Weighting A, C, Z | 3M SE-400 manual

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Appendix B

Weighting (A, C, Z)

SPL measurements are commonly weighted (scaled) in relation to their frequency components in order to provide a consistent basis for comparison to other measurements of the same type. The three Sound Examiner curves are plotted in Figure B-5.

Figure B-5:All frequency weightings plotted together

Windscreen

A covering for a microphone that reduces disturbances caused by wind and direct contact with other surfaces.

Sound Examiner SE-400 Series

Image 45

3M SE-400 user manual Weighting A, C, Z

Contents

Sound Examiner 3MTM Sound Examiner SE-400 is Series Sound Level Meter 3MTM Sound Examiner SE-400 non-IS Models Sound Level Meter RevA Table of Contents Iii Table of Contents Figures Sound Examiner SE-400 Series overview IntroductionModels and options Display and keypad Screen components identified Diagram and functionalityKeypad Description Keypad keys identified 3MTM Detection Management Software DMS Connectors/Ports Checking the equipment Getting Started Screen indicators Turning onSoftkeys Turning off Measurement/Start screenMeasurement screen views Navigating Charging states Charging Response time and frequency weighting settings Setup/instrument configuration Opening the Setup screen Opening the setup screen for instrument configuration Setting up meter parameters Meter settings Meter settings explained Meter settings ExplanationsSE-400 Series information details  Unit Information screen  Setting the Time and Date parameters Time and date setting  Setting the Timed Run Auto-Run and setting timed run  Lock/unlock secure setup Security locking and unlocking run/setup Secure run mode and secure setup mode locking & unlocking  Lock/unlock secure run Memory and space Resetting the SE-400 SeriesDeleting files and viewing memory  Viewing memory and/or deleting files Calibrate, measure, run, and saved results Operation/Field TestingCalibrate Overview of running a session SE-400 Series and calibrating Calibration screen Measure Logged DataWindscreen Measurements and displayed parameters Positioning and tripod mountMeasurement Explanations Parameters Measurement notations Run, stop, and view results Main/multi- measurement screen in Run mode 10 Session directory screen Viewing past sessions 12 Reviewing Session Data Download and view logged data 14 Downloading files from DMS to SE-400 Series DMS & downloaded measurements Connecting the printer and settings SoundPatrol feature non-IS models only  Changing the summary report print settings Print setup for summary reports Printing and reports Summary Data ReportCalibration Report Connecting an extension cable Microphone preampAttaching the preamp Logging Rates seconds or minutes Days Sound Examiner non-IS models and logging rates Standards/Directives Acoustical CharacteristicsMicrophones Appendix a Environmental Characteristics Mechanical CharacteristicsPhysical Characteristics Measurements User Interface Characteristics Power/Electrical CharacteristicsPorts and connections SE-400 Series models and part numbers Accessories sold separately Glossary of Terms Appendix BExchange Rate ER Noise Reference pressure SPL/LAS Weighting A, C, Z Warranty Customer serviceCalibration Contacting 3M Instrumentation Data Addendum Data Addendum SE-400 Series measuring to IEC Microphone Weighting Effects of background noise sections 5.6.4, 5.6.5, 9.2.5d Correction in dB Frequency weighting sections 5.1.10 Weighting Nominal Weighting Typical Graph below is the Typical Z weighting frequency response Nominal Frequency Hz Nominal Nominal Frequency Hz Nominal corrections in dB Data Addendum 3350 Nominal Frequency Hz Nominal corrections in dB Data Addendum Nominal Data Addendum BK4936 microphone Free Field Pressure Field to Data Addendum Data Addendum Data Addendum Data Addendum Data Addendum Data Addendum QE7052 microphone Data Addendum Random Incidence Windscreen BK4936 microphone & RIC Ricr & windscreen BK4936 microphone, Ricr Remote preamp Windscreen Remote preamp, & Ricr Pressure to random incidence corrections with QE7052 section Windscreen Windscreen corrections with BK4936 microphone Frequency Resetting Overload, Under Range, Maximum, and Peak .2.5 k AC/DC Output Characteristics section Electrostatic discharges .5.2, 9.2.7 b Directional windscreen corrections section Microphones Data Addendum Environmental effects .1.2 and 9.3L Index Index QE7052 microphone side facing Index Index Index Index Index BK4936 microphone side facing Index BK4936 microphone back facing Index Index Index Index Index Index Index 100 101 102 103 104 105 106 107 108 109 110 111 112 113 About Us About 3M Personal Safety