title: Three studies comparing performance of the ER-3A tubephone with the TDH-50P earphone.
abstract: Three studies compared the performance of the ER-3A Tubephone insert earphone and the TDH-50P-MX41/AR supra-aural earphone. The three factors addressed were: threshold differences in children 7 to 10 yr old compared to adults, differences in real ear attenuation, and threshold differences in the presence of high background noise levels. The influence of insertion depth of the ER-3A Tubephone was also investigated. Findings showed no significant threshold differences between children and adults, significantly better real ear attenuation for the ER-3A Tubephone, and significantly better thresholds for the ER-3A in the presence of high background noise levels. Most critically, there was a significant change in attenuation characteristics of the ER-3A Tubephone, which was dependent on the insertion depth of the ear-tip.
authors.affiliation: Callier Center for Communication Disorders, Dallas, Texas.
authors.forename: J L
authors.initials: JL
authors.lastname: Clark
authors.forename: R J
authors.initials: RJ
authors.lastname: Roeser
mesh_terms: D000328:Adult; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D002648:Child; D005260:Female; D006310:Hearing Aids; D006801:Humans; D008297:Male