3M eg4 user manual Range of sound, What do the standards say?

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Dosimetry

Range of sound

Range of sound

Sound pressure is measured in decibels, or tenths of a Bel. Sound pressure level is indicated as dB SPL. Since the human ear can detect sounds with an extensive range of amplitude, a decibel scale is used to simplify the measurement results. For example, the ratio between the threshold of hearing and threshold of pain in the human ear if measured in true energy is 10,000,000 times! The same range using the dB scale is 0 - 140 dB referenced to 20 µPa (Micropascals).

The quietest sound that humans can hear has an amplitude of approximately 0 dB. Prolonged exposure to sound pressure levels exceeding 85 dB can cause permanent damage to the ear. Sound levels in excess of 130 dB are more than the human ear can safely withstand and can result in serious pain and permanent damage.

What do the standards say?

Many organizations have studied and analyzed the effects of high sound exposure on hearing. As a result, standards were developed to regulate personal noise exposure. In the United States, the Occupational Safety and Health Administration (OSHA), the Mine and Safety and Health Administration (MSHA), and the American Conference of Governmental Industrial Hygienists (ACGIH) have all created regulations and limitations on total permissible noise exposure. International standards are specified by the health and safety regulations such as the European Union (EU) Directive 2003/10/EC. Additionally, the International Electrotechnical Commission (IEC) IEC-61252 has specific guidelines and regulations to monitor noise in the workplace.

To access these copyrighted standards, please refer to the following:

OSHA - http://www.osha.gov

MSHA- http://www.msha.gov

NIOSH - http://www.cdc.gov/niosh/topics/noise

ACGIH - http://www.acgih.org/

IEC - http://www.iec.ch

053-644, Rev H

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Contents 3M The Edge Personal Noise Dosimeter EdgeTable of Contents Time history…………………………………………………………………………………………………… Setting-up the Edge via DMSViewing measurements on the display Stopping a studyTechnical Support Replacing microphone and windscreenINDEX………………………………………………………………………………… Physical attributes of EdgeDock1 and EdgeDock5List of Tables List of FiguresEdge and dosimetry DosimetryIllustration of how the dosimeter operates and processes Noise dosimeterWhat do the standards say? Range of soundApplications of the Edge Noise assessment steps Setting-up your dosimeter parameters for your noise studiesRunning your studies View your results via DMSEdge Model Parameter setup screen for eg4Identifying your equipment Checking the equipmentTurning on LED indicatorTurning off LED indicators explainedDisplay and keypad Diagram3MTMDetection Mangement Software DMS Docking station functionalityLoading Docking station components EdgeDock1 or EdgeDock5EdgeDock1 and EdgeDock5 components  Powering EdgeDock1 or EdgeDock5 Powering EdgeDock1 or EdgeDock5Charging your dosimeter  How to chargeStoring the dosimeter Mounting the docking station to a wallNoise studies Understanding what data is storedTime history Summary dataLogging Views on the EdgeDefinitions of data log values and views Views on ExplanationDosimeter views and definitions Views on Explanation Edge WeightingDose Response LevelDosimeter measurement descriptors/variants Descriptors Variants Lmax variantsCommunicating & downloading data DockingNew Hardware wizard for Edge Dock Customizing set-up parameters in DMSDosimeter screen Dosimeter settingDosimeter fields explained for the Edge Edge dosimeter settingsEdge display screen Display settingEdge security setting Security settingEdge auto run screen Auto Run setting10 Edge firmware update screen Firmware update11 Saving and sending Edge setups Saving and sending/setting configurationsQuick Help List typical dosimetry session Overview of running a studyWindscreen and maintenance  How to attach the dosimeterPositioning the Edge on your shirt  Checking battery power Checking battery power Calibrating the dosimeter Calibrating Reset Resetting the dosimeterSetting contrast on dosimeter  ContrastOn/off/enter button  How to run a noise study Running studiesStarting a run  How to stop a noise study Indicators/Icons on the displayIndicator Icon Explanation Indicators i.e., run, stop, battery, and OLViewing measurements on the display Locking or securing your dosimeter during run Viewing measurements  How to unlock  How to lock or secureLocking or Securing Unlocking Downloading Downloading dataDMS start screen  Selecting and viewing data Viewing data and data finderExample of Edge Report in DMS Report ViewPanel layout view viewing the data in charts and graphs Panel Layout Viewcharts/graphsTechnical Support LED indicator disable/enableReplacing microphone and windscreen Attaching/Detaching Attaching/Detaching the windscreen and microphone Hard Hat Attachment kit Hard Hat Attachment KitStandards Mechanical characteristicsElectrical characteristics Environmental effectsUser Interface Physical attributes of EdgeDock1 and EdgeDock5 EdgeDock1 and EdgeDock5Measurements TypesMeasurement parameters Special functions CommunicationsSecurity Auto-RunEdge Block Diagram Edge Block Diagram Appendix B Warranty 3M ServiceService Department and Technical Support 1 800 Contacting 3MBackground Noise, effects Glossary of TermsCombining Noise sources Crest FactorCriterion Level CL Decibel dB Criterion TimeDose Exchange Rate ER also known as the Doubling RateHearing Conservation HC Hertz Hz Free field setting microphoneLavg Average Level Lep,dLogging Leq Equivalent LevelMaximum Level Lmax Measurement RangeProjected Time PEL Permissible Exposure LevelRandom incidence microphone Response TimeThreshold TWA Time Weighted AverageWeighting A, C, Z, etc Upper Limit ULWindscreen Measurement equations Index Running studies About Us About 3M Personal Safety
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