Is for bone conduction of the right ear & symbol < for bone conduction of the left earPURE TONE AUDIOMETRY Logan Turner 10th/248-49# Air conduction : right- 0 & left-XThe results are charted as audiogramsMasking presents a constant noise to the nontest ear to prevent crossover from the test ear. The purpose of masking is to prevent the nontest ear from detecting the signal (line busy), so only the test ear can respond.AUDIOGRAMFrequency in Hertz (Hz)Fig:">