Holographic imaging

Roger,

I understand your descriptions of Doppler effect in regards to sound waves propagating outside of the amp, nothing new there, but not how the same thing occurs in the electrical domain within the amp.

Atmasphere's questions seem relevant.

Wikipedia section on amplifiers talks about a lot of things including use of negative feedback but Doppler is not mentioned.

Unsound, Tvad,

You’re right the concert hall was not meant to imply a change in perspective by switching seats. Just that it was convenient to illustrate changes in distance from the sound object and how it does impact the pitch as your movement occurs. And yes it would be below the threshold of human perception to actually hear a change in pitch as you are walking from front to back or vice versa. But the principal still applies. The 3 locations, front row, 10th row and 20th row represent relative settings in gain which if you were to “jump” between them would in fact throw off the perceived pitch.

Atmasphere,

Thank you for your response. The speed of the amplifier you refer to (slew rate) only addresses the “vertical” speed of the amplifier circuit. What I am referring to with velocity is the lateral or horizontal speed of the circuit. IOW my interest is in the manner that a given input signal travels from input to output and more importantly is it (the velocity) constant.

Regards,

Roger

Grant,

I can tell you from personal experience patents are a very expensive proposition. Once you have obtained a patent and its published it is open for all to see. A 20 percent change in the original design is often all that is nessasary to get around the original design. If you have the bucks to litigate well then you may have a chance. If you don't, then think twice about doing so. Electronic circuits sometimes are potted with material that disguise whats in side. If you remove the potting material you may destroy the design underneath. I suppose you could always x-ray the underneath. Also in prototype developement when the product is tested or any pre release publicity is issued describing the product in drawing or photos you have one year from the first disclosure date to file for patent protection. Tom