Fallacies in Lee?Tseung Lead Out theory &Veljko Milkovic 2 Stage Mech amplifier

[fritz]

I must admit though that the concept of impedance matching is new to me 

Ok, lets start with an oscillating string.
Take a string, fix it at the endpoints.
Depending on the tension you will see a standing wave with varying frequency f.
The oscillation is terminated on both ends (low - almost zero impedance - in this case we call impedance the factor formed of displacement(moved mass) divided by torque at this point.
In the middle of the string, the displacement is maximum - the impedance is maximum, the torque is lowest.
Now you couple this swinging string with wire or whatever to another resonator which can be another string.
You will find out that you can transfer the most energy between those 2 systems if they are connected at the points where they have the same impedance.
Take a violin - the bridge couples the energy at the right point into the resonator.
I have a kind of cheap "electric" violin - and the problem here is that the resonator normally "sucks" energy from the oscillating string. Because an electric violin has no resonator - I have the problem of lots of displacement - which finally lowers the tone if too much excited.

In RF you have the same story, in this case the impedances is formed of voltage and current - or electrical vs. magnetic field.

In Air-Acoustic - same story.
In the nearfield of a subwoofer - you have lots of displacement / wind.
It takes a few meter until this wind ends up as stable soundwave.
Again the energy is composed/represented in 2 components forming an impedance.

Every time an oscillating energy is forced from one impedance to another you experience reflection if the 2 impedances are not the same.

You can even apply that to optics (.....) and lots of other things.

Impedance matching optimizes the efficiency - but is never OU.

In case of the Milkovic device, the lever matches the impedance between the low weight pendulum with lots of displacement to high weight hammer with less displacement.

If the setup is optimized - both sides can exchange energy with minimum losses.

rgds.

[fritz]

In case of the Milkovic device, the lever matches the impedance between the low weight pendulum with lots of displacement to high weight hammer with less displacement.

In the Milkovic setup, the hammer operates at an even fraction of the driving pendulum (frequency).
A non-sinusodial or even "square" part of this oscillation (if hammering) contains a high amount of 2nd order harmonics which (can be) are reflected and feed back to the driving oscillation.