Now, Japanese researchers have discovered that how effectively we clean our teeth and how satisfied we are with the brushing job we do depends a lot on the sound of the bristles scrubbing against the enamel. In trials with volunteer teeth cleaners, the team used a tiny microphone in the toothbrush to “sample” the sound being made in the mouth during brushing and to modulate it in some way and then feed that sound back to the volunteer.
Writing in the International Journal of Arts and Technology, Taku Hachisu and Hiroyuki Kajimoto of The University of Electro-Communications, in Chofu, Japan explain how modulating the brush sound affects brushing efficacy and satisfaction. The team found that if they manipulated the pitch, or frequency and loudness, of the brushing sound they could alter the volunteers’ perception of comfort and accomplishment. They also showed that if they gradually increased the frequency as teeth cleaning progressed, the volunteers felt like the process was more comfortable and that their teeth were cleaner at the end of the process.
Hachisu, T. and Kajimoto, H. (2015) ‘Modulating tooth brushing sounds to affect user impressions’, Int. J. Arts and Technology, Vol. 8, No. 4, pp.307–324.
Original article: Aural feedback for oral hygiene.
via Inderscience – Science Spot http://ift.tt/1NZheta