Printer Friendly
The Free Library
22,725,466 articles and books

Radium sound field system: Phonic Ear. (Hardware).



www.phonicear.com, $1,350 (educational discounts available)

An FM sound field system, Radium radium (rā`dēəm) [Lat. radius=ray], radioactive metallic chemical element; symbol Ra; at. no. 88; at. wt. 226.0254; m.p. 700°C;; b.p. 1,140°C;; sp. gr. about 6.0; valence +2. Radium is a lustrous white radioactive metal.  was designed to improve classroom acoustics acoustics (ək`stĭks) [Gr.,=the facts about hearing], the science of sound, including its production, propagation, and effects.  and overcome the effects that background noise, reverberation and distance can have on speech intelligibility Noun 1. speech intelligibility - the intelligibility of speech (usually measured in the presence of noise or distortion)
intelligibility - the quality of language that is comprehensible
. 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 tin·ny  
adj. tin·ni·er, tin·ni·est
1. Of, containing, or yielding tin.

2. Tasting or smelling of tin: tinny canned food.

3.
 or sharp--sound.

[ILLUSTRATION OMITTED]
COPYRIGHT 2002 Professional Media Group LLC
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2002, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

 Reader Opinion

Title:

Comment:



 

Article Details
Printer friendly Cite/link Email Feedback
Publication:District Administration
Date:Jun 1, 2002
Words:108
Previous Article:Palm m130: Palm. (Hardware).
Next Article:The Classroom Kit: Scantron. (Hardware).



Related Articles
Reassessing radium's risks: military men and children may unwittingly have participated in a massive radiation experiment.
Before "Invented" Spelling: Kindergartners' Awareness That Writing Is Related to the Sounds of Speech.
Achieving Compliance with the Radium Standards for Drinking Water in a Midwestern Community: A Case Study.
Mighty mica: synthetic clay remediates radium. (Innovations).
Laser PC6 word processor: Perfect Solutions Inc. (new products).
Pocket Snails.
Reading Readiness program: Knowledge Adventure.
Something Out of Nothing: Marie Curie and Radium.
JVC Develops 'Near Speaker Surround' Technology.

Terms of use | Copyright © 2014 Farlex, Inc. | Feedback | For webmasters