From their website :

“The sound pressure at the ultrasonic focal points is sufficiently high to
radiate audible sound based on the self-demodulation effect in air.
Consequently, the ultrasonic focal points act as audible sound sources.
This sound-point method enables us to control aerial audio distributions
more flexibly and more precisely in comparison with conventional
superdirectional (sound-beam) loudspeakers.”

On 8 March 2018 at 00:36, Augustine Leudar <augustineleu...@gmail.com>
wrote:

> also it seems to be suggesting it can project sounds to precise points in
> space, at different distances from the speaker - in a way that someone
> breaking the beam wouldnt necessarily hear it (as they do in normal
> directional speaker sin museums etc) - thats the bit Im skeptical about....
>
> On 8 March 2018 at 00:24, Augustine Leudar <augustineleu...@gmail.com>
> wrote:
>
>> 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/>
>>> * Viber: +16047159441 Skype, LinkedIn & Twitter: charlierichmond
>>> * facebook: charlie.richmond
>>> * facebook.com/pages/Richmond-Sound-Design-Ltd/130195960832
>>> <https://www.facebook.com/pages/Richmond-Sound-Design-Ltd/130195960832>
>>> * google.com/+CharlieRichmond google.com/+Richmondsounddesign
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>>
>>
>>
>> --
>> Dr. Augustine Leudar
>> Artistic Director Magik Door LTD
>> Company Number : NI635217
>> Registered 63 Ballycoan rd,
>> Belfast BT88LL
>>
>>
>
>
> --
> Dr. Augustine Leudar
> Artistic Director Magik Door LTD
> Company Number : NI635217
> Registered 63 Ballycoan rd,
> Belfast BT88LL
>
>


-- 
Dr. Augustine Leudar
Artistic Director Magik Door LTD
Company Number : NI635217
Registered 63 Ballycoan rd,
Belfast BT88LL
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