Photo-acoustic systems can revolutionize sonar technology.

“The RUS-PAT (rotational ultrasound tomography, RUST, combined with photoacoustic tomography, PAT) technique combines the benefits of ultrasound imaging for seeing tissue structure with those of photoacoustic tomography for revealing function of the vasculature. Credit: Yang Zhang” (ScitechDaily, Scientists Develop a New Way To See Inside the Human Body Using 3D Color Imaging)

Photo-acoustic systems can be useful for many purposes. From civil to military systems. The photoacoustic uses lasers or other forms of electromagnetic radiation to create acoustic waves. In those systems, the electromagnetic system. Stresses atoms or molecules, and then those things send acoustic waves around them. The photo-acoustic loudspeaker is basically a chamber. There are things like fullerene balls that hover in gas like air. When the laser system starts to send energy impulses to those fullerene bites. They send resonance to the gas around them.

The photo-acoustic phenomenon can be used in computer tomography. But. Those systems can also be used in the new types of sonar systems. The idea is that a laser beam is sent to water. That system causes a sound effect that travels in water. The observation system can observe how those pressure waves behave when they travel in water. The photo-acoustic system allows aircraft or even satellites scan large areas with new accuracy. 

The system can be used. A hydrogen-oxygen (water) laser that sends radiation that causes resonance in water. The water laser uses super-clean iced water in the laser element. The satellite or aircraft can send that radiation into water. And then high-accuracy lidar or quantum radar can see those reflections. The laser system and photo-acoustic devices can also form long-standing monotonic sound. That sound can be used in the military. And civil applications. 

The acoustic systems, or photo-acoustic systems. Make it possible. To give new types of treatments for things like infections or cancer. The system sends microparticles into harmful cells. Then, the chamber is filled. With similar particles. The system starts to stress those particles with lasers. And then that causes resonance in those particles in the cells. That resonance forms pressure waves in those cells. And that destroys their internal organs. These kinds of systems can be useful in military and medical purposes. 

https://scitechdaily.com/scientists-develop-a-new-way-to-see-inside-the-human-body-using-3d-color-imaging/