What types of instruments are used for measuring noise?
The most common instruments used for measuring noise are the sound level meter (SLM), the integrating sound level meter (ISLM), and the noise dosimeter. It is important that you understand the calibration, operation and reading the instrument you use. The user’s manual provided by the instrument manufacturer provides most of this information. Table 1 provides some instrument selection guidelines. Table 1 Guidelines for Instrument SelectionType of MeasurementAppropriate Instruments (in order of preference)ResultCommentsPersonal noise exposure1) DosimeterDose or equivalent sound levelMost accurate for personal noise exposures2) ISLM*Equivalent sound levelIf the worker is mobile, it may be difficult to determine a personal exposure, unless work can be easily divided into defined activities. 3) SLM**dB(A)If noise levels vary considerably, it is difficult to determine average exposure. Only useful when work can be easily divided into defined activities and noise levels are relatively stable
