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1 brush STROKE (an up and down motion) = 2 brush MOVEMENTS (one up, one down) And that means … 31,000 brush-STROKES-per-minute = 62,000 brush-MOVEMENTS-per-minute. They describe the same rate of speed (frequency). So, there’s nothing new and improved here. Both brushing action descriptions are equivalents.
Sorry, there was a problem. Please try again later.Hello! The Philips Sonicare Toothbrush produces 31,000 brush strokes/min or 62,000 brush movement/min.
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