Settings - Phonic PAA3 User Manual

SETTINGS

The sub-menus of SETTING include WEIGHTING,
LEVEL RANGE, MAX LEVEL, PEAK HOLD,
RESPONSE TIME, and CALIBRATION.
Weighting
Any audio analyzer needs to be designed so
that it hears sound properties in the same way
as humans. Generally, the sensitivity of human
hearing is restricted to the frequency range of 20
Hz to 20 kHz. The human ear, however, is most
sensitive to sounds in the range of 500 Hz to 8 kHz.
The ear becomes progressively less sensitive to
sound out of this range.
To account for this limitation of human hearing,
many audio analyzers, including the PAA3,
incorporate a filtering of acoustic signals according
to frequency. This filtering (weighting type) is
devised to correspond to the varying sensitivity of
the human ear to sound over the audible frequency
range. The PAA3 comes with both A-weighting and
C-weighting standardized by the ANSI (American
National Standards Institute). A-weighting is
the most frequently used weighting type and is
used for measuring lower sound levels, while
Cweighting is best suited for higher sound levels.
The user can set the weighting for measurements
in dBu, dBV or voltage.
SETTING
WEIGHTING
FLAT
A
C
ESC
A 31 100 315 1K
Procedure:
Go to the SETTING/ WEIGHTING menu.
1.
Select an appropriate weighting for the
2.
measurement. A tick appears next to your
selection.
Press ESC to the previous menu.
3.
14
3.15K 10K
Level Range
The PAA3 has three different ranges for
measurements in SPL, dBu, dBV and voltage.
SPL: 30 ~ 9 0 / 50 ~ 1 10 /
dBu: - 50 ~ + 10 / -35 ~ + 25 / - 20 ~ + 40
dBV: - 52 ~ + 8 / - 37 ~ + 23 / - 22 ~ + 38
VAC: 5 m ~ 2 .45V / 14m ~ 1 4V / 77.5m ~ 8 0
SETTING
LEVEL RANGE
30 ~ 90 dBSPL
50 ~ 110 dBSPL
70 ~ 130 dBSPL
ESC
A 31 100 315 1K
Procedure:
Go to the SETTING menu, and proceed onto
1.
the LEVEL RANGE menu.
Select an appropriate level range for your
2.
measurement and press the ENTER button.
Press ESC to return to the previous menu,
3.
or hold the ENTER button for 2 seconds to
revert back to the RTA screen.
7 0 ~ 130
V
3.15K 10K
PAA3X