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OBJECTIVE To compare the difference of octave band CE-Chirp ABR response threshold and behavioral auditory thresholds in children with hearing loss, and to explore the clinical value of octave band CE-Chirp ABR. METHODS Twenty-one children (40 ears) with hearing loss were selected. The octave band CE-Chirp ABR response threshold and behavioral auditory hearing threshold were measured in quiet environment. The results of two different test methods were compared. RESULTS The frequencies of octave band CE-Chirp ABR response thresholds and behavioral auditory thresholds were statistically analyzed. The correlation coefficients at different frequencies were 0.693, 0.830, 0.836 and 0.845, respectively, and the P values were ＜0.05. CONCLUSION There is good correlation between octave band CE-Chirp ABR response and behavioral auditory hearing measurement. Octave band CE-Chirp ABR, as an objective audiometry technique, has good stability and reliability for the objective response of hearing loss, and can better reflect the hearing level.
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Objective To study breathing characteristics of normal children of 6～7 years old when speaking in a normal manner.Methods RM 6240 physiological signal collection and processing system and Hx 100 respiratory transducer were used to collect the average peak expiratory pressure,inspiratory valley pressure,respiratory rate,respiratory depth from 160 normally speaking children.Results When speaking,the average peak expiratory pressure,inspiratory valley pressure,respiratory rate and respiratory depth of chest were all significantly increased (P<0.01);while that of abdomen was all reduced(P<0.05,P<0.01)except for respiratory rate(P<0.05)which was increased.In both respiratory conditions,all the data of abdomen were significantly larger than thaf of chest(P<0.01);all the data of boys were larger than that of girls(P<0.05,P<0.01).Conclusion When speaking,it involves thoraco-abdominal breathing,and the increase of chest activity will increase the volume of inhaled air.The increase of abdominal activity is for better control of respiratory airflow.Abdominal breathing plays a main role in normal speaking.Boys'respiratory muscles,respiratory organs are developed better than girls.