EasyManua.ls Logo

BRUEL & KJAER 2305 - Page 89

BRUEL & KJAER 2305
130 pages
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
acteristics
is
obtained.
For
description
of
the
Turntable
anti its
operation
,
the
reader
is
referred
to
part
Accessories
of
this
manual.
In
the
following
a
few
examples
on
the
application
of
the
Level
Recorder
adapted
to
polar
recording
are
given.
Directional
Characteristics
of
Loudspeakers.
With
the
measuring
arrangement
illustrated
in
Fig. 6.
25
the
directional
characteristic
of
a
tweeter
was
recorded
at
various
frequencies.
In
Fig
. 6.26
the
results
are
reproduced
.
The
measuring
equipment
consists,
apart
from
the
Turntable
and
the
Level
Recorder,
of
the
B & K
Beat
Frequency
Oscillat~r
(B.F.
O.)
Type
1013,
the
Microphone
Amplifier
Type
2603
and
the
Condenser
Microphone
Type
4133.
With
this
combination
a
frequency
range
of
200-40000
Hz (cis) is covered.
When
substituting
the
B.F.O.
Type
1013
with
for
instance
lhe
Type
1022 a
20--20000
Hz (cis)
frequency
range
will be
obtained.
The
measurements
were
carried
out
in
an
anechoic
chamb
er to
ensure
that
no
reflection
would
in-
fluence
the
measured
results
.
Fig. 6.26. Directional characteristics
of
loudspeaker measured
at
the
frequencies
1000
Hz (cis),
8000
Hz (cis) and
16000
Hz (cis).
The dotted curve is obtained
by
utilizing
the
pen lifting arrangement
in
combination
with
the
Two-Channel Selector.
88

Table of Contents

Related product manuals