RECORDING OF LOW FREQUENCY SOUND
If low frequency sounds are
to
be analysed,
they
are best recorded first
on
the
tape
recorder. Then frequency transformation etc. as described above
can be used. To record sounds lower
in
frequency
than
2 Hz,
the
B & K
Type
4146
microphone,
in
conjunction with
the
B & K Microphone Carrier
System Type 2631
will
be required and
is
shown
in
Fig.5.4.
The
4146
microphone has a guaranteed response down
to
0.1 Hz, and
is
suitable
for
investigating sonic boom, thunder,
and
other
low frequency sound
phenomena.
Fig.5.4
Low
frequency sounds
down
to
0.1
Hz
can
be
recorded with
the Microphone Carrier
System
Type
2631.
39
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