Are headphones destroying our hearing?
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I wear headphones all the
time recently I've been wondering if all
that listening is bad for me and this
led to a full-on spiral where I learned
the horrifying statistic that over a
billion young adults are at risk of
permanent avoidable hearing loss am I
one of those
billion in a time where we're giving our
ears less of a break than ever before
how can we make sure that we're not
losing our hearing long term and what
tools are out disposal to ensure that we
can minimize that damage power
[Music]
on headphones are not necessarily bad
like you know if you if you wear
headphones you're not automatically
going to develop hearing loss that's Amy
Saro I'm a doctor of Audiology so I
often go by Dr Amy Dr Amy explained to
me just how fragile our hearing is it
all has to do with these tiny hair cells
in our ears so when your hair cells are
healthy they stand up kind of like a
field of wheat and when the sound comes
through it looks like a tornado has come
through and they're all twisted up if
you're lucky they're able to sort of re
build themselves back straight up nice
and Tall but if you do that often enough
or if the sound is loud enough the
damage is permanent permanence in the
sense that those hairs are bent out of
shape forever and your hearing doesn't
come back not naturally nor do we have
treatments that can reverse the effects
of it this permanent damage is caused by
both duration and loudness which is me
measured in DB and it works on a
logarithmic scale which means if you're
listening to something at 85 DB and then
you raise the volume to 88 DB you've
actually doubled the loudness even
though it's such a small shift and this
is where things can quickly get
dangerous because we're often listening
louder than we realize a lot of times it
was 110 DB or it was over 100 DB and
it's easy to do because you turn the
volume up when you like a song and you
don't realize how loud that is
especially if you're trying to over
power the sound of a train or the buzz
of a coffee shop or your neighbors
mowing their
lawn so for context the US Department of
Labor recommends no more than 8 hours of
85 DB exposure to be considered a safe
working environment if you dig into your
settings on your phone you can limit
your volume to certain decel threshold
but if doing so prevents you from
hearing clearly well maybe you can lower
the volume of the world around you power
on the sound you're hearing is coming
from this device which is meant to
record what you'd actually hear if you
were in this space and if you were using
these headphones
power now if I'm honest I always thought
that noise cancellation was kind of a
marketing tactic you know like a neat
feature that was pretty cool but not
100% necessary the more I talk to
experts the more I realize that it's
actually a protective line of defense in
noisy environments there are two types
of noise cancellation passive noise
noise cancellation which is when
something is physically blocking the
sound from coming in and active noise
cancellation power on this is when the
headphones have mics that can listen to
the sound of the environment for
Simplicity sake let's visualize this as
a singular wave the headphones hear that
wave analyze it and then generate a
sound wave that's the exact inverse of
it in anti-wave if you will when you put
the two together you get
silence or close to anyways our
environment is much more complicated
than one wave there's tons of different
Dynamic sounds happening all at the same
time noise cancelling headphones are
best at removing persistent low
frequency hums anything in the 1,000 HZ
range or below think airplane turbines
trains engine noise but that doesn't
mean no sound gets in what's not going
to work well with that are higher
frequency sound so these would be like
birds chirping or a sudden loud sound it
doesn't have a chance to analyze and you
know decide what to do with that so
usually the sound is just going to come
through and when the world still seems
too loud but like emotionally speaking
sometimes I find it helpful to pause
take a second and maybe even find
somebody to talk to and that's where the
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now time to get back to the
video Power
on creating silence in an otherwise
noisy environment feels like magic but
it also leads to some weird questions
like does noise cancellation have volume
in other words if we're pumping an anti-
sound wave to create silence are our
brains interpreting into silence while
our ear hair cells are still getting
wrecked in a quiet tornado if it's
working properly it will not produce a
sound my name is Luke Keller and I'm a
professor of physics and astronomy at
Etha College you can think about it
farther up this stream at the eardrum is
bouncing back and forth in response to
sound waves but if they're canceled it's
not moving there's no vibration to
transmit to the to the inner ear so it
it it is literally making the sound go
away there's no negative effect the
cancellation happens completely in the
electronics not in your head so noise
cancelling actually does remove the
sound leaving our ear hair cells largely
unaffected and that's true of just about
any pair of headphones that have noise
cancelling so don't feel obligated to
get the most expensive best ones any
halfway decent pair will work well
enough to protect your ears but it is
important to note that noise cancelling
headphones don't work on everything like
if you go to a concert or need to
operate a jackhammer there are way
better ways to protect your ears but the
important thing is that we should be
making a conscious effort to protect
them we think about putting on sunscreen
and we can see when we have a sunburn
but noise damage is invisible so we it's
up to us to be thinking about it to be
mindful of it and uh to save our ears
[Music]
Key Vocabulary (50)
toward
"Go to school."
belonging
"Cup of tea."
also
"You and me."
inside
"In the house."
specific
"That book."
A third-person singular pronoun used to refer to an object, animal, or situation that has already been mentioned or is clear from context. It is also frequently used as a dummy subject to talk about time, weather, or distance.
A function word used to express negation or denial. It is primarily used to make a sentence or phrase negative, often following an auxiliary verb or the verb 'to be'.
A preposition used to indicate that something is in a position above and supported by a surface. It is also used to indicate a specific day or date, or to show that a device is functioning.
Used to refer to the person or people that the speaker is addressing. It is the second-person pronoun used for both singular and plural subjects and objects.
A preposition used to indicate a specific point, location, or position in space. It is also used to specify a particular point in time or a certain state or activity.
Used to identify a specific person, thing, or idea that is physically close to the speaker or has just been mentioned. It can also refer to the present time or a situation that is currently happening.
A coordinating conjunction used to connect two statements that contrast with each other. It is used to introduce an added statement that is different from what has already been mentioned.
The word 'we' is a first-person plural pronoun used to refer to the speaker and one or more other people collectively. It is used as the subject of a sentence or clause.
A coordinating conjunction used to connect two or more possibilities or alternatives. it indicates that only one of the options is likely, required, or true.
Used to refer to the whole quantity or amount of something, or to every member of a group. It indicates that nothing has been left out from the total being discussed.
Description
Here’s how to protect your ears. This video is presented by BetterHelp. Head to http://betterhelp.com/voxvideo for 10% off your first month. BetterHelp doesn’t have a say in our editorial...
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