Keyphrases
Highway Construction
100%
Long Distance
100%
Auditory Warning
100%
Directional Sound
100%
Construction Work Zone
100%
Work Zone
40%
Warning System
40%
Time Delay
40%
Ultrasound-based
40%
Flat Panel Speaker
40%
Portable System
20%
Real-time Control
20%
System Development
20%
Power Supply
20%
High Directional
20%
Sound Level
20%
Available Technology
20%
Battery Power
20%
Suitable Technology
20%
Time Delay Control
20%
Flat Panel Loudspeaker
20%
Parameter Array
20%
Parametric Array
20%
Highway Work Zone
20%
All-frequency
20%
Engineering
Highway Construction
100%
Directional
100%
Construction Work
100%
Delay Time
60%
Flat Panel
60%
Power Supply
20%
Review Paper
20%
Installation Cost
20%
Highway Work
20%
Battery Power
20%
Sound Level
20%