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Fig. 6 is a differential analysis of the better ear of the failed children, before and after
treatment. It is a guide to the educational impairment existing, but modification of education
for individual children depends on whether deafness persists after treatment.
Fig. 7 is a differential analysis of all ears before and after treatment.
The results of the tests show that 91 per cent. of the children had normal hearing, or less
than 9 decibels loss of hearing, and 9 per cent. had 9 or more decibels loss.
In terms of ears 93.9 per cent. have normal hearing or less than 9 decibels loss, 2.2 per
cent. had 9, and the remainder had more than 9 decibels loss.
The clinical defects found amongst the children with 9 or more decibels loss on the second
test, who presented themselves at the clinical examination were as follows:—
Catarrhal condition of middle ear, 75; wax, 53 ; otorrhoea, 35 ; tonsils and adenoids, 17 ;
dry perforation of tympanic membrane, 10 ; nothing found, 7 ; scars in tympanic membrane, 6 ;
rhinitis, 5 ; adenoids, 3 ; old mastoid operation, 2 ; debility, 1 ; deflected septum, 1 ; foreign
matter, 1 ; nasal catarrh, 1 ; sclerosis middle ear, 1.
In the latter part of the year, an audiometric examination with the Pure Tone (2B)
audiometer of all the deaf and partially deaf children, was commenced. It was found impossible
CI