1

Hearing Aids and Assistive Hearing Aids and Assistive Listening DevicesListening Devices

Audiological RehabilitationAudiological Rehabilitation

Three Goals of Hearing Aid Three Goals of Hearing Aid FittingFitting

Increase strength of _________ to Increase strength of _________ to make it audiblemake it audibleShape the signal to match the Shape the signal to match the ________________________Protect the ear from ___________ Protect the ear from ___________ loudness and from further damageloudness and from further damage

2

Basic Components of a Basic Components of a Hearing AidHearing Aid

A.A.B.B.C.C.D.D.E.E.F.F.G.G.H.H.

Two Major Ways to Two Major Ways to Categorize a Hearing AidCategorize a Hearing Aid

______ of hearing aid ______ of hearing aid –– what it looks what it looks like.like.

____________ features ____________ features –– How it How it works (the guts)works (the guts)

3

Hearing Aid StylesHearing Aid Styles

Body AidBody AidEyeglass AidEyeglass Aid_____ Conduction HA_____ Conduction HAB.T.E. Hearing AidB.T.E. Hearing Aid_____ Hearing Aid_____ Hearing AidI.T.C. Hearing AidI.T.C. Hearing Aid_____ Hearing Aid_____ Hearing Aid

Body AidBody Aid

Consists of box worn on the Consists of box worn on the torso, which holds the torso, which holds the microphone and amplifier, microphone and amplifier, and long cords that lead to and long cords that lead to the individualthe individual’’s ears earGood for ________ hearing Good for ________ hearing losses, B/C hearing aids, and losses, B/C hearing aids, and manual dexterity issues. manual dexterity issues. Also, very _______Also, very _______Not often usedNot often used

4

Eyeglass Hearing AidsEyeglass Hearing Aids

_______ used today_______ used todayComponents are housed in the temple of Components are housed in the temple of the _______the _______Numerous disadvantagesNumerous disadvantages

Bone Conduction HABone Conduction HAUsed for persons Used for persons with _______ or with _______ or _______ HL_______ HLHeadband can be Headband can be uncomfortableuncomfortableCan amplify up to Can amplify up to ~___ dB without ~___ dB without distortiondistortionNew surgically New surgically implantable BC implantable BC devicedevice

________________________________

5

BTE Hearing AidsBTE Hearing AidsMost _______ of hearing Most _______ of hearing aid stylesaid stylesLess ________ issuesLess ________ issuesFewer repair problemsFewer repair problemsEasy to cleanEasy to cleanGood for ________ ear Good for ________ ear canals (i.e. canals (i.e. -- kids)kids)DAI capabilities andDAI capabilities andbetter tbetter t--coilcoilGood for those who Good for those who cannot have cannot have ____________________________________

The EarmoldThe Earmold

____ ear____ ear

Custom made Custom made Exact copy of ear Exact copy of ear __________________Can be used to Can be used to modify acoustic modify acoustic ______________Recreational usesRecreational uses

6

ITE and ITC Hearing AidsITE and ITC Hearing AidsITE ITE -- Completely fills Completely fills the external earthe external earITC ITC -- Fills less of the Fills less of the ________________All the basic _________ All the basic _________ encased within hearing encased within hearing aid casingaid casingMore cosmetically More cosmetically appealingappealing______ expensive______ expensive______ flexible ______ flexible

CIC Hearing AidsCIC Hearing AidsSmallest of the hearing Smallest of the hearing aid stylesaid stylesUsually also the most Usually also the most ________ of the styles ________ of the styles tootooFit completely within the Fit completely within the _________ and does not _________ and does not enter the enter the conchaconchaA small cord is attached A small cord is attached to the aid to help in to the aid to help in removalremoval

7

Advantages of CIC Hearing AidsAdvantages of CIC Hearing Aids______ feedback______ feedbackImproved sound ___________Improved sound ___________Less gain neededLess gain neededLess _____ noise problemsLess _____ noise problemsEnhanced telephone useEnhanced telephone useMore ________________More ________________

Hearing Aid TechnologyHearing Aid Technology

Disposable and instant fit hearing aidsDisposable and instant fit hearing aids__________ hearing aids__________ hearing aidsProgrammable hearing aidsProgrammable hearing aids________ hearing aids________ hearing aidsAdditional FeaturesAdditional FeaturesMultiple microphonesMultiple microphones

8

Disposable Hearing AidsDisposable Hearing AidsSignificantly reduced Significantly reduced in price compared to in price compared to customcustom--made made productsproductsAppropriate for Appropriate for ______ losses______ lossesNo need to replace No need to replace batteries (complete batteries (complete aid replaced after ___ aid replaced after ___ days)days)Songbird is no longer Songbird is no longer in businessin business

Conventional Hearing AidsConventional Hearing Aids

Least technologically sophisticated of the Least technologically sophisticated of the customcustom--made productsmade products_______ hearing aid_______ hearing aidOnly minor changes are possible via _________Only minor changes are possible via _________Typically _______ amplification, but may have Typically _______ amplification, but may have some form of compressionsome form of compression

9

Programmable Hearing AidsProgrammable Hearing Aids

Increased flexibility and Increased flexibility and options for the weareroptions for the wearerMay be modified via a May be modified via a ________ or hand________ or hand--held held programmerprogrammerMay have multiple May have multiple __________________Programs accessible via Programs accessible via remote or switch on the remote or switch on the hearing aidhearing aid

Digital Hearing AidsDigital Hearing Aids

Processes the signal differently than Processes the signal differently than analog devicesanalog devicesConverts acoustic signal to _________, Converts acoustic signal to _________, which helps reduce introduction of which helps reduce introduction of ____________________May also have multiple ________ and be May also have multiple ________ and be modified via a computermodified via a computer

10

Advantages of Digital Hearing Advantages of Digital Hearing AidsAids

Flexibility in shaping ______________ of Flexibility in shaping ______________ of hearing aidhearing aidFeedback suppressionFeedback suppressionImproved sound qualityImproved sound qualityDecreased ____________Decreased ____________Less _______ noiseLess _______ noise

Multiple MicrophonesMultiple Microphones

______________ microphone______________ microphone

______________ microphone______________ microphone

11

Monaural Vs. Binaural Monaural Vs. Binaural AmplificationAmplification

With two hearing aids, you get:With two hearing aids, you get:Improved ______, especially in noiseImproved ______, especially in noiseImproved localizationImproved localization_________ hearing_________ hearingNeed for less gainNeed for less gainEliminate __________ effectEliminate __________ effectIncreased perception of high frequency Increased perception of high frequency ______________________

Hearing Aid SelectionHearing Aid Selection

Patient factorsPatient factorsDegree of HLDegree of HL____________________CostCost____________________VisionVision

SelfSelf--Assessment InventoriesAssessment Inventories

___________ Formula___________ Formula

12

Assessment of Hearing Aid Assessment of Hearing Aid OutcomesOutcomes

Electroacoustic ___________Electroacoustic ___________

Functional Gain MeasuresFunctional Gain Measures

_________ Measures_________ Measures

SelfSelf--Assessment InventoriesAssessment Inventories

Electroacoustic AnalysisElectroacoustic Analysis

Used to assess gain, Used to assess gain, _________ output _________ output frequency response frequency response of the hearing aid, as of the hearing aid, as well as ________ and well as ________ and battery drainbattery drainDone on a _____ Done on a _____ couplercouplerCompare to Compare to manufacturer manufacturer specificationsspecifications

13

Functional Gain MeasuresFunctional Gain Measures

Done in the sound boothDone in the sound boothDifference between individualDifference between individual’’s _____ s _____ and ________ hearing thresholdsand ________ hearing thresholdsConducted with warble tones or Conducted with warble tones or ________________________

Limitations of Functional GainLimitations of Functional Gain

______ reliability______ reliabilityLimited frequency informationLimited frequency informationNo maximum output informationNo maximum output informationDepends on patient __________ Depends on patient __________ responsesresponses

14

RealReal--Ear MeasuresEar Measures

Probe microphone in ear canal Probe microphone in ear canal measures the sound pressure at the measures the sound pressure at the ____________________Measurements are made with and Measurements are made with and without the _________ in placewithout the _________ in place

Benefits of RealBenefits of Real--EarEar

Takes into account differences of Takes into account differences of __________Looks at whole amplifying systemLooks at whole amplifying systemMaximum output information Maximum output information availableavailableMore ______ _______ informationMore ______ _______ informationNot as dependent on the patientNot as dependent on the patient

15

SelfSelf--Assessment InventoriesAssessment Inventories

HHIE or HHIAHHIE or HHIA__________APHABAPHAB

Pediatric Hearing Aid IssuesPediatric Hearing Aid Issues

_____ is best hearing aid style_____ is best hearing aid styleDAI, telecoil, microphone/telecoil DAI, telecoil, microphone/telecoil optionsoptionsTamper resistant controls and battery Tamper resistant controls and battery doordoorBenefits of _______ hearing aidsBenefits of _______ hearing aidsLoss and damage warrantyLoss and damage warrantyFitting issues (_____)Fitting issues (_____)

16

Hearing Aid Orientation (HAO)Hearing Aid Orientation (HAO)ChildrenChildren

Mainly aimed at parentsMainly aimed at parents

What to expect:What to expect:What can child perceive?What can child perceive?Limitations?Limitations?Avoid _________ languageAvoid _________ language

HAO HAO -- ChildrenChildren

How to care for hearing aids:How to care for hearing aids:Daily listening checksDaily listening checksReplace ________Replace ________MaintenanceMaintenance

How to help child get used to aids How to help child get used to aids --__________________

17

HAO HAO -- ChildrenChildren

How to work with child (_________ How to work with child (_________ Training)Training)

How to monitor childHow to monitor child’’s performances performance

Hearing Aid CheckHearing Aid Check

LookLookListen (___ sound test with hearing Listen (___ sound test with hearing aid stethoscope)aid stethoscope)Child listensChild listens

18

Assistive DevicesAssistive Devices

Altering/Warning DevicesAltering/Warning DevicesTelecommunication DevicesTelecommunication Devices________ Listening Devices________ Listening Devices

Alerting/Warning DevicesAlerting/Warning Devices

Alarm clocksAlarm clocksSignalersSignalers

TelephoneTelephone____________________Baby cryingBaby crying____________________Motion detectorsMotion detectors

Hearing DogsHearing DogsBlinker BuddyBlinker Buddy

19

Telecommunication DevicesTelecommunication Devices

Amplified StethoscopeAmplified StethoscopeAmplified ________Amplified ________TTYsTTYsVCO VCO

ALDsALDs

WirelessWireless________InfraredInfraredInduction Induction LoopLoop

HardwiredHardwired