| what's this "-20" line? i'm looking at my chart, there's something called a "pure tone audiogram". it's got freq along the x-axis and "intensity level in dB HL" along the y. the graph is also described as "masking level in non-test ear".
i'm between 0 and 10 from 250 Hz to 4k, then around 18 @ 5k and 30 @ 8k. the doc said it was the high freqs that i'm missing (or "average", in his words), so i assume between 0 and 10 is good.
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She's tidied up and I can't find anything
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