Probe-tube microphone measures of ear-canal sound pressure levels in infants and children.
Probe-tube microphone measures of ear-canal sound-pressure levels were obtained for 31 children under 5 years of age. These data were compared to similar measures from a group of 21 adults. The intrasubject variability was smallest for the frequency range from 750 to 3000 Hz and at no frequency did the mean standard deviation exceed 3 dB. Real ear to coupler differences for the children showed the same pattern as a function of frequency as for adults but were significantly larger. A systematic decrease in real ear to coupler differences was observed with increasing age between 1000 and 3000 Hz. An estimate of ear-canal volume did not appear to be a clinically useful predictor of real ear to coupler differences.
Boys Town National Institute for Communication Disorders in Children, Omaha, Nebraska.
J A
JA
Feigin
J G
JG
Kopun
P G
PG
Stelmachowicz
M P
MP
Gorga
D000293:Adolescent; D000328:Adult; D002675:Child, Preschool; D004424:Ear Canal / Q000502:physiology*; D006310:Hearing Aids; D006801:Humans; D007223:Infant; D008875:Middle Aged; D011312:Pressure; D013016:Sound