It can be used to detect indoor noise levels, keep children quiet to ensure the quality of classes, and guide students to choose the toys and games that suit them to protect their hearing.
It can be used to detect factory noise levels to determine whether to wear an instrument to protect hearing or to detect machine noise by detecting noise.
It can be used to detect the noise level of the exhaust system of the car, so that the noise level of the car exhaust is in line with the noise level of the city vehicle, and it is not afraid of illegal rules.