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. Author manuscript; available in PMC: 2012 Nov 6.
Published in final edited form as: J Toxicol Environ Health A. 2011;74(19):1280–1293. doi: 10.1080/15287394.2011.587106

Figure 1.

Figure 1

Mean hearing levels (HL) with standard deviation bars are plotted as a function of frequency (1000, 2000, 3000, 4000, 6000 or 8000 Hz) using a traditional audiogram format for 102 ears of 53 lead (Pb) exposed children residing in rural Pb-glazing areas in the Andes Mountains of Ecuador. Note that on the traditional audiogram, zero is plotted at the top of the graph. The audiogram shows that the Pb-exposed children’s mean hearing thresholds are well within the normal range (≤ 20 dB HL).