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Ultrasonic toothbrush (Megasonex) An ultrasonic toothbrush is an electric toothbrush designed for daily home use that operates by generating ultrasound in order to aid in removing plaque and rendering plaque bacteria harmless. It typically operates on a frequency of 1.6 MHz, which translates to 96,000,000 pulses or 192,000,000 movements per minute.
In order for a toothbrush to be considered "ultrasonic" it has to emit a wave at a minimum frequency of 20,000 Hz or 2.4 million movements per minute. Typically, ultrasonic toothbrushes approved by the U.S. Food and Drug Administration (FDA) operate at a frequency of 1.6 MHz, which translates to 192 million movements per minute. Ultrasonic ...
The brush head vibrates at hundreds of times per second, with the latest models at 31,000 strokes per minute (517 Hz) or 62,000 movements per minute [1] (1033 Hz). Rather than connecting to its charger with conductors, it uses inductive charging —the charger includes the primary winding of the voltage-reducing transformer and the handle of ...
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A random vibration profile will excite different frequencies along a spectrum at different times. [6] Significant calculation goes into making sure that all frequencies get excited to within an acceptable tolerance band. A random vibration test suite may range anywhere from 30 seconds up to several hours.
Tooth Tunes is a discontinued line of children's toothbrushes released by the Tiger Electronics division of Hasbro in 2007. [1] Each brush played a two-minute song clip from a particular artist to encourage the user to brush their teeth for the dentist-recommended two minutes. A single toothbrush came with one song, and had a manufacturer's ...
However, if you’re not a fish eater, walnuts, chia seeds, hemp seeds and flaxseeds all contain a plant form of omega-3 called alpha-linolenic acid (ALA). So, toss them in your yogurt! So, toss ...
For more than a year, the school and the lacrosse players were thrust into a media frenzy, subjected to intense public scrutiny and damaging allegations of sexual assault that were ultimately dropped.