The high-frequency sound from the transmitter produces sharp reflections of small objects for the same reason that an electron microscope (which operates at high frequencies) can see smaller things than a light microscope (which operates at low frequencies).

ECONOMIST: Archaeology

The machine that Dr O'Brien and Dr Frazier have designed to get round these constraints consists of a transmitter that sends out a pulse of sound at a frequency of 6 kilohertz, and an array of 52 receivers that collect the reflections from anything buried beneath the surface.

ECONOMIST: Archaeology

The dock is suggested to include an FM transmitter for piping navigation audio throughout your vehicle's sound system, as well as allowing external DAPs to be heard through more than just a built-in tweeter, but we're still waiting to see if TomTom plans on this being a standalone unit or if it fits better integrated into one's dash.

ENGADGET: TomTom DUO to hit CeBIT, tout handsfree calling

"We switched on the transmitter, tuned our radios to 91.6 MHz and the sound came though loud and clear".

UNESCO: Communication and Information

The transmitter's 2.4GHz wireless technology accommodates up to eight LightSpeakers, equaling stereo sound in multiple rooms.

ENGADGET: Klipsch LightSpeaker makes whole home audio as simple as screwing in a light bulb (hands-on)