The acoustic lasers, SASERS can make many things possible.

Sound amplification by stimulated emission of radiation (SASER) can be an excellent tool for acoustic systems like acoustic communication. Because SASER sends its beam in the form of atoms or molecules. It makes it possible to make systems where people or computers can exchange information using acoustic waves.

Acoustic waves can clean surfaces. And if their energy is high enough, they can break any material. That they face. The acoustic systems can make atoms or other particles between those loudspeakers and then lasers and ion systems can drive energy to them.

That is unable to hear from the sides. Because information travels in coherent acoustic waves it makes eavesdropping very hard. The acoustic lasers are suitable for sonar systems. They can be used to lift objects from the ground as the tractor beam. Those beams can act as very highly accurate sonar systems.

They can move objects on layers. The highly accurate high-power acoustic waves can also make submarines move. The system can drill holes in the water in front of the craft. And then the channel can pull a submarine in it.

SASER and aviation.

Sound amplification by stimulated emission of radiation (SASER) can be the tool that brings new winds to aviation and hypersonic flight. The aircraft can use the SASER system to start the RAMJET engine in a stable position. The SASER shoots sound waves through the RAMJET engine chamber.

The SASER beam makes low pressure in the chamber. That makes airflow backward. The air speed of 800 km/h is enough with Ramjet engine ignition. Then the system starts the fuel injection. If that beam is laser-accelerated or some EM systems like microwaves increase its speed, the air can flow so high that the SCRAMJET can make the stall-start. This kind of system can assist electric jet engines and hypersonic electric jet engines.

And then that system increases pressure and temperature in the engine chamber. And that system can make it possible to start the RAMJET on the ground. In the engine, SASER can also push the gas back from the exhaust tube. And that makes it possible to create a system, that drives exhaust gas backward.

Above: Ramjet engine. The SASER can make a vacuum in the engine chamber that makes airflow backward. When air speed is about 800km/h the fuel will inject into the chamber.

In some ideas, the SASER systems can be used to make the acoustic levitation beam. The system can be the acoustic crystal in the chamber. The acoustic system can form the "cold jet engine" that pushes craft up and forward using acoustic pressure waves. When the other system drives emergy that phonon crystal, which can be the artificial diamond or some other mono-atomic structure, that system can make the pressure waves in the chamber.

Those pressure waves can make the system possible to levitate the object. In some versions, the SASER systems can be used to push aircraft or rockets up. And the thing is that those aimed acoustic beams are not visible at the sides. This kind of system makes it possible to create so-called silent aircraft or rockets. The system can push those crafts up from below. Or it can be in the aircraft.

https://en.wikipedia.org/wiki/Phonon

https://en.wikipedia.org/wiki/Ramjet

https://en.wikipedia.org/wiki/Sound_amplification_by_stimulated_emission_of_radiation

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