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Radium sound field system: Phonic Ear. (Hardware)., $1,350 (educational discounts available)

An FM sound field system, Radium was designed to improve classroom acoustics and overcome the effects that background noise, reverberation and distance can have on speech intelligibility. The portable system, at two feet tall and 11 pounds, has just one speaker, requires little set-up and is ideal for traveling teachers and mid-sized or shared classrooms.

Using a technology called phase angling, the Radium is able to direct more of the sound out toward the listeners, instead of into the ceiling and floor. The 110 Hz to 10 kHz frequency range means students hear a natural--not tinny or sharp--sound.

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Publication:District Administration
Date:Jun 1, 2002
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