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Get Pricelouder levels than a single source alone decibels are measured on a logarithmic scale so noise levels cannot be added by standard addition Defining the extent of project related noise requires the following steps 1 Estimate the equipment noise level for the project 2 Estimate the background sound level In most cases this can
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Get PriceAt break time during the workingdays the noise level had an average value of dB A The structural integrity of buildingsrecorded values ranging from 8 to 36 KPa The ones with high values were constructed by theconstruction companies with concrete and sandcrete blocks with good foundation On the otherhand the local buildings werebuilt
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Get PriceThe Noise Reduction Rating NRR needed for each piece of equipment is given For equipment not listed please contact EH S at 392 1591 for an evaluation Noise Source Sound Level NRR Needed Time Allowed Airboat 108 dBA 30 2 minutes Band Saw 104 dBA 26 6 minutes Blender 91 dBA 13 2 hours Blower 99 dBA 21 19 minutes Concrete Saw 112 dBA 34 1 minute
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Get PriceHere s a short video I recorded earlier today showing my decibel meter set to dBC more accurately measuring low frequencies while I drive 20 MPH down an average quality neighborhood street in Los Angeles Noise levels average 95 97 dB and go as high as 105 dB at one point Geez Not good
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