Audio Analysis Functions - Phonic PAA3 User Manual

AUDIO ANALYSIS FUNCTIONS

The following section contains information
concerning acoustic analysis, and illustrates how
to use the PAA3 to measure various properties
of your audio.
RTA (Real Time Analyzer) - Accoustic
This function analyzes the audio received through
either the built-in mic or Line In connection, divided
into 31-bands at 1/3 octave intervals, and displays
the relevent information on a bar graph that shows
the decible level of each band of sound from 20 Hz
to 20 kHz in four different response times (35 ms,
125 ms, 250 ms, and 1 sec) and in three weighting
types (A weighting, C weighting and Flat). For
more info on response times and weighting, please
consult the appropriate sections.
Procedure：
1. After the start up sequence of the PAA3 is
complete, the real time analyzer will appear
on the LCD screen.
2. Go to the SETTING menu to set the
appropriate weighting, level range, response
time, or other relevant properties.
3. Select VALUE from the main menu to enter
RTA mode.
4. Press ENTER to freeze measurement data.
Press ENTER again on the highlighted
VALUE to view the value of each center
frequency.
5. Use the LEFT/UP and RIGHT/ DOWN
buttons or simply scroll the JOG control
to view the level of dB SPL in real-time for
the center frequency of all 31 bands. The
default readout is the ALL FREQUENCY
level. Beneath you will find two readouts:
the numbers in the left column display
the frequency while the numbers in the
right column display the frequency levels.
The graphic shown indicates that the user
has set the level range at 50~110 SPL, A
weighting. The max level during the time
PAA3X
of measurement is 105.5 dB, The user
is reading at 1 kHz, which has a dB SPL
of 102.8. If you would like to store the
measurement data in the memory of PAA3,
go to the STORE menu. Users can save
the measured spectrum data into one of the
ten memories. Please refer to MEMORY/
STORE for more information.
6. Scroll through the various values located
in the 'Hz' box until you come to a flashing
ESC. Press enter to exit RTA mode.
SPL (Sound Pressure Level) Meter
This feature of the PAA3 gives users an accurate
measurement of the overall "loudness" of their
sound, measured in decibels (dB). This is a true
RMS-measurement, using standard display time
average, and standard A, C, and Flat weightings.
RANGE WEIGHT
50 ~ 110 SPL
Procedure：
1. Enter the SPL/LINE menu and set the
measurement unit to SPL.
2. You may select a range level, weighting,
response time or a maximum level by going
into the SETTINGS menu, then onto the
appropriate menus. The selected values of
these options will be displayed above the
RTA on the PAA3's default screen.
3. On the main RTA display, hold the ENTER
button for approximately 2 seconds to
activate the SPL screen. Press the ENTER
button once to exit.
NB：You can easily refresh the Max SPL value
by holding both the ← left and → right keys
simultaneously for at least one second.
MAX
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