hey guys I’m Nate welcome back to a
workshop today we’ve got a fun
experiment where we’re going to see what
happens if we put a microphone and a
speaker in our vacuum chamber as many of
you probably know sound waves are
vibrations in the air around us and so
in theory if we take away that air those
sound waves should no longer propagate
and we shouldn’t be able to hear
anything we want to try putting that to
the test in a few different ways as a
first test let’s try putting our speaker
into the chamber but leaving all of the
air in and see how much of the sound our
microphone can pick up right outside the
glass wow that’s a huge difference right
there well I guess we know that glass
and thick Plexiglas does a good job of
dampening sound all on its own all right
I think we’ve pretty well established
what its gonna sound like with our
speaker in air inside the vacuum chamber
so now we need to try pulling out the
air but I also want to make sure that we
aren’t just blasting too much sound
straight into the glass because that can
also conduct the noise so to add a
little bit of padding let’s throw some
cotton balls down into the bottom of our
chamber and make sure that our speaker
is facing the correct direction this
speaker actually blasts the sound out of
the back
so we’ll try putting it face down on top
of a pile of cotton balls to make sure
that we’re really playing into a vacuum
as much as possible that seems like a
good amount of cotton balls it should
keep our speaker off of the glass so the
sound is just projecting into the air or
the lack of air once we pull a vacuum
now let’s try pulling out a vacuum hope
that our Bluetooth speaker still works
in a vacuum and see if we can hear it
all right air is being pulled out
I admit I hadn’t actually tried seeing
what happens with cotton balls in a
vacuum before just now I don’t think
it’s gonna do anything and it looks like
I’m right they aren’t puffing up the way
marshmallows do because they aren’t
holding any air
there’s just air in between the fibers
this is looking good almost up to a
vacuum we have very little air in there
right now at about 25 on this pump the
most vacuum it pulls is about 26 inches
of mercury all right that is really
close we’re gonna try calling that good
let’s see how well we can hear our
speaker or not
with a vacuum here goes playing the same
clip of music oh if I touch my ear
to it then I can hear a little tiny bit
it’s extremely quiet and I can’t hear
anything if it’s on the glass it’s only
on the Plexiglas side where the speaker
is actually pointed right at it so there
may be a tiny tiny bit of air still in
there or maybe it’s conducting directly
through the speaker into the cotton
balls into the glass through the rubber
to the plexiglass I don’t know I’m not
sure how it’s getting there but like
this I can barely hear the faintest
music other than that see I’m gonna try
it like pushing it touching this
microphone to the plexiglass I don’t
know if it’ll pick anything up so quiet
all right let’s let the air back in
while it’s still playing and we’ll see
what happens
letting it in slowly so we can kind of
see at what point we can hear it
I’m hearing a little bit of it now
[Music]
all right that seems like a pretty good
conclusive test to me that this does not
play well through a vacuum there was
just the tiniest bit of sound that was
able to get through somehow maybe
there’s just a little bit of air in
there maybe was conducting through the
other materials inside the chamber but
it was almost completely silent so now
let’s try switching put the microphone
inside the speaker outside and see if
the microphone can pick anything up all
right let’s pull all the air out and
then we’ll turn on the sound and see if
the microphone can pick anything up all
right let’s call that good microphone is
still recording we’ll see if it can pick
up any of the sound here goes
[Music]
all right now also as an experiment
let’s try touching the speaker to the
glass and the plexiglass and see if it
picks anything up like that all right
let’s let the pressure back in and we’ll
find out how it went
I’ll try letting some music play while
it depressurizes to see at what point
the microphone starts picking things
back up
[Music]
[Music]
there we go microphone in the vacuum
chamber with the speaker outside the
vacuum chamber now I want to try putting
both of them in the vacuum chamber with
the cotton balls and then pulling the
air out and I think I might actually try
letting the sound run as the air pulls
out so we can see if it just slowly
drops off as we run out of air give a
shot speak here in here make sure it’s
not touching the walls microphone in
there all right there we go
we’ve got both of them in there let’s
get the sound going and then start
pulling out the air and see if we get
that sound to just seem like we’re
turning down the volume knob
[Music]
[Applause]
[Music]
very quietly I can hear if I touch my
ear to the Plexiglas like really press
it on there think I can even hear it a
little bit with my ear on the glass
itself this time super quiet though
alright let’s let the air back in while
it’s still playing see what kind of
result we get
[Music]
all right there we go
both the microphone and the speaker in
the vacuum chamber at the same time
pulling the vacuum while it’s playing
music so hopefully we can hear the sound
diminishing as it loses the ability to
transfer the sound through the air now
I’ve had a chance to go and listen to
the sounds that the microphone recorded
while the microphone and the speaker
will both inside the vacuum chamber with
no air I really thought that the sound
is gonna be almost nothing that it would
be almost completely silent but the
microphone managed to pick up quite a
bit of the music from the speaker so
something in that chamber is still
vibrating enough to get the sound from
our speaker to our microphone there you
have it playing sound and music inside a
vacuum chamber we tried a whole bunch of
different varieties with the speaker or
the microphone inside the chamber
outside the chamber both inside the
chamber and I think we got some really
good results and luckily for us our
microphone does still function in a
vacuum that was good to learn this has
been a really fun experiment I love
learning and testing new things like
this thank you for joining us for this
video today and remember to come gear
yourself up with products and merch at
the king of random calm see you there
hey guys I’m Nate what man a little
worried about the LCD screen so far it
seems alright
sorry I’m super white
workshop today we’ve got a fun
experiment where we’re going to see what
happens if we put a microphone and a
speaker in our vacuum chamber as many of
you probably know sound waves are
vibrations in the air around us and so
in theory if we take away that air those
sound waves should no longer propagate
and we shouldn’t be able to hear
anything we want to try putting that to
the test in a few different ways as a
first test let’s try putting our speaker
into the chamber but leaving all of the
air in and see how much of the sound our
microphone can pick up right outside the
glass wow that’s a huge difference right
there well I guess we know that glass
and thick Plexiglas does a good job of
dampening sound all on its own all right
I think we’ve pretty well established
what its gonna sound like with our
speaker in air inside the vacuum chamber
so now we need to try pulling out the
air but I also want to make sure that we
aren’t just blasting too much sound
straight into the glass because that can
also conduct the noise so to add a
little bit of padding let’s throw some
cotton balls down into the bottom of our
chamber and make sure that our speaker
is facing the correct direction this
speaker actually blasts the sound out of
the back
so we’ll try putting it face down on top
of a pile of cotton balls to make sure
that we’re really playing into a vacuum
as much as possible that seems like a
good amount of cotton balls it should
keep our speaker off of the glass so the
sound is just projecting into the air or
the lack of air once we pull a vacuum
now let’s try pulling out a vacuum hope
that our Bluetooth speaker still works
in a vacuum and see if we can hear it
all right air is being pulled out
I admit I hadn’t actually tried seeing
what happens with cotton balls in a
vacuum before just now I don’t think
it’s gonna do anything and it looks like
I’m right they aren’t puffing up the way
marshmallows do because they aren’t
holding any air
there’s just air in between the fibers
this is looking good almost up to a
vacuum we have very little air in there
right now at about 25 on this pump the
most vacuum it pulls is about 26 inches
of mercury all right that is really
close we’re gonna try calling that good
let’s see how well we can hear our
speaker or not
with a vacuum here goes playing the same
clip of music oh if I touch my ear
to it then I can hear a little tiny bit
it’s extremely quiet and I can’t hear
anything if it’s on the glass it’s only
on the Plexiglas side where the speaker
is actually pointed right at it so there
may be a tiny tiny bit of air still in
there or maybe it’s conducting directly
through the speaker into the cotton
balls into the glass through the rubber
to the plexiglass I don’t know I’m not
sure how it’s getting there but like
this I can barely hear the faintest
music other than that see I’m gonna try
it like pushing it touching this
microphone to the plexiglass I don’t
know if it’ll pick anything up so quiet
all right let’s let the air back in
while it’s still playing and we’ll see
what happens
letting it in slowly so we can kind of
see at what point we can hear it
I’m hearing a little bit of it now
[Music]
all right that seems like a pretty good
conclusive test to me that this does not
play well through a vacuum there was
just the tiniest bit of sound that was
able to get through somehow maybe
there’s just a little bit of air in
there maybe was conducting through the
other materials inside the chamber but
it was almost completely silent so now
let’s try switching put the microphone
inside the speaker outside and see if
the microphone can pick anything up all
right let’s pull all the air out and
then we’ll turn on the sound and see if
the microphone can pick anything up all
right let’s call that good microphone is
still recording we’ll see if it can pick
up any of the sound here goes
[Music]
all right now also as an experiment
let’s try touching the speaker to the
glass and the plexiglass and see if it
picks anything up like that all right
let’s let the pressure back in and we’ll
find out how it went
I’ll try letting some music play while
it depressurizes to see at what point
the microphone starts picking things
back up
[Music]
[Music]
there we go microphone in the vacuum
chamber with the speaker outside the
vacuum chamber now I want to try putting
both of them in the vacuum chamber with
the cotton balls and then pulling the
air out and I think I might actually try
letting the sound run as the air pulls
out so we can see if it just slowly
drops off as we run out of air give a
shot speak here in here make sure it’s
not touching the walls microphone in
there all right there we go
we’ve got both of them in there let’s
get the sound going and then start
pulling out the air and see if we get
that sound to just seem like we’re
turning down the volume knob
[Music]
[Applause]
[Music]
very quietly I can hear if I touch my
ear to the Plexiglas like really press
it on there think I can even hear it a
little bit with my ear on the glass
itself this time super quiet though
alright let’s let the air back in while
it’s still playing see what kind of
result we get
[Music]
all right there we go
both the microphone and the speaker in
the vacuum chamber at the same time
pulling the vacuum while it’s playing
music so hopefully we can hear the sound
diminishing as it loses the ability to
transfer the sound through the air now
I’ve had a chance to go and listen to
the sounds that the microphone recorded
while the microphone and the speaker
will both inside the vacuum chamber with
no air I really thought that the sound
is gonna be almost nothing that it would
be almost completely silent but the
microphone managed to pick up quite a
bit of the music from the speaker so
something in that chamber is still
vibrating enough to get the sound from
our speaker to our microphone there you
have it playing sound and music inside a
vacuum chamber we tried a whole bunch of
different varieties with the speaker or
the microphone inside the chamber
outside the chamber both inside the
chamber and I think we got some really
good results and luckily for us our
microphone does still function in a
vacuum that was good to learn this has
been a really fun experiment I love
learning and testing new things like
this thank you for joining us for this
video today and remember to come gear
yourself up with products and merch at
the king of random calm see you there
hey guys I’m Nate what man a little
worried about the LCD screen so far it
seems alright
sorry I’m super white
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