VT USA-168A/B Real Time Underwater Sound Analyzer Manual Rev. 1.5
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Virtins Technology
Sound Card
Oscilloscope
Sound
Card
Spectrum
Analyzer
Sound
Card
Signal
Generator
Multi-
Instrument
Lite
Multi-
Instrument
Standard
Multi-
Instrument
Pro
Transfer Function /
Impedance
Analyzer
Impulse Response
In
tra
-F
ra
m
e
P
ro
ce
ss
in
g
Frequency
Compensation
Frequency
Weighting
Remove DC
Smoothing
via
Moving Average
(Linear/Octave)
In
ter
-F
ra
m
e
P
ro
ce
ss
in
g
Peak Hold
Linear Average
Exponential
Average
P
ara
m
eter M
ea
su
re
m
en
t
THD,THD+N,SNR,
SINAD,Noise
Level, ENOB
IMD/DIM
Bandwidth
Crosstalk
Harmonics & Phase
Energy
in
User
Defined Frequency
Band
Peak
Detection,
SFDR, TD+N
Wow & Flutter
*
Sound Loudness
Sound
Loudness
Level
Sound Sharpness
Sound Articulation
Index
Total Non-Coherent
Dist Noise
GedLee Metric
FFT
FFT
Size
128~32768
FFT
Size
65536~4194304
Intra-Frame
Average
Window function
Window Overlap
Oth
ers
Octave
Analysis
(1/1, 1/3, 1/6, 1/12,
1/24, 1/48, 1/96)
Linear / Log Scale
for X and Y
Peak Marker / Label
Signal Generator
Wav
efo
r
m
Sine
Rectangle
Triangle
Saw Tooth
