The core element of any sonar. It converts electrical energy from the transmitter into acoustic pressure waves that propagate through water, and reconverts returning sound energy into electrical signals for analysis. Transducers vary by material (piezoelectric ceramics are common), shape, frequency range, and beam pattern. Their design determines range, sensitivity, and image sharpness.
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.