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level, and most of these
are damaging, at least if you
listen to them long enough.
Obviously, gunshots,
firecrackers are very damaging.
Those sounds are in
excess of 120 dB.
So a single gunshot, if
it's close to your head,
can be damaging.
So we had-- we're going
to have an example of that
in just a minute.
Some of these sounds
are more moderate,
around the region of 100 dB SPL,
for example, a chainsaw, a leaf
blower, the symphony
orchestra here.
So everybody goes to
the symphony, right?
So obviously,
these things depend
on how close you are
to the object that's
generating the sound, right?
So if you go to the
Boston Symphony,
you're not going to
endure a hearing loss.
But if you have good
seats and are looking down
on the symphony, you'll see
that a lot of the woodwind
players who are sitting
right in front of the brass,
for example, the
trumpet players, they
have a little
screen behind them,
a plexiglass screen that's
pretty invisible unless you're
looking for it.
That causes a sound shadow,
and so it protects their ears
from the blast of the bras.
And I've also been
in the symphony
where, sometimes, the woodwind
players would actually
put in ear plugs when
there's a big brass solo,
and brass is blowing like crazy.
And then after that big
solo, they take them out,
and they play their
own little solo.
So professional
musicians are obviously
very worried about
their hearing.
And it can be, if you're
close to a trumpet or a brass
instrument, deafening-- or
in front of a big timpani