SM2BAT(+) with SMX-U1, SMX-US or SMX-UT microphones Echo … · 2016. 1. 21. · 1 Ultrasonic...

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UltrasonicCalibratorUserGuide(updated1-20-2016)

Instructionsforusewith:• SM2BAT(+)withSMX-U1,SMX-USorSMX-UTmicrophones• EchoMeterEM3(+)withbuiltinorexternalSMX-USorSMX-UT

microphone• EchoMeterTouch

NOTE:InstructionsfortheSM3BATandSM4BATwithSMM-U1orSM3-U1microphoneortheSMZCwithbuiltinorexternalSMM-U1orSM3-U1microphoneareintherespectiveUserGuidesofthoseproducts.


Introduction

Sinceultrasoundisbeyondtherangeofhumanhearing,verifyingpropersystemandmicrophoneperformancecanbeachallenge.TheUltrasonicCalibratorallowstestingofboththemicrophoneandthefullrecordersystemperformanceofallofourbatrecordingproducts.TheCalibratorhastwomodesofoperation,“CALIBRATION”and“CHIRP”.Calibrationmodeisusedtotestthemicrophoneatcloserange.Totestamicrophone,theCalibratorgeneratesacalibrated40kHztone,themicrophoneisplacedinthecalibratormicrophoneadapterandtherecorderisusedtodisplaythereceivedsignallevelwhichcanthenbecomparedtothemicrophonespecification.Thechirpmodeemitsaveryloud40kHz“chirp”andisusedtotesttheentiresystematagreaterdistance.

Battery

TheCalibratorrequiresa9Valkalinebatteryandoneisincludedwiththeunit.Thebatteryshipsinstalledbutnotconnected.Thebatteryislocatedbehindthehingeddooratthetopoftheunit.TheLEDwillnolongerilluminatewhenthebatteryisdepletedandcannolongerprovideacalibratedtone.Whiletheunitmaystillemitsoundatthispoint,itcannotbeusedasanaccuratecalibratoriftheLEDisnotilluminated.CalibratingInstructionsforSM2BAT+Models

NOTE:TheinstructionsforSM2BATandSM2BAT+unitsareslightlydifferent.Makesureyoufollowthecorrectinstructionsforyourmodel.

• Verifyyouarerunningfirmwareversion3.3.7orlater• Attachthemicrophonetoeithermicrophoneportusingamicrophoneextensioncable• InstalltheCalibratormicrophoneadapterbyslidingitontotheCalibratorfromthebottom(theend

withtheWildlifeAcousticslogo)untilitistouchingthetoggleswitches.Makesurethatthesmallerdiameterholeisnearerthetoggleswitches.TheadapterwillworkwiththeSMX-U1,SMX-USorSMX-UT.TheSMX-UTisshownbelow.

• Physicalsettings(Switches):Thegainmustbesetcorrectlyortheresultsofthistestaremeaningless.DetailedinstructionsonhowtosetthegainswitchesareinyourSM2+manual.SetthegainforthechannelyourmicrophoneisattachedtousingtheswitchesinsidetheSM2+


§ SMX-US:48dB§ SMX-UT:36dB§ SMX-U1:0dB

• Choose“CalibrateMics”fromtheutilitiesmenu.Thiswilladjustalltheprogrammablesettingsasrequired.

• TurntheCalibratoronandsetthemodeswitchto“CAL”• Lookatthevalueonthescreenontherowofthechannel(left/right)whereyourmicrophoneis

attachedandunderthecolumn@40• Insertthemicrophoneuntilitrestsagainstthesmallerdiameteroftheadapterholeasshown

• Themicrophonessensitivityisaffectedbyorientationsothemicrophoneshouldberotatedvery

slowly360degreesandthelargest(leastnegativenumber)valuenoted.Begentletoavoiddamagingtheweatherproofing.Ifthevalueisless(morenegative)thanthevaluebelow,yourmicrophonehaslostsomeorallofitssensitivity• SMX-US:-17dB• SMX-UT:-29dB• SMX-U1:-38dB

Ahigher(lessnegative)numberindicatesamoresensitivemicrophone,alowernumberindicatessomelossofsensitivity.

CalibratingInstructionsforSM2BAT,SM2BAT384andSM2BAT192X2Models

NOTE:TheinstructionsforSM2BATandSM2BAT+unitsareslightlydifferent.Makesureyoufollowthecorrectinstructionsforyourmodel.

• Attachthemicrophonetoeithermicrophoneportofyourrecorderusingamicrophoneextension

cable• InstalltheCalibratormicrophoneadapterbyslidingitontotheCalibratorfromthebottom(theend

withtheWildlifeAcousticslogo)untilitistouchingthetoggleswitches.Makesurethatthesmallerdiameterholeisnearerthetoggleswitches.TheadapterwillworkwiththeSMX-U1,SMX-USorSMX-UT.TheSMX-UTisshownbelow.


• Settings–Boththephysicaljumpersandtheprogrammableadvancedaudiosettingsmustbeadjustedorverifiedbeforerunningthetestinthenextsection.Theresultsofthetestaremeaninglessifthesettingsareincorrect.DetailedinstructionsonhowtoadjustthesesettingsareintheSM2manual.

• Setthegainforthechannelwhereyourmicrophoneisattachedusingthejumpersinsidetheunit

§ SMX-US:48dB§ SMX-UT:36dB§ SMX-U1:0dB

• AdvancedAudioSettings(Programmable)-Youmustmanuallysetseveralsettings,allintheadvancedaudiomenu.Youwillhavetosetthembackwhenyouaredonewiththecalibrationprocess,somakesuretonotetheircurrentvalues.

o Turnoffthetriggeronthechannelwhereyourmicisattachedbysettingitto0dBo Turnoffthehighpassandlowpassfiltersonthatsamechannel

• TurntheCalibratoronandsetthemodeswitchto“CAL”• Startaninstantrecordingbysimultaneouslypressingthe“up”and“down”buttonsonthe

SM2BAT+.• Nowpressthe“select”buttonandadBvaluewillbeshownforeachchannel• Insertthemicrophoneuntilitrestsagainstthesmallerdiameteroftheadapterholeasshown


slowly360degreesandthelargest(leastnegativenumber)valuenoted.Begentletoavoiddamagingtheweatherproofing.Ifthevalueisless(morenegative)thanthevaluebelow,your


microphonehaslostsomeorallofitssensitivity• SMX-US:-17dB• SMX-UT:-29dB• SMX-U1:-38dB

NOTE:SM2BAT192x2andSM2BAT384modelswillread2dBhigh.

Ahigher(lessnegative)numberindicatesamoresensitivemicrophone,alowernumberindicatessomelossofsensitivity.Remembertosettheunitbacktoyourpreferredsettingswhendone!

CalibratingInstructionsforinternalmicrophoneofEM3andEM3+Models

• Verifyyouarerunningfirmwareversion1.2.6orlater• VerifythattheEM3(+)issetwithagainof36dB.Theswitchonthesidewillbeinthemiddleposition• PutyourEM3(+)intocalibratemodebypressingthe“+”and“-“buttonssimultaneously.Theupper

rightofthescreenwillshowanegativevalue(e.g.-73.5)• Removetheplasticmicrophoneadapterfromthecalibratorbyslidingitoff.

• TurntheCalibratoronandsetthemodeswitchto“CAL”• HoldyourEM3flatagainstthecalibratorwiththemicrophonecenteredonthespeakerandupagainst

thetoggleswitchesasshownbelow


• Ifthevalueshownislessthan(morenegative)-34dBthenyourEM3(+)haslostsomeorallofitssensitivity.

• Pressanybuttontoexitcalibratemode

CalibratingInstructionsforEM3andEM3+ModelswithexternalSMX-USorSMX-UTMicrophone

NOTE:EM3/EM3+requiresfirmwareversion1.2.6orlaterforaccuratedBVmeasurementsincalibratemode

• Verifyyouarerunningfirmwareversion1.2.6orlater• VerifythattheEM3(+)issetwithagainof36dB.Theswitchonthesidewillbeinthemiddleposition.

Alsoverifythattheexternalmicrophoneisattached.• PutyourEM3(+)intocalibratemodebypressingthe“+”and“-“buttonssimultaneously.Theupper

rightofthescreenwillshowanegativevalue(e.g.-73.5)• TurntheCalibratoronandsetthemodeswitchto“CAL”• Insertthemicrophoneuntilitrestsagainstthesmallerdiameteroftheadapterholeasshown


slowly360degreesandthelargest(leastnegativenumber)valuenoted.Begentletoavoiddamagingtheweatherproofing.Ifthevalueisless(morenegative)thanthevaluebelow,yourmicrophonehaslostsomeorallofitssensitivity• SMX-US:-17dB• SMX-UT:-29dB

Ahigher(lessnegative)numberindicatesamoresensitivemicrophone,alowernumberindicatessomelossofsensitivity.

CalibratingInstructionsforEchoMeterTouch

• InstalltheCalibratormicrophoneadapterbyslidingitontotheCalibratorfromthebottom(theendwiththeWildlifeAcousticslogo)untilitistouchingthetoggleswitches.Makesurethatthesmaller


diameterholeisnearerthetoggleswitches.• TurnthecalibratoronandswitchtoCAL.• PlugintheEchoMeterTouchmoduleandstarttheEchoMeterapponyouriOSdevice.• EnterLivemodeandpressStarttostartthespectrogram.• Verifythatitisinexpandedview(thebuttonwiththreeverticalbarsshowsthebarsseparated).• Dragthedividerbetweenthewaveformandthespectrogramtomakethewaveformaslargeas

possible.• HoldyourEchoMeterTouchwiththemicrophoneelementcenteredintheholeofthemicrophone

adapterasshownbelow.


• Thewaveformshouldtakeupatleast3/4ofthewaveformareaasshowninthefollowingscreenshot.ItisOKifthewaveformtakesupmoreorallofthewaveformarea.

Chirpmode(Anyrecorder)Foratestoftheentirerecordingsystem,theUltrasonicCalibratorcanemitloudultrasonicsignalstotherecorderwhileitisrecordingfromsomedistance.Theserecordingscanbeanalyzedtoverifythattherecordersettingsareappropriateandthesystemisfunctioningasexpected.

WARNING:In“Chirp”mode,theUltrasonicCalibratoremitsa40kHzsignalatalmost100dBSPL.Prolongedexposuretohighintensityultrasonicsignalsmaycausepermanenthearinglossataudiblefrequencies.PleasedonotplacetheCalibratorclosetoyourears.

Ifyouwish,removethemicrophoneadapterfromtheCalibrator.


Switchthetoggleswitchto“CHIRP”Theunitwillemitapulsed(20%dutycycle)40kHz(+/-10Hz)toneapproximatelytwicepersecond.Theamplitudeofthetoneis94dBSPL(+/-3dB)at10cm.ThesignalcanbepickedupbytheSMX-USorSMX-UTmicrophoneortheEM3(+)andseenintherecordingatdistancesuptoabout18m.ThesoundcanalsobemonitoredfromtheSM2BAT+usingtheRealTimeExpansion(RTE)monitoringfeature.ThisfeatureisaccessedbypluggingheadphonesintotheheadphonejackunderthecircuitboardunderSDslotA.DuringarecordingtheRTEmodecanbeturnedonbypressingtheselectbutton.Youwillhearthesignalonlywhentheunitistriggeredsothiscanbeveryusefulforcheckingtheefficacyofyourtriggersettings.

NOTE:Thecalibratorissomewhatdirectional,soyoumayobserveupto10dBsignallossatslightanglesoffcenterfromadistance.

DetailedTheoryofOperation

Measuringultrasoundisdifficultforthesamereasonsthatbatsareabletouseultrasoundeffectivelytohunt.Asthetestsignalbouncesoffofsmallobjectsandreturnsanecho,thesignalcaninterferewithitselfintroducingsignificanterrorsintothemeasurement.TheWildlifeAcousticsUltrasonicCalibratorisasimpleandlowcostdesignthat,ifusedwithcare,canproduceconsistentresults.Thecalibrate“Cal”modeemitsaweak48dBSPL(+/-3dB)40kHzsignalwhenmeasuredatadistanceof30cm.Adeliberatelyweaksignalisusedsothatinterferencefromechoesofftheceilingorotherhardsurfaceswillbelostinthenoiseandhavenegligibleeffectonthemeasurement.Thefixtureandothermeasurementtechniquesdescribedabovearedesignedsuchthatthesoundpressurewaveisfreetomovepastthemicrophonebeingmeasuredwithminimalinterferenceandthedistancebetweenthecalibrator’sultrasonicspeakerandthemicrophoneremainspredictable.Thereisstillalotofroomformeasurementerrorduetothefreedomofthemicrophonetomoverelativetothecalibratorspeaker,evenwhenusingthefixture,theasymmetryofsomeofthemicrophones,and“near-field”interferenceofreflectionsaroundthecalibratorsetupitself.Wehavefoundthatbymovingthemicrophonearoundtofindthemaximumreadingyieldsthemostaccurateresultsasthemaximumpressurehastheleastamountofinterference.

SM2BAT(+) with SMX-U1, SMX-US or SMX-UT microphones Echo … · 2016. 1. 21. · 1 Ultrasonic...

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Transcript of SM2BAT(+) with SMX-U1, SMX-US or SMX-UT microphones Echo … · 2016. 1. 21. · 1 Ultrasonic...