![]() In addition, this type of measurement is very expensive simply because Class 1 sound level meters are very complicated and expensive equipment. In terms of traffic noise measurement, such manual data collection method at each measurement position can be very time-consuming and expensive ( Mitsunobu et al., 2012) i.e., due to the nature of sound and noise, it is necessary to measure noise levels especially densely at a particular location. These calibrators generate a pure tone at 1000 Hz, and they produce nominally 94 dB or with some calibrators 114 dB. ![]() Sound level meters should be calibrated before use, using a pistonphone calibrator placed over the microphone. In addition, there are several other classes of sound level meters however, in this chapter, they will not be discussed (i.e., they are not significant with respect to the theme of this chapter).įinally, the sound level meter acquires the sound pressure level at a particular location, and furthermore, it needs to be calibrated before and after each set of measurements. It is usually used for assessing noise in work environments, basic environmental measurements, entertainment noise, construction noise, and vehicle noise. Ĭlass 2-general purpose grade for field use with a tolerance of ☑.0 dB. ![]() It is ideal for laboratory use, environmental applications, building acoustics, and traffic assessments.
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