1 THE AUDIOMETER

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and. . TEST ENVIRONMENT. HEARING CONSERVATION . PROGRAM. 28 Jan 2013. Learning Objectives. Describe the critical components of the audiology test environment. Identify the equipment required for audiology testing. ID: 407550 Download Presentation

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1 THE AUDIOMETER




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THE AUDIOMETER and TEST ENVIRONMENT

HEARING CONSERVATION PROGRAM

28 Jan 2013

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Learning Objectives

Describe the critical components of the audiology test environmentIdentify the equipment required for audiology testingExplain required audiometer calibration and equipment checksList infection control proceduresTroubleshoot temporary and permanent equipment problems

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FOUNDATION of Accurate and Valid Hearing Tests is the1. Test Environment 2. Test Equipment

Test Environment

Test Equipment

Hearing

Test

Results

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Equipment Used for Testing

Test boothAudiometerComputer and data management software – DOEHRS-HCHeadphones/earphonesHand switch or response buttonArtificial (electroacoustic) ear -- “Bio-Joe” --or human listener with normal hearing

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Audiometric Sound Booths

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Sound Booths Sound treated Nearly Sound Proof

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Audiometric Booth Certification

Required annually Performed by Industrial Hygienist or Audiologist or trained technician Decibel (dB) Levels inside & outside booth pierside & underway Displayed clearly

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Excessive Noise in Booth

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Excessive Noise Solutions

Repair and/or replace equipmentPatients remove jackets, electronic devicesOHC Technicians control talking and noise in test areaChange testing schedule due to interference from exterior noiseRelocate test booth

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What is an Audiometer?

Electronic instrumentMeasures hearing sensitivityGenerates pure tone signals of known frequency and intensity

Manual

Audiometer

MicroprocessorAudiometer

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GSI 61 Audiometer

Benson Medical Inc

CCA-200 mini

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Audiometers Used byOHC Technician

MICROPROCESSORSoftware controls testingPatient controls stimulusTests 1-8 patientsAutomatic STS calculations

MANUALExaminer controls testingExaminer controls stimulusTests 1 patientManual calculations of STS

Continued….

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MICROPROCESSOR Prints forms : 2215, 2216, Non HC, 2217 Data uploaded to central data repository Semi-manual capability Requires maintenance, software upgrades, data backup, calibration

MANUALManual audiograms Data transcribed into computer database before upload Manually operated Requires maintenance and calibration

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Three Coordinated SystemsTesting - Storing - Collecting

Defense Occupational & Environmental Health Readiness System -- Hearing Conservation or Data Repository

DOEHRS-HCHearing ConservationCOLLECTS demographic and hearing test data(1-8 patients)

DOEHRS-DRDataRepositorySTORESdemographic & hearing data worldwide

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CCA-200Microprocessor Audiometer PERFORMS hearing test RETRIEVES data from DOEHRS-HC

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Other System Components

Electroacoustic Simulator (“Bio-Joe”)Verifies calibration status of audiometerAttached to audiometer for Biological Calibration checkHeadphones or EarphonesCalibrated with an audiometer as unitSwapping headphones changes calibrationMust be repaired togetherHand switch

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Testing Equipment Checks

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Functional Listening Check

Daily hands-on check of hardwareVisually check equipment earphone headband tension earphone cushions and diaphragms cords, connections and response buttonListen to pure tones through headphones frequency and intensity changes tone quality crosstalk and static

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Daily Biologic Calibration Check

Verifies calibration values of audiometer (Day 2-365) have not changed significantly from (Day 1) baseline Performed daily before first employee is testedBio-Joe should be used as primary calibrator normal hearing listener acceptable; as secondaryBio-Joe thresholds range from 60 - 80 dBHLPermitted deviations from initial baseline values ± 5 dB at 500-4000 Hz ± 10 dB at 6000 HzDD 2217 form established as legal record; maintained for 5 years

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Daily Biologic Calibration Check #2

If audiometer fails calibration check all connections check placement & condition of earphones repeat calibration checkUse alternate listener if problem persistsIf audiometer fails calibration with 2nd listener send out for repair (with earphones) use backup audiometer if available

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Causes for Failed Calibration Check

Improper earphone placementPoor connections at jack panel or to audiometerWorn out or flattened earphonesAnnual electroacoustic calibration expiredMalfunctioning artificial ear (Bio-Joe)Malfunctioning audiometer

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Audiometer Care andEnd of Day Procedures

Clean earphones & cords (if not done in a.m.)Hang earphones on hook – NOT on Bio-JoeBack up audiometric data on external driveExport audiometric data to DOEHRS-DR dailyCompletely shut down system to prevent data corruption (before CAC removal)Store or dispose of employee data re: HIPAA regulations

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Infection Control Procedures

Objects touch . . . blood, mucous, ear drainage, cerumen, other bodily fluidsClean and sterilize after each useProbe tips for tympanometry Otoscope speculae (non-disposable)Ear gauges

Critical Equipment

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IF

THEN

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Infection Control Procedures …

Non-Critical Equipment

Clean and Disinfect disposable germicidal pre-moistened wipeshospital grade disinfectantHeadphonesHeadbandsResponse buttonsEnvironmental surfaces

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SUMMARY

FOUNDATION of Accurate Valid Hearing Tests Quiet Environment Calibrated WorkingEquipment

Equipment

Test Environment

Hearing Test

Results

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QUESTIONS?

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