difference between its free field response and its pressure response and
is
suitable
for
either
type
of
application.
The
most
important
considerations when choosing a microphone are its
sensitivity.., its frequency response, and its omnidirectivity. Generally
the
smaller
the
microphone
is,
the
wider
is
its
frequency
range and
the
better
its
omni-directivity,
but
the
lower
is
its sensitivity. This means
that
the
smaller
microphones are best suited
for
measurements in more inten9e sound fields.
Also
the
smaller physical size
of
the
microphone produces less
turbulence
in
high wind velocities.
6.2.7. Microphone
Adaptors
The
Half inch
to
Quarter inch and
Half inch
to
Eighth inch microphone
adaptors
UA 0035 and UA 0036
respectively are used
to
connect
Quarter inch or Eighth inch micro-
phones
to
the
input stage
or
extension
rod.
6.2.8. Nose Cones
::c:s
±It
Fig.6.20. VA 0035
Fig.6.21. VA 0036
The
nose cones UA
0051/52/53
are for use with
one
inch, half inch and
quarter
inch microphones respectively.
Fig.6.22. VA 0051/52/53
They
are designed
to
reduce
the
noise produced by
turbulence
when
microphones are exposed
to
high wind speeds and are especially effective
with
constant
windspeeds and fixed directions as
for
instance
in
wind
tunnels.
83
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