Maturational Changes in the Waveform of Auditory Middle Latency Responses
1984 Volume 27 Issue 6 Pages 737-741
Details
1984 Volume 27 Issue 6 Pages 737-741
The investigation using digital filtering on the auditory middle latency response (MLR) to click was performed and the results were compared in infants and adults.
The subjects were 10 children aged 8 to 10, and 7 children aged 11 to 14. All of them were proved to have normal hearing. The waveforms of the infants changed gradually into the waveforms of the adults during the age of 8 to 14. Pa detectability on high pass filtering of 40Hz and Pb detectability of 20-40Hz increased gradually with aging, and reached to the adults score (100%). The peak Pa and Nb decreased in latency with aging. From these results, the existence of the maturational effects on the MLR is recognized, and the infant MLR changes into the adult MLR in around 13 to 14 years old.
