干预：利用电声门图对120例正常人在胸声区以不同音频发音进行检测。
INTERVENTIONS: The pronunciation with different audio frequency at thoracic sound area of 120 normal subjects were examined by EGG.
干预：利用电声门图对120例正常人在胸声区以不同音频发音进行检测。
INTERVENTIONS: The pronunciation with different audio frequency at thoracic sound area of 120 normal subjects were examined by EGG.
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