Table 1. Group classification according to the results of the Williams test (Y-226 Hz)

	Normal (SD)	ETD (SD)
AGE	30.40 (4.229)	30.80 (4.558)
Air conduction	7.41 dB HL (3.788)	8.040 dB HL (3.851)
Bone conduction	7.21 dB HL (3.851)	7.80 dB HL (3.571)

ETD: Eustachian tube dysfunction.