Visual reinforcement audiometry. Comparison of loudspeaker arrangements. 1997

L Magnusson, and E Börjesson, and A C Axelsson
Department of Audiology, Sahlgrenska University Hospital, Göteborg, Sweden. Lennart.Magnusson@orlss.gu.se

Two different loudspeaker arrangements are currently used when performing Visual Reinforcement Audiometry (VRA). In the one arrangement, the loudspeakers are mounted on separate movable arms and positioned 15 cm from each ear. In the other, the loudspeakers are rigidly mounted close to their respective picture monitor at a distance of 50-70 cm from the child. In the present study, these two arrangements were compared by measuring real-ear sound pressure levels and actual sound field conditions. It was shown that a predominantly monaural stimulation was best achieved by using the 15-cm position, but also that the measurements were significantly more affected by small head movements when using this close position. When assessing the acoustics as well as practical aspects, it was concluded that loudspeakers mounted beside the picture monitors at a distance of 50-70 cm from the child makes a generally appropriate arrangement for VRA.

UI MeSH Term Description Entries
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D012054 Reinforcement, Psychology The strengthening of a conditioned response. Negative Reinforcement,Positive Reinforcement,Psychological Reinforcement,Reinforcement (Psychology),Negative Reinforcements,Positive Reinforcements,Psychological Reinforcements,Psychology Reinforcement,Psychology Reinforcements,Reinforcement, Negative,Reinforcement, Positive,Reinforcement, Psychological,Reinforcements (Psychology),Reinforcements, Negative,Reinforcements, Positive,Reinforcements, Psychological,Reinforcements, Psychology
D005260 Female Females
D006310 Hearing Aids Wearable sound-amplifying devices that are intended to compensate for impaired hearing. These generic devices include air-conduction hearing aids and bone-conduction hearing aids. (UMDNS, 1999) Ear Molds, Hearing Aid,Aid, Hearing,Aids, Hearing,Hearing Aid
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D001299 Audiometry The testing of the acuity of the sense of hearing to determine the thresholds of the lowest intensity levels at which an individual can hear a set of tones. The frequencies between 125 and 8000 Hz are used to test air conduction thresholds and the frequencies between 250 and 4000 Hz are used to test bone conduction thresholds. Audiometries
D001307 Auditory Perception The process whereby auditory stimuli are selected, organized, and interpreted by the organism. Auditory Processing,Perception, Auditory,Processing, Auditory
D013017 Sound Localization Ability to determine the specific location of a sound source. Auditory Localization,Auditory Localizations,Localization, Auditory,Localization, Sound,Localizations, Auditory,Localizations, Sound,Sound Localizations
D014796 Visual Perception The selecting and organizing of visual stimuli based on the individual's past experience. Visual Processing,Perception, Visual,Processing, Visual

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