What are the types of noise measurement by noise meter?
What types of noise measurement can be divided into? We all know that vibration will produce noise, such as: rotating machinery, impact, resonance, friction, etc., as well as noise generated by flow field, environmental noise, noise generated by combustion, and other noises. The generation of noise has an impact on our life and work. If you want to know the size of the noise, you need a noise measuring instrument.
Noise meter, also known as (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 effective value indicating meter. The working principle of the 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, performs frequency weighting on the signal (or an external filter), and then amplifies the signal to a certain amplitude through the attenuator and the amplifier, and sends it to the RMS detector.
The noise meter is mainly used to measure environmental noise, do noise engineering, quality control and health prevention and control. For example, it is used for noise measurement in various occasions such as factories, offices, traffic roads, audio systems, homes, air conditioners, refrigerators, etc. So, what types of noise measurement can be divided into? Zhuhai Tianchuang Instrument Co., Ltd. summarized the following points for everyone:
1. From the measurement object, it can be divided into the characteristic measurement of environmental noise (sound field) and the measurement of sound source characteristics.
2. From the time characteristics of the sound source or sound field, it can be divided into steady-state noise measurement and unsteady-state noise measurement. Non-stationary noise can be divided into periodic noise, irregular noise and pulse 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 accuracy of measurement requirements, it can be divided into precision measurement, engineering measurement and noise survey.
