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Study aim
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The aim of this study is to investigate the effect of auditory rehabilitation based on pitch differentiation on speech perception in noise in hearing impaired children 6 to 10 years
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Design
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clinical trial without control group with convenience sampling on 18 hearing impaired children
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Settings and conduct
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The site of evaluation and rehabilitation is in the educational and rehabilitation center for children with hearing disorders. In this method, children with moderate to severe hearing loss evaluate before intervention with vowel consonant in noise test, sentence in noise test, pitch pattern sequence, harmonic evaluation and object-related negative wave. At the end of the intervention, the assessments were repeated and compared with before intervention. Hearing impaired children were examined as an convenience
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Participants/Inclusion and exclusion criteria
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age range 6 to 10 years with moderate to severe hearing loss, no auditory neuropathy, normal middle ear, lack of developmental, cognitive and behavioral problems, normal IQ, Persian language with single language Persian language parents, right hand superiority, no history of head trauma, epilepsy and seizures and use of nervous system drug
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Intervention groups
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The intervention in this study is pitch training. In this type of rehabilitation, a 100 Hz complex stimulus included, frequency of 100 Hz and 10 harmonics present. Then, in different presents , each time one of the harmonics mistune and the person hears two separate sounds that compare and differentiate with the first stimulus. In the second stage, the 200Hz stimulus and in the third stage, the 300Hz stimulus present similar to 100 Hz frequency.
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Main outcome variables
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Consonant Vowel in noise, Sentence in noise, Pitch pattern test, Harmonic discrimination, Object Related Negativity