dentist drill

  1. cybercore

    Acoustic cancellation device could alleviate patients' fear of the dentist's drill

    BBC News - Device cancels out the sound of the dentist Some people find the sound of a dentist's drill distressing An invention which cancels out the noise of a dentist's drill could help people overcome their fear of a check-up, researchers say. For many, the sound of the drill is...
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