Skip to main content
. Author manuscript; available in PMC: 2017 Sep 1.
Published in final edited form as: Ear Hear. 2016 Sep-Oct;37(5):603–614. doi: 10.1097/AUD.0000000000000319

Figure 2.

Figure 2

(A) Mean distortion-OAE amplitude as a function of frequency at one primary-tone level, L2 = 60 dB SPL. Thick lines show the mean amplitude for young-adult (black) and middle-aged (gray) groups while thin lines display individual values (dashed gray lines are used for middle-aged subjects). The dashed lines near the bottom of the figure show the mean noise floors. (B) Mean distortion-OAE amplitude as a function of frequency calculated in the young-adult group using the inverse FFT method (black line) and the LSF method (i.e. a fast sweeping rate combined with a long analysis window; gray line). (C) Mean signal-to-noise (SNR) of the distortion component as a function of primary-tone level for each age group with f2 parameterized (circles = young adult; triangles = middle-aged adult.)