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Electric toothbrushes can also be classified according to the speed of their movements as standard power toothbrushes, sonic toothbrushes or ultrasonic toothbrushes. If the motion of the toothbrush is sufficiently rapid to produce a hum in the audible frequency of human range (20 Hz to 20,000 Hz), it can be classified as a sonic toothbrush. Any ...
The Burst Original Sonic Toothbrush is a $60 brush that has three different cleaning modes, is rechargeable, and comes with a smart timer. ... consumers and experts seem to love Philips Sonicare ...
A Philips Sonicare 5100. This model has 2 cleaning modes . 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).
Visual depiction of a compact wireless keyboard. A wireless keyboard is a computer keyboard that allows the user to communicate with computers, tablets, or laptops with the help of radio frequency (RF), such as WiFi and Bluetooth or with infrared (IR) technology. Wireless keyboards in the current market are commonly accompanied by a wireless mouse.
Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in vehicles, power tools, electric toothbrushes, and medical devices.
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SonicEnergy (previously uBeam) was founded in 2011 by Meredith Perry and won the University of Pennsylvania's invention competition, PennVention, in April 2011. [1] It demonstrated its first prototype of the technology at The Wall Street Journal's All Things Digital Conference, D9, in May 2011.