dentiphone
/ˈdentəfəʊn/a telephone-like device that transmits sound directly to the teeth, used for communication in noisy environments
noun [专属名词] 牙助听器
The dentist used a dentiphone to listen for any abnormalities in the patient's teeth. 牙医使用牙音器来听患者牙齿是否有异常。
