• Noise Assessment of Stone/Aggregate Mines: Six Case Studies

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    Vibration and noise problems caused by a number of construction processes, specifically blasting for infrastructure development, are becoming important because of their civil appeal. In this study, a square root equation (SRE) with a 95% confidence level was proposed for predicting blastinginduced vibration through fullscale test blasting, and the vibration value predicted from this equation ...

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  • Rock Crusher Noise Levels

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    Noise– with only a few exceptions, noise levels (dosimetry) are usually well above the MSHA Action limit of 85 dBA. Therefore most rock crushing operations need to have a hearing conservation program. – which for most companies is just measuring their employees hearing (audiogram) every year.

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  • What Noises Cause Hearing Loss? | NCEH | CDC

    Common Sources of Noise and Decibel Levels. Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged period of time may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.

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    Determining that average to be about 48 decibels, Groll then went to a quarry to measure the noise generated by a rock crusher operating a distance of about 100 yards away — which he estimated ...

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  • Construction Noise Handbook

    Manufacturer Type or Model Peak Noise Level (dBA) Remarks Link Belt 4000 92 Within 15m 1971 mod John 609A 85 Within 15m 1971 mod Case 680C 74 Within 15m 1973 mod Drott 40 yr. 82 Within 15m 1971 mod Koehr 1066 81 84 Within 15m 2 tested Table Construction Equipment Noise Levels Based on Limited Data Samples Front Loaders.

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  • Rock Crusher Noise

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