Composition and working principle of noise analyzer
Noise analyzer, also known as noise meter (noise meter, sound level meter) is the most basic instrument in noise measurement. A sound level meter is generally composed of a condenser microphone, a preamplifier, a noise meter picture 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, and then amplifies the signal to a certain amplitude through the attenuator and the amplifier, and sends it to the RMS detector
