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The increases in preferred listening levels calculated for earbuds (n=23), headphone (n=23), canal earphones (n=23), and CP with NC (n=10) by subtracting the preferred listening levels selected in a quiet condition from that selected in a noisy one, when listening to (A) pop-rock music and (B) classical music. *p<0.05; †p<0.01. CP, canal earphones; NC, noise cancelling.
