Detector Characteristics of Noise Meter
For dosimeters with "calibration" gears, the calibration method can refer to the verification regulations. For most dosimeters without "calibration" gears, follow the steps below:
a. Set the amplitude of the 1000Hz sinusoidal signal applied to the dosimeter according to the standard system indicated sound level in Table 1 of this article;
b. Apply the signal from the previous step to the dosimeter, and record the duration when the dosimeter shows 100%;
c. Add the sound burst with a frequency of 2000Hz to the standard system, and adjust the signal amplitude so that it is the same as that of step (a);
d. Apply the sound burst from the previous step to the dosimeter, and record the displayed value of the dosimeter after the same duration as in step (b). For Class 2 dosimeters, the indicated value should be between 79% and 126%.
