How to make a Music Electricity ( aka Standing Waves)?

[MarkE]

Hello MarkE,
                   but pi 3.24 is not the only pi value, pi is not a constant value. There is are different pi value for squaring the circle "geometry term" and a different pi value exist for outer space as well. For example I cold rolled a sheet of steel 1.2m wide 2.4m long by 3mm thick into a cylinder and it grew in length by over 50mm. Pi at 3.14 is good for drawing plans but not practical for real world engineering.

Best Regards
luc2010

Pi is the ratio of the length of a circle's circumference to its diameter.  "Taxicab" geometry artificially defines a path that incrementally moves towards and away from the circumference of a circle resulting in a contrived artificially long "path" length for the circumference.  Pi, and its approximation of 3.141592653590 is fundamental to all AC electrical engineering.  Your assertion that it is "not practical for real world engineering" is flat wrong.

[Pirate88179]

Pi is the ratio of the length of a circle's circumference to its diameter.  "Taxicab" geometry artificially defines a path that incrementally moves towards and away from the circumference of a circle resulting in a contrived artificially long "path" length for the circumference.  Pi, and its approximation of 3.141592653590 is fundamental to all AC electrical engineering.  Your assertion that it is "not practical for real world engineering" is flat wrong.

If it were not "practical for real world engineering", then the computer he is typing on would not work.

Bill

[CANGAS]

Hello MarkE,
                   but pi 3.24 is not the only pi value, pi is not a constant value. There is are different pi value for squaring the circle "geometry term" and a different pi value exist for outer space as well. For example I cold rolled a sheet of steel 1.2m wide 2.4m long by 3mm thick into a cylinder and it grew in length by over 50mm. Pi at 3.14 is good for drawing plans but not practical for real world engineering.

Best Regards
luc2010

Just how much metal-working experience have you had?

I have been guessing that it is not extensive. Tell me, have you ever learned the right way to bend a tube, such as a car brake line?


CANGAS 111

[luc2010]

You just gives me another reason, Why we dont have publicly Higth ''efficient'' working machines!!

quote:
      '' Not amount of attestation of innumerable and honest witnesses would ever convince anyone versed in mathematical and mechanical science,  that a person had squared the circle or Discovered perpetual motion.''
                                                                                                                                                               Baden Powell, Essays and reviews, 1860

[luc2010]

According to the mathematians:

Pi= 3,141 592 653 589 793 ....
Phi=1.618033...

my question is not how they came up with this?
in nature everything is proportional, its all about music if you prefer

so what is the ''perfect'' value used by nature?

the answer:

pi=a/b
phi=c/d
(a,b,c,d are natural number)

why this so important?
because, we need to make a  music / standing waves

frequancy= wave speed/ wave lengeth

electromagnetic waves, sound waves.. its the same rule!

BUT in music, we have no ''perfect'' tuning and this is the topic,  so  my quetion is:
how to tune in the coil?

other exemple:

In the field of amplified speaker design,  there is a long-known secret about how to keep unintended standing waves from forming. sealed box enclosures are always built with interior proportions ''aproximating'' the golden ratio! and its inverse, such as 0.62*1*1.62.
(just fibonacci 0.62 + 1 = 1.62)

These proportions are widely considered  antiharmonic and optimal for eliminating standing waves inside a speaker box.
This works because standing waves cannot form when reflected at or near the proportion of the golden ratio or its inverse!!

Similarly, rooms and auditoriums built in this proportion will not echo and, along with non-reflective materials, avoid extraneous dissipation or cancellation of the original sound energy that can occur in interfering waves!!!


Best Regards and have a good new year
luc2010