
A The sound
of
Ba
leen
Wha
les is the
loudest produced
by
any
a
ni
ma
l
on
earth and travels for many k
il
ometres
underwater. It may
be
used for long-
range contact, meeting
ca
ll
s,
in
their
search for mates, as a greeti
ng,
threat or i
nd
ividual identification.
Th
ey
produce mostly l
ow
-frequency
sounds, which are for long-distance
communication, orientati
on
and
navigation.
W
ha
le communication
occurs through
low-frequency moans,
as
we
ll
as
hi
gh-frequen
cy
w
hi
st
les
that
are produced
by
the whales.
Wha
les also communicate
by
means
of
body language such as slapping
their ta
il
s.
Wha
le noises such as
forceful spouts
of
water may signal
annoyance, and the slapping
of
flippers indicates excitement or
aggression.
B
Wha
les use beautiful l
yr
ical sounds
ca
ll
ed
whale song to commu
ni
cate
with each other.
As
whales are
so
large and powerful, they make very
loud sounds
that
can
be
heard for
many
k
il
ometres.
Wha
les
have
been
known to generate about
20
,
000
acoustic watts
of
so
un
d
at
163
decibels.
C Some whale species produce a
pattern
of
regular and predictable
whale
sounds, the most
no
table
being the
Hum
pback
Wh
al
e.
It has
been compared with human musi
c,
with these creatures being the
'composers'.
On the other hand,
most toothed
whales do not produ
ce
whale son
g,
but
in
stead p
ro
du
ce
rapid bursts
of
high-frequency c
li
cks
and
wh
istles. Single clicks are known
to
be
used in echolocation ; however,
a
co
ll
ection
of
clicks together is for
communication.
Male Humpback
Wh
ales make these sounds dur
in
g
Whale
son
the mating season, w
hi
ch
suggests
that
the purpose of their songs is to
se
lect a mate. It is unknown whether
it is
also their means
of
defining
territory or even
fl
irti
ng
between
ma
les and females.
D Whales occupying the same
geographical location tend to sing
similar whale songs, only varying
them s
li
ghtl
y.
H
owever,
whales
f
ro
m different areas sing different
songs. A study over a period of
19
years found
that
the same song
combinations never occurred,
suggesting
that
whales
ne
ver reuse
o
ld
song patte
rn
s.
Wh
ales
in
on
e
area si
ng
the same song at
any
po
int
in time, a song which
constantly and
slowly changes over time.
Over
any
gi
ven
period, one so
ng
will start with
increasing frequency but may
sl
ow
ly
flatten
to become more
co
nstant. A
Questions
1-6:
Matching
information
wha
le will typically repeat the same
phrase
of
song over a
nd
over aga
in
for two to four minutes
at
a time.
Th
is is known as a theme,
of
which a
co
ll
ecti
on
makes a song.
The
whale
repeats the same song,
wh
i
ch
may
last up to
30
minutes and
eve
n for
days at a time.
E
The
mechanisms used
by
whales
to produce sound vary from one
species to another. Most
wha
les
produ
ce
whale sou nds
by
pass
in
g
air through a structure in the head
ca
ll
ed
the phonic
li
ps.
The
li
ps vibrate
as the air passes through them and
these vibrations can be
consciously
controll
ed
with great sens
it
ivity. Th
ey
pass th
ro
u
gh
to the melon
of
the
head, which shapes and directs the
sound into a beam for
echolocation.
The air may
be
recycled back to
be
used for sound creati
on
yet aga i
n,
or
passed out through the
blowhol
e.
A
ll
toothed whales, except for the Sperm
Whale, have two se
ts
of
phonic
lips; therefore they are capable
of
making two sounds independentl
y.
Baleen W
ha
les do not have phonic lip
stru
ct
ures,
on
ly a larynx that appears
to
pl
ay
a
ro
le in producing whale
sound.
F Mari
ne
creatures are largely
dependent on sou
nd
for
communicati
on
and sensation,
as their other senses are
li
mited
due to their watery habitat.
Environmentalists appear to be
concerned about
whales
be
ing
harmed and n
ot
be
in
g able to find
mates because
of
the increased
noise levels at sea caused
by
ships
and other sources.
The
Humpback
Whale songs for instance are often
disrupted and this causes immense
panic
in
the grou
p.
The reading
pa
ssage
ha
s six
paragraph
s,
A-F
.
Which
paragraph
contains
the
following
information?
You
ma
y use any letter
more
than
once.
m
Communication
and
language
1 a detailed description of whale song
......
....
..
.
2
the
possible
connection
between
wha
le
communication
and
breeding
3
the
fact
that
noise pollution
ma
y
disrupt
the
mating
activities
of
whales
4 different
method
s
of
communic
ation
among
whales
..
....
.. ....
.
5 a reference to
the
effect
on
wh
ales
of
human
activity
..
.....
..
..
..
6
the
fact
that
s
ounds
made
by all species
of
whales are very
loud
..