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Effect of the acoustic filtering device on the timing of sound reaching the right eardrum. The data represent cochlear microphonic measurements from five owls of the difference in the timing of the microphonic before versus after insertion of the passive acoustic filtering device, with the sound source locate at 0° azimuth, 0° elevation (data from Gold and Knudsen, 1999). Thethick dark line indicates the median value; theshaded area indicates the range of values.
