Hi Charlie !
Im aware of course of directional loudspeakers that use ultrasonic beating
- but I understood this is able to position sounds in 3D space - without
physically having to point the speaker - if so that would be quite a cool
advance,
best
Gus

On 7 March 2018 at 23:51, Charlie Richmond <charlie....@gmail.com> wrote:

> These have been around for a long time and they do work but there is a
> sharp sweet spot and no bass at all of course...  and it's really only
> stereo for the one person they are focused on but if the 3d imaging of the
> original source is reasonable then the one listener will definitely hear
> the 3d imaging that one can hear with two regular loudspeakers when they
> are precisely in the originally prescribed sweet spot.  Therefore, you can
> say that they technically do what they say they can do but that is less
> than regular a good stereo speaker pair.  The main feature is that the
> ultrasonic beating that the two drivers do which produces the audible sound
> at the crosspoint is only audible for the one listener exactly in the
> crosspoint and not audible to anyone else in the vicinity, which is a good
> trick when it is desired.
>
> Charlie
>
> Charlie
>
> On Wed, Mar 7, 2018 at 2:47 PM, Augustine Leudar <
> augustineleu...@gmail.com>
> wrote:
>
> > Im desperately trying not to be skeptical because I really really want
> this
> > to be true - has anyone had a chance to test one out ?
> >
> > http://www.electronicbeats.net/the-feed/ultrasonic-
> > speaker-emits-3d-spatial-sound/
> >
> > ?
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>
>
> --
> * Charlie Richmond - http://www.RichmondSoundDesign.com
> <http://www.richmondsounddesign.com/>
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-- 
Dr. Augustine Leudar
Artistic Director Magik Door LTD
Company Number : NI635217
Registered 63 Ballycoan rd,
Belfast BT88LL
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