title: High-frequency audiometry. Masking of air- and bone-conduction signals.
abstract: Interaural attenuation has been investigated for both air-conduction and bone-conduction signals in the frequency ranges 0.25-18 and 0.25-16 kHz respectively. Ear canal occlusion is recommended when using the Koss HV/1A earphone for BC masking, as acoustic transmission occurs through the headset in the high-frequency range. Minimum masking levels for 1/3-octave filtered white noise were established for bone-conduction signals in the frequency range 8-16 kHz. Central masking of bone-conduction signals proved to be of the same order of magnitude in the conventional- and high-frequency ranges, while the cross-masking level was approximately 10-15 dB lower above 6 kHz. Recommendations are made for a masking procedure in the high frequency range.
authors.affiliation: Department of Otorhinolaryngology, Ullevål Hospital, Oslo, Norway.
authors.forename: P
authors.initials: P
authors.lastname: Hallmo
authors.forename: A
authors.initials: A
authors.lastname: Sundby
authors.forename: I W
authors.initials: IW
authors.lastname: Mair
mesh_terms: D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D001301:Audiometry, Pure-Tone; D001307:Auditory Perception; D001309:Auditory Threshold; D001844:Bone Conduction / Q000502:physiology*; D002648:Child; D004423:Ear / Q000473:pathology / Q000503:physiopathology; D005260:Female; D034381:Hearing Loss / Q000473:pathology* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010470:Perceptual Masking