Perpetual Self-Powered-Overunity, just using sound, no electricity ?

[unsure]

Could it be possible to do the 'Larsen effect' ( https://en.wikipedia.org/wiki/Audio_feedback ) as Perpetual Self-Powered-Overunity,  just using sound, no electricity ?

Sound ( not using electricity ), looped in some physical object / objects, achieving Perpetual Self-Powered-Overunity .

- Maybe there's some rocks / materials, that amplify sound when sound bounces of them, or passes through them.
- There seem to have been reports of rocks flying / levitating in the sky like ufo s, etc .
- Before modern techniques to levitate objects using sound, there was claimed levitation of rocks and other things just using sound ( no electricity ).
- Inside some hollow objects, the echo must be very good,  resonance ?, what if the hollow object was made of a special material that may amplify sound when sound bounces of them, or passes through them .

I guess this is the same as resonance .

[AreYouSure?]

Could it be possible to do the 'Larsen effect' ( https://en.wikipedia.org/wiki/Audio_feedback ) as Perpetual Self-Powered-Overunity,  just using sound, no electricity ?

Sound ( not using electricity ), looped in some physical object / objects, achieving Perpetual Self-Powered-Overunity .

- Maybe there's some rocks / materials, that amplify sound when sound bounces of them, or passes through them.
- There seem to have been reports of rocks flying / levitating in the sky like ufo s, etc .
- Before modern techniques to levitate objects using sound, there was claimed levitation of rocks and other things just using sound ( no electricity ).
- Inside some hollow objects, the echo must be very good,  resonance ?, what if the hollow object was made of a special material that may amplify sound when sound bounces of them, or passes through them .

I guess this is the same as resonance .

Unsure,

Sound is powerfull thing.
Sonoluminensence for example.

[Floor]

Amplification is not what many people seem to think it is.

Amplification is not an over unity event.

  example
Electronic amplification...
of a sound, is a process in which a COPY of the original sound is created
electronically. 

If that copy, is played through a speaker at a louder volume, than the original
sound was input as, then the sound has been "amplified".

The replicated sound is then louder, only because electrical energy, was input
during the process.
     also
Sonic / mechanical,  reverberations of a single sound, do not increase the energy of
that sound.

  best wishes
   floor