an attenuator, an amplifier, a frequency meter network, and an RMS indicator head. The working principle of a sound level meter is: the microphone converts the sound into an electrical signal, and then the preamplifier transforms the impedance to match the microphone with the attenuator. The amplifier adds the output signal to the network, weights the signal for frequency (or external filter), and then amplifies the signal to a certain amplitude by the attenuator and amplifier, and sends it to the RMS detector.
Noise meters are mainly used to determine the environmental noise, do noise engineering, quality control and health prevention. Such as for factories, offices, traffic roads, audio, home and air conditioning, refrigerators and other occasions of noise measurement. So, the noise meter noise measurement can be divided into which categories? Zhuhai Tianchuang Instrument Company summarizes the following points for you:
1, from the measurement object, can be divided into environmental noise (sound field) characteristics of the measurement and sound source characteristics of the measurement.
2、From the time characteristics of sound source or sound field, it can be divided into steady state noise measurement and non-steady state noise measurement. The non-stationary noise can be divided into periodic change noise, irregular change noise and impulse sound.
3、From the frequency characteristics of the sound source or sound field, it can be divided into broadband noise, narrowband noise and noise containing prominent pure tone components.
4、From the precision of measurement requirements, it can be divided into precision measurement, engineering measurement and noise census.
