G.2095Page1GlobalResearchjournalofNaturalScience&Technology(GRJNST)Volume:04-Issue3(2026),2095ISSNP:2790-7643ISSNE:2790-7651www.grjnst.nethttps://doi.org/10.53762/grjnst.04.03.16DigitalPureToneAudiometer:ASmartandSelf-AdministeredHearingTestSystemReceived:02April2026.Accepted:06May2026.Published:30May2026InstituteofBiomedicalEngineeringandTechnology,FacultyofBasicMedicalSciences,LiaquatUniversityofMedicalandHealthSciences,Jamshoro,76090,PakistanPareesaShoropareesabuxshoro@gmail.comAlizaInstituteofBiomedicalEngineeringandTechnology,FacultyofBasicMedicalSciences,LiaquatUniversityofMedicalandHealthSciences,Jamshoro,76090,Pakistanalizarana43@gmail.comHamnaKhanAliasPalwashaInstituteofBiomedicalEngineeringandTechnology,FacultyofBasicMedicalSciences,LiaquatUniversityofMedicalandHealthSciences,Jamshoro,76090,Pakistanhamnakayy@gmail.comSaeedAhmedMaitloInstituteofBiomedicalEngineeringandTechnology,FacultyofBasicMedicalSciences,LiaquatUniversityofMedicalandHealthSciences,Jamshoro,76090,Pakistansaeed.maitlo@lumhs.edu.pkGRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16Copyright©2026GRJNST.ThisarticleispublishedunderanOpenAccessmodel.ItismadeavailabletothepublicunderthetermsoftheCreativeCommonsAttribution4.0International(CCBY4.0)license,whichpermitsunrestricteduseanddistributionG.2095Page2SarmadShamsInstituteofBiomedicalEngineeringandTechnology,FacultyofBasicMedicalSciences,LiaquatUniversityofMedicalandHealthSciences,Jamshoro,76090,Pakistansarmad.shams@lumhs.edu.pkAbstract:Hearinglossaffectsover430millionpeopleglobally,withtheWorldHealthOrganizationprojectingthisfiguretoriseto700millionby2050.Despiteitsprevalence,accesstoaffordableandaccuratediagnostictoolsremainslimited,particularlyinlow-resourcesettings.Traditionalaudiometrysystemsrelyoncomplexhardwareandproprietarysoftware,limitingtheirscalabilityandadaptability.Thisdevicereimaginessuchsystemsbyutilizingopen-sourcetechnologiestocreateauser-friendlydevice.Thecoreproblemliesinbridgingthegapbetweenaffordabilityanddiagnosticaccuracywhileensuringcompliancewithinternationalaudiometricstandards.ThesolutionintegratesaRaspberryPiwithheadphonesandatouchscreeninterface,capableofperformingpure-toneaudiometryacrossfrequencies(125Hz–8kHz)atintensitiesupto120decibelHearingLevel.Keyfeaturesincludeautomatedthresholddetection,real-timeaudiogramvisualization,anddualoperationalmodes(manual/auto)toaccommodatediverseclinicalworkflows.Theautomodeusesadaptivealgorithmstoreducetestingtime,whilethemanualmodeallowscliniciansfinecontrolforunusualcases.TheproceduresGRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page3encompassediterativeprototyping,softwaredevelopmentfortonegenerationandresponselogging,andrigorousclinicalvalidation.Calibrationwasperformedusingareferencesoundlevelmeter,whileusabilitymetrics(e.g.,touchresponsiveness,testduration)werequantifiedthroughtimedtrials.Resultsdemonstratedameanthresholddeviationof±4decibelHearingLevelcomparedtothecommercialdevice.Testinginvolved49participants,includingcliniciansandpatients,toevaluateaccuracy,usability,andefficiency.Thisdeviceunderscorestheviabilityofopen-source,low-costsolutionsinbridginghealthcaredisparities,offeringascalablemodelforhearinglossdiagnosis.Keywords:Audiometrictesting,Digitalpuretoneaudiometer,Patientresponse,Raspberry-pi,Real-timerepresentation,UserinterfaceINTRODUCTION1Auditorylossisawidespreadhealthissueaffectingmillionsofpeopleacrosstheglobe.AccordingtotheWorldHealthOrganization,around1.5billionindividualscurrentlylivewithsomedegreeofAuditorylossandthisfigureisexpectedtorisetoover2.5billionby2050[1].Thisprogressingproblemcreateschallengesnotonlyforthosedirectlyimpactedbutalsoforsociety,asitcausesemotionalandfinancialdifficulties.Itisestimatedthatuntreatedhearingimpairmentsresultinglobalfinancialfatalitiesamountingtohundreds1GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page4ofbillionsofdollarseveryyear,includingcostsassociatedtolostproductivityandhealthcare.Thishighlightstheimportanceofearlydiagnosisandintrusiontodecreasethelong-termconsequencesofhearingloss.Oneofthemosteffectivemethodsaccessiblefordiagnosinghearinglossispure-toneaudiometry.Itisstaredasthegoldstandardforevaluatingaperson'ssensitivitytoinnumerablesoundfrequenciesandfiguringoutthelowermostdecibellevelstheycanperceive.Theinformationobtainedfrompuretoneaudiometryiscrucialforcreatingsuccessfulhearingtreatmentplansinadditiontodiagnosis.Forthosewhousehearingaids,audiogramsletaudiologistsadjustdevicestoeachperson'suniquehearingnecessities.Puretoneaudiometryisusedtoevaluateeligibilityandestablishexpectationsforpost-surgeryhearingoutcomesininstancesthatrequirecochlearimplants[2].Duetofinancialrestrictions,manyhealthcareamenitiesfinditdifficulttopurchasetherequiredtechnology,especiallythoseinunderservedorrurallocations.Thepublichealthproblemofuntreatedhearinglossmaydeteriorateasaresultofthisfinancialrestriction,whichmaypreventearlydetectionandcare[3].Forconventionalaudiometerstofunctionefficiently,specifictrainingisrepeatedlyneeded.Ifworkersarenotappropriatelyskilled,themultifariousnessoftestingproceduresandequipmentcalibrationmayresultininconsistentoutcomes.Duetotheneedforexperiencedstaff,audiometricevaluationscanonlybeachievedinalimitednumberoflocations,includingcommunityhealthcentresandothernon-specializedsettings[4].GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page5Inordertoimprovediagnosisaccuracyandproducefurtherpersonalizedtreatmentstrategies,theaudiometrydeviceandresultsfacilitatebyproductionofvitalinformationonthekindandseverityofhearinglossalongwithotherassociateddiseases,i.e,rheumatoidarthritis[5].Theaudiometerhelpswithconsistentaudiometricdatacollection,whichiscrucialforfiguringoutthepervasivenessandeffectsofhearingloss,inadditiontoitsdiagnosticbenefits.Publichealthdrivesandthedesignofplanstoimprovehearinghealthmorebroadlycanbothbenefitfromsuchdata[6].Byreassuringmorepeopletogetassessmentsandtakepreemptiveaction,itcanendorseimprovedauditoryhealthinvariouspopulations[7].TheprojectadvancesaudiologyandimprovesuserexperiencebyleveragingcomponentssuchastheRaspberryPiandIQAudioDAC(DigitaltoAnalogConverter).Thisaudiometer'sadaptabilitymakesitappropriateforuseinavarietyofsettings,suchascommunityhealthprograms,educationalinstitutions,andclinicalsettings,whichensuresthathearingassessmentscanbecarriedoutinavarietyofsettings,meetingthedemandsofvariouspopulations.Additionally,thissystemallowsefficientdatasharingandcommunication.Theaudiometer'soriginalfeaturescomplementthemostrecentdevelopmentsinmedicaltechnology.Furthermore,theprojectcanreducefinancialproblemthatuntreatedhearinglossplacesonhealthcaresystemstoassistearlyidentificationandinterference[8].GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page6In2018,aMATLAB-basedaudiometrysystemwasdeveloped,usingamodifiedHughson-Westlakeprocedureforefficaciousdetectionofhearingthresholds[9].Thisdesignfeaturedabi-auralaudiogramcomparatorwithaGUI(GraphicUserInterface)thatallowsacliniciantocomparebilateralaudiograms.In2020,asignificantleaptowardself-administeredhearingassessmentswasrepresentedbytheopen-sourcePythonaudiometer.ConstructedonaRaspberryPi3B+,thisdeviceautomatedtheHughson-Westlakeprotocol,allowinguserstoconductaudiometrictestsindependently[10].Theresultwasanaudiogram,inaformatthatshowedtheresultsoftheassessmentandallowedthekindofdatasortingandorganizingthatenhancedtheabilitytomakeuseoftheresults.Amodelwasintroducedin2020,offeringanarchitectureforMVVM-based(Model-view-viewmodelbased)hearingdiagnosisapplications.Themodularityindesignhelpedkeeptheappmanageable,providedameanstoapplyitspartselsewhere,andassistedinconceptualizingdatastandardscliniciansmightgraspinworkflowcontexts.Testingbyanotolaryngologistitdemonstratedheightenedefficiencyindiagnosticsbutrequiredconsiderablemedicalproficiencytotranslateitsresultsforthedeafandhardofhearing[11].Aworkin2022presentedanaudiogramdigitizationalgorithmforinsurance.Itclaimedadjudicationwith5dB(Decibel)accuracyinscannedreportthresholdextraction.Theopen-sourcesolutioncombinedcomputervisionwithJSON(JavaScriptObjectNotation)outputgeneration,minimizingadjudicationtimeviasemi-automateddataconversion[12].In2022,researchersusedmachinelearningtoidentifyauditorythresholdsbybuildingabinaryclassificationmodelusingSVMGRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page7(SupportVectorMachine),inwhich3kernlswereused.Theaudiogramsanddatawerecollectedthroughasmartphoneapplication,forsubjectsbetweentheagesof18to22years[13].In2023,wasconfirmedateleaudiologysystemwhichcomparedon-siteandremotepure-tonethresholdsin50participants.TheKUDUwaveaudiometerwith5Gconnectivityrevealed≤3dBdifferencesbetweentestconditions,provingsuitabilityforruraluse[14].The2023low-costaudiometerusedconsumergradematerialsandachieved±1%intensityerror[15].2024witnessedaninternet-basedhearingchecktoolforJapanesehealthexaminations.92%concordancewasevidentwithrespecttoclinicalaudiometry[16].Year2024developmentsinvolvedadecisiontreebasedhearinglossclassificationmobileaudiometryapp.Thehardwarecalibrated,crossplatformsolutionfeaturededucationalcontent,withclinical-gradefrequencyrangecoverage[17].In2025mobilephoneaudiometrystudyobtained90%accuracyatthresholdsgreaterthan40dBindetectingmildlossthroughadaptivestepsizealgorithms[18].MethodsandProceduresThemethodologyinvolvesthehardwareassembly,softwareconfigurationanddevelopmentofgraphicuserinterfacetoensuretheuserfriendlyaudiometry.Itincludesthesoftwareandhardwareintegration.ThisprototypeneedsthecomponentsofRaspberryPi3modelB,IQaudioDAC,patientresponsebutton,7inchHDMI(HighDefinitionMultimediaInterface)display,AudioGRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page8stereoplugadapter,TRRS(TipRingRingSleeve)stereobreakoutextensionboard,headphonesandanadapterforpowersupply.RaspberryPi,providesenoughcomputationalpowertoencouragetheaudiometrytesting.Theaudiologistwilldecidethetypeofaudiometrytobeperformed,i.e.,manualaudiometryandautoaudiometry.Thepatientistoweartheheadphonesandisgivenapatientresponsebutton,thentheaudiologistwillstarttheaudiometryprocess.TheIQaudioDACensuresthequalityoftheaudiooutputintheheadphonesbyefficientlyconvertingadigitalsignalintoananalogsignal.HDMItouchscreenprovidesauserfriendlyinterfacetotheaudiologistforselectionoftheaudiometrictestingparameters.Whenthepatientrespondspositivelythefurthertestingwillcontinue,andiftheyrespondnegatively,thentheaudiosignalthresholdgetsdisplayedontheaudiometer.TheprocessofthisaudiometryprocessisshowninFig.1.GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page9Fig.1.Flowchartofpuretoneaudiometryprocess.Thefinalaudiometryresultintheformofanaudiogramcanbedisplayedinthepdfformaswellupongenerationofareportbyanaudiologist.ThedigitalpuretoneaudiometerensuresaccomplishmentoftheguidelinesofWHOand12ASHA(AmericanSpeechLanguageHearingAssociation).A.HardwareInterfaceThehardwareofthesysteminterfaceswiththeapplication,whichiscontrolledbythecaretaker.Asingle-boardRaspberryPi3ModelBoperatesasthecoreprocessorunitthatrunseveryprogramwhilemanagingboththedeviceinterfaceanddataloggingandresponsecontrols.TheGPIO(GeneralPurposeInput/Output)headerstogetherwithUSB(UniversalserialBus)andHDMIGRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page10portsonthisdeviceenableuserstoeasilyconnectvariousperipheralcomponents.TheaudiooutputfunctionsoftheRaspberryPioperatethroughitsconnectiontoanIQaudioDACdevicewhichinterfaceswiththe40-pinGPIOheader.TheDACdevicereinforcestheRaspberryPi'sstandardsoundqualitytogenerateminimaldistortionstereoathighresolutionoutputsneededfordiagnostictestingprecision.AstereojackattheDACproducesanalogaudiosignalswhicharetransmittedtopatientearpiecespoweredbyP9ProMaxHeadphonesconfiguredwiththemainunit.Thesysteminteractionisequippedwitha7-inchHDMItouchscreendisplayforoperation.TheHDMIconnectorandUSBinterfaceenableconveniencesotheaudiologistcanoperatethesystemthroughitsgraphicaluserinterfacebyconnectingthedisplaytotheRaspberryPi.Usersofthisinterfacehavereal-timeaccessforadjustingtestparametersandinitiatingsessionsaswellasreviewingobtainedresults.Duringtestingthepatientreliesontheresponsebuttontoshowtheirperceptionofadetectedtone.ItisconnectedtoRaspberryPiGPIOpinsbytargetingadigitalinputpinand3.3V(VCC)orGNDbasedonpull-uporpull-downlogicconfiguration.GPIOmonitoringoperateswithinthesystemprogramtodetectbuttoneventssothesystemdeliverspreciserealtimeresponseevaluationduringtestingprocedures.Asystempowersupplycomesfroma5V/2.5AmicroUSBpoweradapterwhichprovidespowertoboththeRaspberryPianditsconnectedperipheralssimultaneously.Thesystem'sblockdiagramisdisplayedinFig.2.GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page11Fig.2.Blockdiagramofthesystem.B.SoftwareInterfaceSoftwaredevelopmentinmakingofthisaudiometrysystemisbasedonobject-orientedandmodularprogrammingtechniquesusingthePythonprogramminglanguageandrelatedlibraries.Sourcecodewasdividedintomany‘.py’modulestoenableseparationofconcerns,e.g.,onemodulecontrolledthemaininterface(audiometer_app.py),anotherthepatientdatainput(patient_data.py),andonefortonegeneration(sound_module.py).Helperfileslikestorageofaudiosamples,fontassets,backgroundgraphics,andPDF(PortableDocumentFormat)templateswereorganizedinanordereddirectorystructureforportabilityandeaseofmaintenance.TheAudiometerAppclassisresponsibleforeventdrivenreactiontouseractionscoordinatesplaybackoftonesbyfrequencyandvolumeselectionsandrefreshesthegraphicalaudiograminrealtime.ItkeepstheapplicationstateGRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page12intact,withearsideswitching,frequencyprogressions,andpatientresponsesrecordedaccordingly.Whenatonegenerationrequestisreceived,theSignalProcessingLayergeneratestherequestedsignal.ThisisaccomplishedviaasinewavegeneratoralgorithminEquation(1).(1)Wherefisthechosenfrequency,Aistheamplitude(adjustedaccordingtothechosendBlevel),andtisthetimevectorfortoneduration(typically1–2seconds).Upontriggeringatesttoneasinewaveoftheselectedparametersisgeneratedandplayedthroughtheaudiooutputchannel.Thetoneisthenplayedoutthroughthesystem'sdefaultsound(headphones)throughtheuseofthelibrary.VolumeisprogrammedtocorrespondtothechosendBlevel,adjustedthroughscalingthewaveformamplitude.Whenthetestiscomplete,theusermaygenerateareportconsistingoftheaudiograms,andpatientinformation.Fig.3showsthesystemaftertheintegrationofthehardwarecomponentsandsoftwarealgorithmsusedtomakethedigitalpuretoneaudiometer.Fig.3.Finallayoutofdesignedsystem.GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page13ResultsanddiscussionTheresultsandaccuracyofcalibrationoftheaudiometrysystemwereobtainedthroughacomparisonbetweenexpectedandactualvaluesfordecibels(dB).Thestudyinvolvedmeasuringerrormarginsintermsofamplitude(dB)tocheckthetechnicalcapabilityofthesystem.InordertoensuretheaccuracyofdBlevelsderived,soundlevelmeter(SLM)mobileapplicationwasused.Standardpuretones(e.g.,1kHztoat20to80dBHL)werepresentedandthenwereanalyzedbySLMapp.Error(dB)valuesarecalculatedforeachvalueusing(2).Theexperimentalobservationsandthecalculatederroraresummarizedin(2)TableI.Therelationshipisdefinedasfollows:"EdBisthecalculatederrorindecibels;Sexprepresentstheexpectedsoundpressurelevel;Smeasdenotesthemeasuredsoundpressurelevelrecordedbytheapplication.GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page14TABLEIOBSERVEDVALUESANDCALCULATEDERRORINDBFrequency(Hz)ExpecteddBMeasureddB(App)Error(dB)10002000500125400020304065701632375768+4.0-2+3.0+8.0+2.0Thismethodisreliantontheconstraintofaccuracyplacedonconsumer-decibelmeterapplications.Contrarytoprofessionalsoundlevelmeterscomplyingwithindustrystandardsofcalibration,mobileappsusedinthisexperimenttendtodisplayanerrortolerancebetween±2and±5dB.Thesedifferencesaretheresultofvarioussmartphonemicrophonecapacities,ambientnoises,andcapabilitylimitationsofmobiledigitalsignalprocessing.Therefore,whiletheapp'soutputisafairlycloseapproximationofrealsoundpressurelevels,itcannotbedependedonforclinicalorregulatory-qualityaccuracy.Clinicaltestingofthedevelopedaudiometersystemwascarriedouttovalidateitsperformancecharacteristicsinmedicalsettingsundercarefulsupervision.Testingthedeviceappealedtobothpatientsandvolunteersunderguidancetocompareitsfunctionalityversusstandardclinicalaudiometers.FromFebruaryGRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page1517th,2025toApril2nd,2025,audiometricrecordswerecollectedfrom49subjectsusingthissystem.Ofthesepatients,38.8%weremaleand61.2%werefemale.Theaverageagewas23.6years.Themeanhearinglevel(indecibels,dB)isreportedforfrequenciesof500Hz,1000Hz,2000Hzand4000Hz.Themeanhearinglevelforallpatientswas28.98dB(±24.1)intherightearand24.69dB(±24.1)intheleft.Usingthisaudiometrydevice,therawdatacanberetrievedandusedwithstatisticssoftware.Forexample,thedistributionofthemeanhearinglevelsatdifferentagegroupscanbecalculatedinashorttimetypicalofhearingdeclinecanbeobservedwithincreasingageoranothertrait.Measurementresultsenablebothvalidationofthedeviceperformancewhiledirectingtoenhancefunctionality.ThebarchartinFig.4compareshearinglossseveritybetweenrightandleftearsacross49individuals.Statisticalanalysisrevealsthat71.4%ofrightears(35patients)exhibitmildhearingloss(21-40dB),whileleftearsshowahigherproportionofslightloss(30.6%,15patients).Therightear’shigherseveritysuggestspotentialasymmetricnoiseexposureorphysiologicaldominance,asobservedinoccupationalhearingdamage.Only1patient(2%)reachedmoderatelyseverelossintherightear,indicatingmostcasesaremild.GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page16Fig.4.Rightearsshowhigherratesofmildimpairment(71.4%)comparedtoleftears(57.1%)TheaudiometricresultsshownachartinFig.5stratifieshearinglossbygender,revealing61.2%ofpatientsarewomen(30/49),butmendominatemoderatecases(e.g.,4/5moderateright-earcases).Womenclusterinslight/mildcategories(e.g.,12/15slightleft-earcases),possiblyduetolowernoiseexposureorhormonalprotectiveeffects.Men’shighermoderaterates(e.g.,60dBrightear)alignwithstudieslinkingmaleoccupationstonoise-inducedloss.Thesubjectsunder20exhibitnormal/slightloss(e.g.,11/23cases),while40+grouphas5/12inmoderate+.The30–40bracketmarksthetransition,with4/16patientsshowingmoderate+loss,suggestingpresbycusisonset.GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page17Fig.5.Womencomprise61.2%ofcasesbutdominatemildercategories(80%ofslightlosses)Theaudiogramsofdevelopedsystemandaclinicaldevicewerecompared,bysubjectinganindividualtoaudiometryfrombothdevices.MentionedinFig.6andFig.7isthecomparisonbetweenaudiogramsofthisdevelopeddeviceandthatofaclinicalaudiometer,namelyAmplivox(Model270).GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page18Fig.7.Audiogramobtainedviathedevelopedsystemshowsthresholdsforthesamesubject,demonstratingdiagnosticgradeaccuracybyshowingstrongagreement(<5dBdifference)withclinicalaudiometerFig.6.Pure-toneaudiogramfromclinicalaudiometer(Amplivox270)showingthresholdsatstandardfrequencies.Circlesforrightear(leftplot)andcrossesforleftear(rightplot)indicateairconduction.GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page19Thisdirectsubjectspecificvalidationdemonstratesthefunctionalaccuracyofthedevelopedsystemrelativetostandardclinicalresultsthisanalysisconfirmsconsistencyandreliability.Thedevicealsounderwentclinicalevaluationbyalicensedpractitionertovalidateitsperformanceinpreliminaryhearingassessments.Theevaluationconfirmedthatthedeviceoperatessatisfactorilyforairconductiontestingincontrolledclinicalenvironments,meetingstandardsofaccuracy,safetyandusabilitywithinitsintendedscope.Theanalysisoftheaudiometrysystemuncoveredvariousaspectsespeciallyexperimentalresultsthatvariedfrompredictedvalues.ThedBlevelaccuracyvariationswerenotedduringcalibrationtesting,whenthesystem'soutputwascomparedtoreferencemeasurements,withmostdiscrepanciesarisingwithina±3dBrangeforthemajorityoffrequencies.Thesevariationsweremostsignificantatfarendsofthefrequencyrange(125Hzand8kHz).Relativeerrorpercentagesdeterminedovertestfrequenciesaveraged2.8%,marginallyabovethedesiredthresholdof2%,indicatedpotentialforenhancementinsignalgenerationaccuracy.Frequencyaccuracyheldsteadyat±1.2%ofintendedvalues,althoughintermittentanomaliescroppedupinsimultaneousmultifrequencytesting,presumablyfromallocationofprocessingresourceswithintheaudiogenerationsubsystem.Sometestcasesexhibitedsignificantdeparturesfrompredictedresultsthatareworthyofspecialconsideration.On12%ofautomodethresholddetection,thealgorithmdetectedthresholds5-10GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page20dBgreaterthanthoseinmanualmodeforidenticalsubjects,especiallyat4kHzfrequencies.Thisdifferenceseemedassociatedwiththesystem'sconservativemethodofincrementingamplitudewhentherewasnoresponse,tendingtooverestimatetheactualthresholdofthedigitalpuretoneaudiometer.ConclusionThedesignedaudiometrysystemiseffectivetogethearingthresholdandthroughitsdualmodesitachievesautomaticfrequencyprogressionthroughitssystemdesigntoprovideefficienttestingandmaintainuniformtestresultswhileshorteningtheevaluationduration.Thecombinationofautomaticdatapresentationwithresultingoutputsdisplayedasgraphsallowsthepatientandcliniciantoquicklyunderstandevaluationdatabetter.Thisaudiometersupportsbettertreatmentstandardsduringhearingtestsbygettingridoftheproblemsandvariationsoftraditionalanaloginstruments.Providesreal-timegraphicalrepresentationsofairconductiontestresultswhichincreasesclinicalinformationsharingduringdiagnosis.Thisvisualfeedbackpre-sentintheaudiometerenablesinstantcommunicationbetweenclinicianandpatientabouttheirhearingabilities.Clearandeasytoreadresultpresentationhelpsclinicalpractitionersmakebetterdecisionsintheirwork.Thedesignedaudiometerbringsbothaffordableoperationandcomprehensivefunctionalitytoofferbetteraccessforhealthcareprovidersandtheirpatientpopulationsduringadvancedhearingtests.GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page21FutureworkTherearesomeideastomakeitmoreuseful.Byexpandingitsfunctionalitythroughadditionaltestingfeaturesthatincludespeechaudiometryandextendedfrequencyrangetesting.Theseinclusiontestswillgiveprofessionalstheabilitytoexaminevariousaspectsofapatient'shearingabilitiesforcomprehensivediagnosis.TheapplicationandintegrationofAI(ArtificialIntelligence)featuresshallenablepredictionsofhearinglossadvancementthroughevaluationdataandmedicalindicatorsfordeliveringenhancedtargetedpatientcare.Teleaudiometrycanalsoprovetobeconvenient.Throughthedeploymentofmobileapplication,individualswillgaintheabilitytoscheduletests,tracktheirprogress,viewtheirresultsingraphicalform,storehistoricaldataforfuturereferenceandconnectwithexpertsfromadistance.REFERENCES[1]W.H.Organization,WorldReportonHearing.Geneva,Switzerland:WHO,2021,ISBN:978-92-4-002049-8.[Online].Available:www.who.int/publications/i/item/world-report-on-hearing.[Accessed:Aug.17,2024].[2][3]A.C.Carl,M.H.Hohman,andJ.Cornejo,"AudiologyPureToneEvaluation,"inStatPearls[Online].TreasureIsland(FL):StatPearlsPublishing;2023Jan.Available:(www.ncbi.nlm.nih.gov/books/NBK580531).Jayawardena,Asitha&Waller,Bianca&Edwards,Bruce&Larsen-Reindorf,R&Anomah,Joyce&Frimpong,B&Gina,Ayanda&Netterville,James&Saunders,J&Basura,Gregory,“Portableaudiometricscreeningplatformsusedinlow-resourcesettings:Areview”,TheJournalofLaryngology&Otology,vol.doi:10.1017/S0022215118001925.2018,133,1-6,pp.GRJNST,Volume:04-Issue3(2026)/ISSNP:2790-7643ArticleID:2095https://doi.org/10.53762/grjnst.04.03.16G.2095Page22[4]M.F.Bhutta,X.Bu,P.C.deMuñoz,S.Garg,andK.Kong,"Trainingforhearingcareproviders,"BullWorldHealthOrgan,vol.97,no.10,pp.691–698,2019,doi:10.2471/BLT.18.224659.[5]HyeminJeong,Young-SooChang,SunYoungBaek,SeonWooKim,YeongHeeEun,InYoungKim,JaejoonLee,Eun-MiKoh,Hoon-SukCha,“Evaluationofaudiometrictestresultstodeterminehearingimpairmentinpatientswithrheumatoidarthritis:AnalysisofdatafromtheKoreanNationalHealthandNutritionExaminationSurvey,”PLoSONE,vol.11,no.10,p.e0164591,2016,doi:10.1371/journal.pone.0164591.[6]MandyK.Salmon,JasonBrant,MarcH.Hohman,DanielleLeibowitz,"AudiogramInterpretation,"inStatPearls[Online].TreasureIsland,FL:StatPearlsPublishing,2025Jan.Available:(www.ncbi.nlm.nih.gov/books/NBK578179).[7]K.Cienkowski,D.Culbertson,K.Dowd,W.Kaf,A.K.Me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