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. Author manuscript; available in PMC: 2008 Apr 15.
Published in final edited form as: J Acoust Soc Am. 2007 Oct;122(4):2154–2173. doi: 10.1121/1.2769625

FIG. 10.

FIG. 10

Variations in sound pressure PAE measured axially in 0.5-mm steps within an artificial ear with the probe-tube microphone (at MEEI) in response to a chirp stimulus. The artificial ear was terminated with a 18-in. condenser microphone. (A) ΔPAE, the ratio of PAE at six locations to PAE near the termination, shown individually on a linear frequency scale. Left: Magnitude ratios in decibels; right: phase differences. Arrows indicate frequencies of |ΔPAE| notches and frequencies where ∠ΔPAE crosses 0.25 or 0.75 cycles. (B) The ΔPAE curves from (A) superposed, plotted on a linear frequency scale. Top: Magnitude ratio in decibels; bottom: phase difference.