1. Frequency Transposition in hearing aids for school-age children Jenny Smith 1,2 ,Marilyn Dann 1 and Margaret Brown 1 1 Deafness Studies Program, Graduate School of Education, University of Melbourne, Australia. 2 Jenny Smith, Audiological Consultancy, South Yarra, Australia Contact: jensmi@ozemail.com.au
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14. Setting AE Turquoise AE=2000 E Purple AE= 2000 B Green AE=2500 B Blue AE=3200 B
16. Evaluating Aid Benefit Test Parameter Parent/student Questions and interviews Changes in overall hearing Teacher /student LIFE Changes in classroom listening Recorded speech sampling Speech Production Goldman-Fristoe Test of Articulation Speech Articulation CNC words and phonemes Speech Perception
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18. Speech Perception : CNC words Significantly better scores recorded 6 weeks post-fit and sustained over time
19. Speech Production: G-F 2 Test Substitution : initial /z/ with /d/, Omission: final /v/ Lateralised: initial /dz/ Substitution: final /f/ with /s/ Omission: Final /d/ Slushiness greatly reduced Says himself with AE off he cannot hear /s/ 90 Post Fit Omission: final /dz/, /v/, /s/, /z/ Lateralised: initial /s/ Omission: final /s/ Substitution: kl with kr sp with /b/ Omission: initial /g/ final /p/; substitution: medial /v/ with /b/; weak /r/ Slushy quality Lateral /s/ 54 Pre-Fit Fricatives sentences Fricatives In words Consonant clusters Single consonant Over-all production G-F Score
22. Classroom listening: LIFE +35 +17 0 -17 -35 LIFE Student Response LIFE Teachers Response +35 = Strong support for positive change: use is highly beneficial 12 weeks post FT introduction 81.6 (+ 18.3%) 86.6 63.3 IN9-AE % 12 wks post -fit IN9 –M % 3wks post-fit Pre-Fit %
23. Described benefit Not really, he’s a teenager One at a time is OK Participating more in family discussions Most definitely I hear the whole sentence Responding better in 1:1 conversations Not that I have observed I heard the birds Hearing high soft environmental sounds Definitely hearing car indicators and gears I hear the phone ring and the kettle boil Hearing new sounds These aids are working wonders for him I am hearing, not deaf Overall comment Much clearer, even his grandfather commented Sounds different Changes in own speech Sometimes Same as old aids Understanding unknown speakers Parent Student
29. Speech Perception : CNC words Significantly better scores with frequency transposition (AE-ON) over time Middle ear infection and school holidays linked to poorer scores at 12-18wks
42. Figure 1.1 Similarity of the two vowels oo and ee when the second formant is inaudible because of hearing loss ( grey area). Sound level ee 250 1000 4000 Frequency (Hz) 500 2000 oo First formant Second formant Source: Dillon (2001): Hearing Aids Audibility of formants
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Hinweis der Redaktion
Exomphalos occurs when the abdomen fails to close around the base of the umbilical cord during the early development of the baby.
Working with teachers, there is big emphasis on learning to listen – prelingual losses – we don’t talk about acclimaitization it is all new info One way to explore is too see what happens when we take aweay the freq trans
Learing points: 1 he is not an engineer – doesn’t have the technical specs for inteo – 2. He is boy with a profound loss and doesn’t have the auditory map 3. he has had AE for 6 months and his ear and his brain have begun a conversation – this is neural plasticity at work 4. He is searching for the way to describe what has happened – its quieter ,lower, not quite what he wants to say 5. He searches his memory – he has just left primary school and in aust primary schools tod’s would regualrly verify aid function using ht eLING sounds – this means they say where are you aids – this boy is a reluctant user – so teach will say your schoolbag doesn’t need to hear - turn your back tell me if you can hear – oo,ee, ah sh,s – doesn’t hear – increase intenisty and lateralise sound ( and give a spray) child hears – but also then learns the lateral /s/ 6. So he remembers this and rehearses exactly as he would have seen at school AEoff, doesn’t hear 7. This is a spontaneous video clip which is strong clinical evidence and I find fasciniating