because they can listen to their favorite radio station or music while still hearing the reassuring voice of the dentist and the nurse at the same time as not getting the unpleasant sound from the dreaded dental drill. >> reporter: simply hearing the noise of the dentist's drill can be enough to trigger anxiety in people, so much so that they put off going to the dentist altogether. now, the inventors of this device hope that it will block out the drill noise when combined with a simple mp3 player and reduce people's fears so they will go and get those vital checkups. dominic hughes, bbc news. >> you know, dominic mentions that idea of like an mp3 player. but i think we all know that sound. >> it's the worst sound. you know it's -- it's never good. never good. knock me out. >> and of course the dentist's office, they try their best once that sound is going to drown it out. ♪ >> oh, kenny g in the house. willis's favorite. yes.