• For each ear, pure-tone thresholds measured under audiometric - TopicsExpress



          

• For each ear, pure-tone thresholds measured under audiometric earphones shall not exceed a four-frequency average (500, 1000, 2000, 3000 Hz) of 25 dB HL, thresholds at none of these single frequencies shall exceed 35 dB HL and thresholds at 4000 Hz shall not exceed 45 dB HL. • Speech recognition scores shall be 88 percent or better in each ear at 50 dB HL in quiet, using half lists (25 test words) of recorded monosyllabic words presented under standard audiometric earphones (Northwestern University Test. No 6).
Posted on: Sun, 25 Jan 2015 03:31:04 +0000

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