Adding Explosion Sound Effect

I followed the FPS Tutorial until I got to this,

'Sound
effects

Our
game
world
has
been
a
little
quiet
so
far,
let’s
add
a
sound
effect
to
our
explosion

effect.

First
let’s
assign
an
audio
clip
to
the
Explosion
prefab.

To
allow
the
Explosion
object
to
be
able
to
accept
an
audio
clip,
we
add
the

Audio
Source
component
to
it
from
the
main
menu
(Component
­>
Audio­>

Audio
Source).
You’ll
notice
one
of
the
properties
of
this
component
is
the

Audio
Clip.

Assign
“RocketLauncherImpact”
to
the
Explosion
prefab’s
Audio
Clip
exposed

variable.
Unity
can
play
many
different
audio
formats.

Run
the
game
again
and
our
explosion
sound
effect
should
be
heard
when
each

missile
impact.’

I did what it said except I used my own audio clip. When I tested the game I didn’t hear and explosion.

How can I fix this?

Is it set to play on awake and is the volume high enough?

Do you have an audio listener in your scene as well? If not, attach one to your camera. Component>Audio>Audio Listener.