107
SVANTEK 977W User Manual
The
Averaging
position enables the user to
activate the averaging of the reverberation
time results from several measurements.
When this option is switched on the
Averaging
position appears on the
RT60
bar plot.
To make averaging of the new results with
the results calculated earlier the user should
select the field
Averaging
and press the
<ENTER>
push-button, select in the
confirmation window
Yes
and press
<ENTER>
again. In the field
No.: x
, the
value
x
will be increased by one and the
symbol
will inform that the results have
been averaged.
=>
=>
<Start>
<ENT>
<ENT>
When the averaging is
On
the additional columns appear in the RT60 result
table, named:
AEDT
,
A20
,
A30
and
A.User
.
To clear averaging the user should
select the field
No.: x
and press the
<ENTER>
push-button, select in the
confirmation window
Yes
and press
<ENTER>
again.
<ENT> .. <ENT>
The
Smoothing
position enables the user to set the number of samples, which
are taken to averaging process of the sound pressure level decay curve.
Note: this parameter influences the reverberation time results.
The
parameter can be set in the range
0
÷
15
with
1
sample step (default value is
3
samples).
The
Noise Mar.
position enables the user to set the margin value to the
calculated noise level (for more detail see
Appendix H
). This parameter can be
set in the range
0
÷ 20 dB
with
0.1 dB
step (default value is
10 dB
).
Note: If the measurement must fulfill the ISO 3382 standard requirements the noise margin is
required to be set to 10 dB (or greater value).
