The life is an eternal replay: the auxetophone
http://www.auxetophone.com/History.html
http://www.auxetophone.com/Operation.html
http://www.angelfire.com/nc3/talkingmac ... phone.html
and a full demonstration:
http://www.youtube.com/watch?v=J7SV65DFNy8
(forget the distortion, but at that time it was a big improvement)
The ancient saga of the XIXth century 'ipod' (or jukebox)
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The ancient saga of the XIXth century 'ipod' (or jukebox)
I cannot imagine why nobody though on this before, including myself? It is so simple!...
re: The ancient saga of the XIXth century 'ipod' (or jukebox
p_f, this is a great device you found!
A ''new'' stuff for me!
In the 70`s I read about the ''questions'' about how to deal with a loud-speaker and the fine technic troubles for ''fidelity''.
Question is that the loud-speaker ''hurts'', or touch the air to make sound waves, BUT this happens in both directions, to front and to hear side.
Fabricants used to make strong wooden boxes, full of sound isolators, specially the fiber-glass woven.
This means that the front sound is desired but the hear one, caused by L-S return, should be ''killed'' and not desired.
With a bad ''isolation'' the ''two sounds'' used to be mixed and the quality will fail.
Still is the 70's I have been in a brazillian factory with the offer of two ideas to be searched.
A very ''smart friend'' and technician guy even couldn't wait to my complete description, or proposition... he got blocked and even not able to understand me...
My proposition was to make a sealed air pressurized back side sound-box OR to use a kind of plastic plus water bubble also in back side together to a reflective surface inside.
What is expected to happen with this?
The undesired sound would ''travel'' to front so fast that should be impossible to be ''detected'' by human ears and the sound power should double.
The second idea would to search a fully pressurized sound box, maybe using a complete ''water ambient'' for the L-S.
When I say that many people are allergic to inventors, I know very well what I mean.
All best! Murilo
A ''new'' stuff for me!
In the 70`s I read about the ''questions'' about how to deal with a loud-speaker and the fine technic troubles for ''fidelity''.
Question is that the loud-speaker ''hurts'', or touch the air to make sound waves, BUT this happens in both directions, to front and to hear side.
Fabricants used to make strong wooden boxes, full of sound isolators, specially the fiber-glass woven.
This means that the front sound is desired but the hear one, caused by L-S return, should be ''killed'' and not desired.
With a bad ''isolation'' the ''two sounds'' used to be mixed and the quality will fail.
Still is the 70's I have been in a brazillian factory with the offer of two ideas to be searched.
A very ''smart friend'' and technician guy even couldn't wait to my complete description, or proposition... he got blocked and even not able to understand me...
My proposition was to make a sealed air pressurized back side sound-box OR to use a kind of plastic plus water bubble also in back side together to a reflective surface inside.
What is expected to happen with this?
The undesired sound would ''travel'' to front so fast that should be impossible to be ''detected'' by human ears and the sound power should double.
The second idea would to search a fully pressurized sound box, maybe using a complete ''water ambient'' for the L-S.
When I say that many people are allergic to inventors, I know very well what I mean.
All best! Murilo