and that is exactly what we're talking
about sound dampening but does sound dampening really have a role in our
daily lives well if you spend any time in a house apartment or car it
definitely does so sound travels in waves of pressure that can both go
around and reflect off of objects and there are three main ways that we deal
with unwanted sound the first is distance sound waves don't travel
forever as you can observe if you're trying to hear your friend across a
baseball field and you can't quite tell whether he wants you to throw the ball
for a double play or a permission to date your sister the second is using
active anti-noise generators also known as noise cancellation which you can
learn more about here the third is by reflecting and or absorbing unwanted
sound using different shapes and materials so for this example let's say
that sound is like a rubber ball if you throw it at a concrete floor it'll
bounce and reflect off in another Direction but if you throw it at
something like a bed of pillows most of
the energy from the ball will be absorbed a more comprehensive solution
is a combination of the two with soft shapes designed to both reflect and
absorb sound and this is usually found in spaces like recording studios where
sound isolation is extremely important
there are even spaces so well isolated or sound proofed for special
applications that people have trouble spending a long period of time in them
claiming that the sound of their own heartbeat became frustratingly loud
yikes but since most of us probably don't live in recording studios or
soundproof Chambers for scientific research how exactly does sound
dampening really affect us in day-to-day life well sound proofing is actually
used in lots of things cars use sound
dampening in mufflers and resonators so we don't all sound like race cars in
traffic except for that one guy who lives on my block and they also use
insulating layers to reduce the sound made by traveling down the interstate
Nissan actually built an electric car that was so quiet that the sounds of air
moving over the car were discomforting to passengers and to solve this they
actually had to make specially shaped headlights to deflect air around the car
reducing noise and making that a method of sound dampening houses of course have
insul in the walls to help with climate control but also to assist with keeping
unwanted sounds out many modern houses use Windows made of multiple separated
layers with airspace in between to help them absorb sound and to prevent heat
transfer and if that's not enough there are actually special kinds of drywall
and even glue that you can buy so your living room won't sound like an echoey
Cavern when someone upstairs scoots a chair around many businesses actually
use special panels in the ceilings to help absorb unwanted sound which is
important for privacy reasons as well as just general workplace comfort and
speaking of the office we can also use computer cases with sound dampening foam
built right into them to block out the noise from cooling fans so then what's
next remember those three main ways to dampen sound well soon there may
actually be a fourth scientists are using quantum mechanics to produce new
materials for sound dampening that would allow for the redirection of sound
across a material surface without allowing any vibrations to travel
through it that means in the future it may take much less material to isolate a
space and it could potentially be used to reduce noise pollution in things like
busy cities airfields and even the
trains that are right next to our studio
speaking of not needing as much mass to absorb sound Mass drop has another one
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there to shop so thanks for watching guys if you liked this video click that
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