0:00
so we can't hear this it's it's going I
0:03
haven't turned it on yet when I do it's
0:04
going to blast out a 65 khz beam because
0:08
the wavelength is so small it doesn't
0:10
spread because 65 khz has a wavelength
0:12
like that it's going to be in that sense
0:15
similar to a Las laser it just comes
0:17
right out as a beam now how do we make
0:19
that audible well they put a modulation
0:22
on top of the 65 khz there's a
0:24
modulation and now here's the next thing
0:27
I have to tell you that 65 khz is very
0:29
high amplitude it won't hurt you we
0:32
don't think okay you certainly can't
0:34
hear it and we don't think it'll hurt
0:36
you and um it's very high amplitude and
0:39
what happens when you have two sound Wes
0:41
like this sound plus sound can create
0:44
sound but only at high amplitudes at low
0:47
amplitude sound waves just travel right
0:49
through each other you may be S of
0:50
familiar with this but at high amplitude
0:53
you can create sound so what happens in
0:55
this apparatus is the audio sound the
0:58
sound that you're going to hear is
0:59
actually created in The Beam not here
1:03
and because it's created in the beam and
1:05
it stays in the beam we have a beam of
1:06
sound so let me demonstrate this for let
1:08
me turn it on and I'm going to find the
1:11
piece of music that we like yeah you may
1:16
Eagles you like the eagles okay good oh
1:19
we have a we have a friendly audience
1:21
this year yeah I think you're just
1:23
saying that to make us feel better right
1:37
worth the $2,000 it's not it's not our
1:43
now the sound that you're hearing is
1:45
being created in this beam it almost
1:47
sounds like it's coming from your head
1:49
so let me hit let me try to scan the
1:51
whole audience here so everybody gets
1:53
can hear this absolutely
1:58
remarkable are you getting
2:09
let's try to one more thing let's try to
2:11
Bounce It Off the Wall raise your hand
2:13
if you can very clearly hear it I'm
2:15
going to try to Bounce It Off the Wall
2:17
look at where the hands are raised
