Several uses of sound level meters
From the perspective of measuring objects, it can be divided into the measurement of environmental noise (sound field) characteristics and the measurement of sound source characteristics.
2. From the time characteristics of the sound source or field, it can be divided into steady-state noise measurement and non-stationary noise measurement (noise with a sound level fluctuation of no more than 3dB (A) during the measurement time is considered steady-state noise, otherwise it is called non-stationary noise). Unsteady noise can be divided into periodic variation noise (noise with significant periodicity in sound level changes during measurement time), irregular variation noise, and pulse noise (pulse noise is discontinuous, composed of irregular pulses or noise peaks with short duration and large amplitude, as explained in the reference book: noise with duration less than 0.5 seconds and interval greater than 1 second).
3. From the frequency characteristics of the sound source or field, it can be divided into broadband noise (noise with a flatter spectral density map), narrowband noise, and noise containing prominent pure tone components.
4. From the perspective of measurement accuracy requirements, it can be divided into precision measurement, engineering measurement, and noise survey, etc
Integral sound level meter is used to measure the equivalent sound level of unstable noise over a period of time. (TES1353)
A noise dosimeter is also an integral sound level meter, mainly used to measure noise exposure. (TES1355, AWA5610 series)
Pulse type sound level meter is used to measure pulse noise, which conforms to the response of the human ear to pulse sound and the average time of the human ear's response to pulse sound. (CEL-254)
