VT USA-168A/B Real Time Underwater Sound Analyzer Manual Rev. 1.5
www.virtins.com 19 Copyright © 2021-2022 Virtins Technology
Virtins Technology
2 Specifications
2.1 VT USA-168A/B Overall Hardware Specifications
USA-168A
USA-168B
Frequency Range
20Hz ~ 4kHz (± 4dB)
20Hz ~ 10kHz (± 5dB)
Sound Level Measurement
Range
48dB ~ 161dB (typical)
(Old Version: 63dB ~176dB)
59dB ~ 172dB (typical)
(Old Version: 75dB ~ 188dB)
Useful Frequency Range
(<10Hz) ~ (>100kHz)
(Sensitivity drops about 45dB
@100kHz)
(<10Hz) ~ (>100kHz)
(Sensitivity drops about 44d
B
@100kHz)
Operating Depth
< 80m
Sampling Rate
44.1kHz, 48kHz, 88.2kHz, 96kHz
Bit Depth
24 bit
Number of Input Channel
1
Direct Monitoring without
Passing Through
Computer
Supported
Frequency Accuracy
0.01%
Frequency Weighting
Flat, A, B, C, ITU-R 468
Time Weighting
Linear, Exponential
(Equivalent continuous sound level (
Leq
) fully complies with
IEC61672)
Octave Analysis
1/1,1/3,1/6,1/12,1/24,1/48, 1/96
(Complies with IEC61260)
Other Functions
Much more functions are described in the software manual.
USB interface
USB 2.0, driver installation required
Input Isolation
No (Isolation can be achieved through a USB high speed
isolator)
Power Source
USB bus power (Type B), DC 5V power supply (Micro-B), or
2×AA batteries
Power Consumption
Max. 5W
System Requirements
Windows 8/8.1/10/11, 32 bit or 64 bit.
Minimum Screen Resolution: 1024 × 600
Calibration
Not calibrated individually. Nominal value is used instead. Not
recommended for absolute sound level measurement.
2.2 Hydrophone Specifications
USA-168A
USA-168B
Transducer Type
Plate bender
Dual plate benders,
mechanically balanced
Frequency Range
20Hz ~ 4kHz (± 4dB)
20Hz ~ 10kHz (± 5dB)
Sensitivity
-165dB re: 1 V/μPa (Typical)
(Old Version: -180dB)
-176dB re: 1 V/μPa (Typical)
(Old Version: -192dB)
Useful Frequency Range
(<10Hz) ~ (>100kHz)
(Sensitivity drops about
45dB @100kHz)
(<10Hz) ~ (>100kHz)
(Sensitivity drops about
44dB @100kHz)
