2. measuring equipment installed at the belt or bag, employees who want to measure and install the microphone on the shoulder or shoulder or protect workers clothes firmly. Never dropped or swing The microphone is located at the ear level of no more than 30 cm and RADIUS, and the installation must not create a nuisance or obstruct their performance measurement, as well as a description of the various practices and do not understand the purpose properly, such as a microphone, sound recording not come to phueanopnakngan others. The machine is not going to be around to save the value (s), etc., if you want to check the sound level that is not fixed in any area can be used to gauge the cumulative volume measurements as well.3. open the machine will start to read the volume and record a variety of information to finish the set up time by measuring the time from the start, setting the work.4. bring up the volume measure (D) calculate the average sound level (TWA) workers exposed constantly to work each day (May 7, 8, 12 hours or so) is the average noise level at the time of 8 hours (8-hour TWA) for the units dBA or use results from table A2.5. the value of the calculated hours TWA8 must not exceed 90 DB a.
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