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This is Vandita's unaided audiogram recorded on 20.04.2009. It is showing more than 100 dB loss at higher frequencies. At lower frequencies, loss is not less than 95 dB either. Right ear is slightly better, but not enough to hear even some useful louder sounds, therefore, it was not an encouraging result of pure tone audiometry of both the ears.
Here is aided audiogram of her, taken on 8-04-10 at Hinduja hospital prior to the CI surgery to determine the candidacy. At lower frequencies, loss is 40 dB to 45 dB at mid frequencies, 50 dB to 60 dB and at higher frequencies more than 80 dB. From this audiogram, it is clear, that most of the sounds not only at higher but also at lower frequencies are missed. Vandita found difficulties in listening sounds like z and v at lower frequencies; p, h and g at mid frequencies and f, s and th at higher frequencies. Although she could speak most of these sounds by articulation practice through speech therapy given to her.
Audiogram after CI and four mappings shows her hearing levels; 25 dB at 250 Hz; 20 dB at 500 Hz and 1000 Hz; 15dB at 2000 Hz and 4000 Hz; and at 8000 Hz, it is 25 dB. So, the findings are good enough because now she is able to hear all sounds falling in speech banana. However, it does not mean that she start listening as a normal child from now on, she should be given a lot of listening practice through her Cochlear Implant. An intensive auditory verbal therapy is a key of success. I already mentioned that she is experienced of listening with Hearing Aids and there was an auditory connection to sounds so it is bit easier for her to connect to those sounds.