supertweeter

supertweeter

[′süp·ər‚twēd·ər]
(engineering acoustics)
A loudspeaker designed to reproduce extremely high audio frequencies, extending into the ultrasonic range, generally used in conjunction with a crossover network, a tweeter, and a woofer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
<www.fpshifi.com> The F1 ($6,000) gives you a lot of drivers: six Multi-Cell MicroTransducer tweeters (each with 12 motors to move a small film diaphragm), two mid-bass, two woofers and a supertweeter. Sound on a Gospel quartet was very natural, but the tenor got hard on loud parts (maybe his voice did); bass fiddle was loud but loose; piano and drums (played too loud) were tizzy.
The speakers were five Sony SS-M9ED models ($8,000 each), with two 8" woofers, 5" mid, 1" tweeter and 1" supertweeter. They weren't using a subwoofer, but they claim that SACD has full bass management (unlike DVD-Audio, which still hasn't corrected this howler of an error).
Finally, the Walsh cone is supplemented by a direct-firing supertweeter that assures that the highest frequencies will be directional enough to avoid rear reflections altogether.
I understand why it is undesirable to use the Walsh driver at these frequencies, but the documentation is silent on the features of this supertweeter that would enable it to avoid the common high-frequency driver beaminess and mesh with the Walsh driver's wide-dispersion sound, and on how it can work at all in the alternative, side-firing speaker orientation.
In other words, Apple could potentially implant different display based speakers for woofers, subwoofers, tweeters, supertweeters and mid-range speakers all right into that flexible screen.