Abstract
The relation between language (articulation) ability and hearing levels at each frequency (500⋅1000⋅2000⋅4000Hz) was studied in 92 cases (5-12 years) with mild and moderate sensorineural hearing impairment, who had neither any auditory training nor hearing aid.
The results obtained were as follows.
(1) The children with hearing levels below 25dB at 500⋅1000⋅2000Hz and over 50dB at 4000Hz, exhibited normal language development. But almost all of them exhibited articulation disorders.
(2) Many children with hearing levels below 25dB at 500⋅1000Hz and over 50dB at 2000⋅4000Hz, exhibited normal language development. But almost all of them exhibited articulation disorders.
(3) The children with hearing levels below 25dB at 500Hz and over 50dB at 1000⋅2000⋅4000Hz, exhibited language retardation and articulation disorders.
(4) Many children with hearing levels of 40-60dB at 1000⋅2000Hz and below 25dB at 4000Hz, exhibited language retardation. But a few children exhibited articulation disorders.
(5) Many children with hearing loss at 1000⋅2000⋅4000Hz more than 40dB, exhibited language retardation and articulation disorders.
