bb090813.book : 2236-ch2 Black 2
Chapter 2 – An Example Measurement
Introduction
2 – 2
Brüel & Kjær
Precision Integrating Sound Level Meter Type 2236
User Manual
2.1
Introduction
This chapter guides you through the basic functions of the
sound level meter by instructing you on how to make a noise
measurement in a free sound field. You can find further in-
formation on the various steps in the relevant sections of the
User Manual.
It is a good idea to have the fold-out back cover open so that
you have an annotated illustration of the sound level meter
in front of you while you follow the example measurement.
We have assumed that the sound level meter is switched off
and has not been used before following these instructions. If
it has, ensure that you are using the default set-up (see
section 3.3) before following the steps below.
We have also assumed that you will calibrate the sound level
meter with Sound Level Calibrator Type 4231 and that you
will print out your results using Serial Printer WQ 1138.
2.2
Making a Measurement
Switching On
1.
Press
.
The sound level meter switches on. After a self-test, the
sound level meter is set up in Pause mode in the default
set-up. The quasi-analogue scale shows the input signal
to the preamplifier and displayed parameter shows the
current SPL. The buffer, log and memory are empty.
Since the displayed parameter (SPL) is an RMS param-
eter, you can see the frequency weighting of the RMS
signal (shown in the bottom right-hand corner of the
screen). See the fold out back cover for more details of
the main screen.
