1 THE AUDIOMETER and TEST ENVIRONMENT

1 THE AUDIOMETER  and   TEST ENVIRONMENT 1 THE AUDIOMETER  and   TEST ENVIRONMENT - Start

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HEARING CONSERVATION . PROGRAM. 28 Jan 2013. Learning Objectives. Describe the critical components of the audiology test environment. Identify the equipment required for audiology testing. Explain required audiometer calibration and equipment checks. ID: 673456 Download Presentation

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1 THE AUDIOMETER and TEST ENVIRONMENT




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Slide1

1

THE AUDIOMETER and TEST ENVIRONMENT

HEARING CONSERVATION PROGRAM

28 Jan 2013

Slide2

Learning Objectives

Describe the critical components of the audiology test environment

Identify the equipment required for audiology testingExplain required audiometer calibration and equipment checks

List infection control proceduresTroubleshoot temporary and permanent equipment problems

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Slide3

3

FOUNDATION of Accurate and

Valid Hearing Tests

is the1. Test Environment

2. Test Equipment

Test Environment

Test Equipment

Hearing

Test

Results

Slide4

Equipment Used for Testing

Test boothAudiometer

Computer and data management software – DOEHRS-HC

Headphones/earphonesHand switch or response button

Artificial (electroacoustic) ear -- “Bio-Joe” --

or human listener with normal hearing4

Slide5

Audiometric Sound Booths

5Sound Booths Sound treated

Nearly Sound Proof

Slide6

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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Slide7

Excessive Noise in Booth

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Slide8

Excessive Noise Solutions

Repair and/or replace equipmentPatients remove jackets, electronic devices

OHC Technicians control talking and noise in test area

Change testing schedule due to

interference from exterior noise

Relocate test booth

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Slide9

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

Slide10

Audiometers Used by

OHC TechnicianMICROPROCESSOR

Software controls testingPatient controls stimulus

Tests 1-8 patientsAutomatic STS calculations

MANUAL

Examiner controls testing

Examiner controls stimulus

Tests 1 patient

Manual calculations of STS

Continued….

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Slide11

MICROPROCESSOR

Prints forms : 2215, 2216, Non HC, 2217 Data uploaded to central data repository

Semi-manual capability

Requires maintenance, software upgrades, data backup, calibration

MANUAL

Manual audiograms

Data transcribed into computer database before upload

Manually operated

Requires maintenance and calibration

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Slide12

Three Coordinated Systems

Testing - Storing - Collecting

Defense Occupational & E

nvironmental H

ealth Readiness S

ystem -- Hearing

C

onservation or

D

ata

R

epository

DOEHRS-HC

Hearing

Conservation

COLLECTS

demographic

and hearing test data

(1-8 patients)

DOEHRS-DR

Data

Repository

STORES

demographic & hearing data worldwide

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CCA-200

Microprocessor Audiometer

PERFORMS

hearing test

RETRIEVES

data from

DOEHRS-HC

Slide13

Other System Components

Electroacoustic Simulator (“Bio-Joe”)Verifies calibration status of audiometer

Attached to audiometer for Biological Calibration check

Headphones or Earphones

Calibrated with an audiometer as unitSwapping headphones changes calibration

Must be repaired together

Hand switch

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Slide14

Testing

Equipment Checks14

Slide15

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Slide16

Functional Listening Check

Daily hands-on check of hardware

Visually check equipment

earphone headband tension

earphone cushions and diaphragms cords, connections and response button

Listen to pure tones through headphones

frequency and intensity changes

tone quality

crosstalk and static

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Slide17

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 tested

Bio-Joe should be used as primary calibrator normal hearing listener acceptable; as secondary

Bio-Joe thresholds range from 60 - 80 dBHL

Permitted deviations from initial baseline values

± 5 dB at 500-4000 Hz

± 10 dB at 6000 Hz

DD 2217 form established as legal record;

maintained for 5 years

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Slide18

Daily Biologic Calibration Check #2

If audiometer fails calibration

check all connections check placement & condition of earphones repeat calibration check

Use alternate listener if problem persists

If audiometer fails calibration with 2nd listener

send out for repair (with earphones) use backup audiometer if available

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Slide19

Causes for

Failed Calibration CheckImproper earphone placement

Poor connections at jack panel or to audiometerWorn out or flattened earphones

Annual electroacoustic calibration expired

Malfunctioning artificial ear (Bio-Joe)Malfunctioning audiometer

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Slide20

Audiometer Care and

End of Day ProceduresClean earphones & cords

(if not done in a.m.)Hang earphones on hook – NOT on Bio-Joe

Back up

audiometric data on external driveExport audiometric data to DOEHRS-DR daily

Completely shut down system to prevent

data corruption

(before CAC removal)

Store or dispose of employee data

re: HIPAA regulations

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Slide21

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

Slide22

Infection Control Procedures …

Non-Critical EquipmentClean and Disinfect

disposable germicidal pre-moistened wipeshospital grade disinfectant

HeadphonesHeadbands

Response buttonsEnvironmental surfaces

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Slide23

SUMMARY

FOUNDATION of Accurate Valid

Hearing Tests Quiet Environment

Calibrated Working

Equipment

Equipment

Test Environment

Hearing Test

Results

23

Slide24

QUESTIONS?

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