Work-up Audiometry PTA: threshold elevated in high frequency a tone decay test: positive Speech audiometry u Acoustic impedance ABR: latency of wave V prolongs, or wave V disappears Acoustic emissionWork-up ◼ Audiometry ◼ PTA: threshold elevated in high frequency ◼ tone decay test: positive ◼ Speech audiometry ◼ Acoustic impedance ◼ ABR: latency of wave V prolongs, or wave V disappears ◼ Acoustic emission