Systems that use short, high-frequency pulses to reveal fine details of the seafloor or submerged structures. While their range is limited compared with low-frequency systems, they are essential for precise imaging of small objects such as cables, anchors, and debris.
Category
Core Acoustic Concepts
The Most Important Sonar Terms Explained
Acoustic Image
A visual rendering created by plotting sonar echoes by their intensity and time delay. Acoustic images resemble photographs but are generated by sound, revealing underwater scenes even in zero visibility.Acoustic Shadow
A dark or signal-void region behind an object that blocks the sonar beam. The length and shape of acoustic shadows help infer object dimensions and orientation, enhancing target interpretation.AUV (Autonomous Underwater Vehicle)
A self-navigating underwater robot that executes pre-programmed missions to collect sonar, imaging, or environmental data. It is used in deep-sea mapping, military reconnaissance, and oceanographic research where endurance and autonomy are required.