VISUAL REINFORCEMENT AUDIOMETRY - COMPARISON OF LOUDSPEAKER ARRANGEMENTS

Two different loudspeaker arrangements are currently used when perform ing Visual Reinforcement Audiometry (VRA). In the one arrangement, the loudspeakers are mounted on separate movable arms and positioned 15 c m from each ear. In the other, the loudspeakers are rigidly mounted cl ose 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 held con ditions. It was shown that a predominantly monaural stimulation was be st achieved by using the 15-cm position, but also that the measurement s 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 pictur e monitors at a distance of 50-70 cm from the child makes a generally appropriate arrangement for VRA.