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. 2011 Mar 2;105(5):2471–2486. doi: 10.1152/jn.00951.2010

Fig. 1.

Fig. 1.

Pure-tone audiograms for subjects in each age group. Each symbol represents a listener's hearing level threshold (in dB HL, right and left ear averaged) at a particular pure-tone frequency. Solid, dotted, and dashed lines indicate group average thresholds as a function of frequency within the young, middle-aged, and elderly group, respectively.