CD443- Test 2
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This 5 page Study Guide was uploaded by Leah Larabee on Tuesday January 20, 2015. The Study Guide belongs to CD 443 at University of Alabama - Tuscaloosa taught by Dr. Hay-McCutcheon in Fall2014. Since its upload, it has received 301 views.
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Date Created: 01/20/15
CD 443 Test 2 Study Guide Screening Who can screen SLP s can screen 3 years adults AuD s can screen any age Procedures Newborn to 6 months ABR andor OAEs 7 months to 5 years behavioral testing Adults behavioral testing Puretone hearing screenings 7 months and older Kids usually started at 20 dB HL Adults usually started at 25 dB HL Frequencies 1000 2000 4000 Hz If they hear ALL they pass If they miss ANY they fail When to screen Infantswithin 3 months of birth or anytime parents are concerned Preschool when they start school Adults every 10 years until age 50 then every 3 after that Audiometry Audiometer Parts 1 Pure tone generator oscillator frequencies 2 Attenuator controls intensity of signal 3 lnterrupter switchduration of signal button that presents signal 4 Output transducer headphones Audiometry assessing hearing ability sensitivity ability to understand speech 0 Testing environment main consideration is minimizing background noise Three ways to reduce noise earphones insert earphones sound booths Measuring Thresholds 0 Clinical threshold de nition the lowest level at which patient correctly responds 50 of the time 0 Test better ear rst Puretone threshold procedure start at 30 dB go down 10 dB when they respond and up 5db when they don t Audiogram symbols Al BC mastoid i Unmasked i Unmasked Right C3 rights 39 LEW X I left 39l Masked J Masked I El 7 I left I Masking Crossover or crosshearing when sound presented in a hearing test is hear by the nontest ear 0 Air conduction testing can stimulate if loud enough 0 Bone conduction testing vibration always stimulates both cochleas lnteraural attenuation the loss of sound energy in decibels that occurs when a sound crosses from the test ear to the nontest ear 0 Supraaural headphones 40 dB 0 Insert earphones up to 70 dB or more 0 Bone conduction none 0 dB Masking a change increase in the threshold of audibility for one sound caused by the presence of another sound When to mask when such an intense signal is presented and heard in the nontest ear masking is done so that the signal is only heard in the test ear Rules 0 Rule 1 Air conduction difference in thresholds is 40 dB or more 0 Rule 2 Bone conduction unmasked bone conduction threshold is greater than the air conduction threshold by 15 dB or more Overmasking the masking noise presented in the nontest ear is heard in the test ear Audiodram Basics Degree 0 Normal less than or equal to 20 dB HL 0 Mild 2140 dB HL 0 Moderate 4155 dB HL o Moderately Severe 5670 dB HL 0 Severe 7190 dB HL 0 Profound greater than 90 dB HL 0 Con guration 0 Flat 0 Sloping worse in higher frequencies 0 Rising worse in lower frequencies 0 Steeply Sloping normal to profound 0 Cookie Bite shaped like a quotuquot 0 Corner profound bilateral hearing 0 Conductive AC thresholds loss BC thresholds WNL within normal limits AC BC air bone gap 0 Sensorineural AC thresholds loss 0 BC thresholds loss 0 NO air bone gap 0 AC thresholds loss 0 BC thresholds loss 0 Air bone gap Difference between mixed and conductive is that conductive BC is in normal range and mixed is not Sensorineural BC has no air bone gap and is in similar spot on audiogram as AC 0 Which Ear 0 Right earrefer to chart above 0 Left ear Puretone Average 0 Three Frequency PTA average thresholds at 500 1000 2000 Hz 0 Used for at audiograms Two Frequency PTA PTA2 average of best 2 thresholds at 500 1000 2000 Hz 0 Used for rising sloping and steeply sloping audiograms Speech Detection Threshold 0 De nition the lowest level at which a clientpatient can detect speech at least 50 of the time 0 Typically used with young children or people with profound hearing losses Speech Reception Threshold 0 De nition the lowest level at which a clientpatient can barely understand speech at least 50 of the time 0 Materials Spondee 2 syllable words with equal stress on each syllable Suprathreshold Tests 0 Other names speech recognition speech discrimination word recognition Signaltonoise ratio difference in intensity between the signal and the noise Closedset tests the patient must chose the correct response from a group of wordssentencespictures o Modi ed Rhyme Test MRT 0 California Consonant Test CCT o City University of New York CUNY o Nonsense Syllable Test NST Openset tests the patient may select an answer from an in nite number of possible utterances o CNCNU6 o Phonetically Balanced Kindergarten Test PBK LNTMLNT SPIN HINT CID Everyday Sentences SIN Acoustic Re ex Both muscles stiffen the ossicular chain which changes the transmission of sound through the middle ear Primarily reduces low frequency transmission Contraction of the stapedius muscle in response to intense sound 0 Re ex is bilateral o Occurs in both ears in response to sound in either ear Stimulus ear where sound is being presented 0 Sound pass from the outer ear through middle ear to cochlea o Nerve impulses are carried along the auditory nerve to the cochlear nucleus and then to the superior olivary complex Ipsilateral acoustic re exes measuring probe and stimulus are in the same ear 0 Right ipsi Stim R Probe R 0 Left ipsi Stim L Probe L Contralateral acoustic re exes measuring probe and stimulus are in opposite ears 0 Right contra Stim R Probe L 0 Left contra Stim L Probe R Acoustic re ect threshold lowest level at which the acoustic re ex occurs at least 50 of the times 0 Normal acoustic re ex thresholds are 7090 dB SL 85100 dB SPL Present normal Absent moderate to moderately severe Elevated mild Reduced sensation levels cochlear loss U i answertau u h I i TEE SE21 lF ElL l E H Ll quotIquot 9 391 39I39aquot quot39 39 Sugan r 13 E D Emigrant I39an39 39 15 39 l l39a39 u39i l l tlTl ta L uR L39 ll39e39 39 39 V 4 r I I I Jar If rmmttuex39 quotz fhti FilTll39r39q39i t f rr quotat complex ill I a I I A dis Lyon7quot J In 77E r H1 F39ll r Ja Hfr I 5 Mi quot xviEwim r I quotif l n39 nil EH 51 v39 Weariu J4 35 I if 391 V quot Hw L H r n r r quotl I i serum E w FEEMI ii I i lll l uzi39aitl l ti 39 waft dense ll Hnn hi ar I FIJEEJEH IWLQEJSE r uniEu ifquot I he39lllth quoti39 l it39i infith Murat Eil e39i39 HEf r Ea l39Jl L i i u H l ll 1 i 5 739 I H i I I Fellini quot mmquot 1 1 l le v s15 EdllLE Etaoedius f I Leakage l 39 LEL39J39IEl39i I I musua muss a I 4 l H l i Li m Nonorganic Hearing Loss De nition apparent loss of hearing without an organic disorder or with insufficient pathological evidence to explain the extent of the loss Other names pseudohypacusis functional hearing loss malingering
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