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Figure 1. One-third octave noise measure for a given fitting: red = broadband microphone system; violet = high frequency (HF) emphasis microphone system; and black = high frequency emphasis microphone system plus adjusted low level expansion thresholds or noise compensation.

Figure 1. One-third octave noise measure for a given fitting: red = broadband microphone system; violet = high frequency (HF) emphasis microphone system; and black = high frequency emphasis microphone system plus adjusted low level expansion thresholds or noise compensation.

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