The engineers found a way to kick-start a radio-frequency device wirelessly using an external power source initially, but running the device afterward on the output of power generated by the inner ear.
In a study published in 2006, researchers at Carnegie Mellon University who rode 37 airline flights with a radio-frequency measuring device found emissions from cellphones that could interfere with global-positioning satellite systems.
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It works by jamming all nearby transmissions at the operating frequency of the medical device, except for those signals that were authorized to use the device.
While the device uses the same radio frequency band as the upcoming personal area networking technology Bluetooth, it uses a different transmission protocol.
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But from a product standpoint, the fastest growth will be seen in conventional device categories like accelerometers and radio frequency MEMS that target consumer applications.
U.K.-based Compound Security Systems Ltd. sells a device to repel loitering teens with a frequency adults can't hear.
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Huawei Ascend P1 LTE is currently the device compatible with the highest number of frequency bands and is being tested on operators' networks across Europe, Latin America, North America, Asia-Pacific.
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The range on the device, which operates on the same 900-megahertz frequency as most cordless phones, is terrific.
Apple introduced its version, called Fusion Drive, that tiers storage on flash memory or a HDD depending upon frequency of use, but appearing to the user as a single storage device.
The device recognizes a signal that is "hidden" in a broadcaster's frequency and automatically sends the information back to Arbitron every night.
One such project is called NewsFlash, and uses high-frequency red and green light to transmit data to the built-in camera on a receiving device -- in this case Samsung's Epic 4G.
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