PMC3447230_01
Pure-tone threshold levels of the twins after cochlear implantation (age 3, 5 years).
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fig3
When observing the twins' audiograms at 3.5 years old, just after CI, (Figure 3), the pure tone thresholds for most frequencies were very similar.
Twin's speech perception test's results (taken in 2009, 5 years of implant use). Disyllabic words test discrimination score, Monosyllable test, Monosyllable phoneme test, Number test, Number phoneme test, and Phrases: sentences test.
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fig4
However the speech perception tests performed after 5 years of CI use (Figure 4), show that the twin girl (ICC88, III : 7) had an overall good performance throughout the tests while the twin boy (ICC89, III : 6) got poorer results, had difficulties regarding some of the age appropriate tests that are part of the standard evaluation, and was not even able to respond to some of the tests.
PMC3447230_02
Twins' audiological test results in the last three years. (a) CAP: Categories Auditory Performance; (b) TPP: closed-set word perception test; (c) Articulation: verbal articulation test; (d) Vowels: percentage of accurate vowels; (e) GACV: Vocal characteristics test (voice intensity, pitch, nasal resonance, intonation and breathing, etc.); (f) SIR: Speech Intelligibility Ratting.
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PMC3447230_02_CRIM.GENETICS2012-623860.005.jpg
fig5
The audiological tests from the last three years revealed the twin boy's favourable evolution since this social alteration (Figure 5).