this is WEIRD👽👽👽???? especially if you look into it further...
when 80/2.54 is 'pi'...3.14960(62992)125984(251968(503936)007872(015744)31488(62988)129..
22/7 is 'pi'...3.142857(142857)(142857...
and obviously pi is 'pi'...3.1415926..
2.75/7 is .39285714(also39.37) and 2.75/2.54 is 1.082677165(35)4339070)866(14)1732(28)3464(56)6929(112)133858(224)267716(448)535433...
(24)...
5.5/2.54 2165(35)433(070)866(14)1732...
11/2.54 4.33(070)866(14)1732...
22/2.54 8.66(14)1732...
(this gets interesting!)? each as (/7 and 2.54 in a calculator with a big screen( out to long decimals)
5.5/7 .7874(216... 2.165(35)433(070)866(14)1732(28...
11/7 1.5748(432)1728 4.33(070)866(14)1732(28(3464(56)...
22/7 3.1496(864)3456 8.66(14)1732(28...
44/7 6.2992(1728)6912
88/7 12.5984(3456)13824
176/7 25.1968(6912)27648
352/7 50.3936(13824)55296
704/7 100.7872(27648)110592
1408/7 201.5744(55296)221184
2816/7 403.1488(110592)442368
5632/7 806.2976(2201184)884636
11264/7 1612.5968(4402368)177272
1/2.54 is .3937 is inch to meter (22.5 and 1/8pi) (pendulum swing of 30degrees at that length is 1 second @30degrees(pi/6) or 12 on 6.9375.
1.609344 is km to mile (92160 and 512pi)
when pi is 80/2.54, then, when the speed of sound is 360x (pi) = 1133.858267716535 (345.6)then 1 meter is 86.4 (the diameter of the sun x1000)and 24 hours of seconds and Jupiter's diam(x100 as well as Saturn's orbital mean in milesx100000000
so then what?
864x 1.609344 is 1390473216(suns diameter in KM... Saturn's orbit at perigee, Jupiter in km, (just over 16 days in seconds(13824) (1690344 x 3937 is 666xxx mph (light speed) and (432)^2 is 186624 mpsec(close) and (1728) ^2 is speed of light msec(close).
360 cm subwoofer (first) one , under desk, , one huge(for fun)
but what does this all mean? or how is it connected????
why does it perfectly cancel out (432hz), 864.0, 1728, 2592, 3456, 4320, 5184 (the exterior hypotenuse angle of the great pyramid corners), 6048, 6912, 7776, 8640,9504, 10368, 11232, 12096, 12960, 13824, 14620, 155..16.17280, 18,19, 20, 21600, .. at -990dB i simulation? when split up "perfectly"...
1609.142857 is 512 pi
392857 is 0.125 pi
pi/9 is the exact location for driver entry in all TLs (0.349206349) to precisely fill the 3x (1/4 Fb) void in response. that is also (432)^4, which is (186624)^2.. (speed of light in miles psec.
There's so much more.. the Pythagorean theorem to 1728/864 to yield 149.6 hz(the first peak in the response of the compoundTL at 360 cm
when 80/2.54 is 'pi'...3.14960(62992)125984(251968(503936)007872(015744)31488(62988)129..
22/7 is 'pi'...3.142857(142857)(142857...
and obviously pi is 'pi'...3.1415926..
2.75/7 is .39285714(also39.37) and 2.75/2.54 is 1.082677165(35)4339070)866(14)1732(28)3464(56)6929(112)133858(224)267716(448)535433...
(24)...
5.5/2.54 2165(35)433(070)866(14)1732...
11/2.54 4.33(070)866(14)1732...
22/2.54 8.66(14)1732...
(this gets interesting!)? each as (/7 and 2.54 in a calculator with a big screen( out to long decimals)
5.5/7 .7874(216... 2.165(35)433(070)866(14)1732(28...
11/7 1.5748(432)1728 4.33(070)866(14)1732(28(3464(56)...
22/7 3.1496(864)3456 8.66(14)1732(28...
44/7 6.2992(1728)6912
88/7 12.5984(3456)13824
176/7 25.1968(6912)27648
352/7 50.3936(13824)55296
704/7 100.7872(27648)110592
1408/7 201.5744(55296)221184
2816/7 403.1488(110592)442368
5632/7 806.2976(2201184)884636
11264/7 1612.5968(4402368)177272
1/2.54 is .3937 is inch to meter (22.5 and 1/8pi) (pendulum swing of 30degrees at that length is 1 second @30degrees(pi/6) or 12 on 6.9375.
1.609344 is km to mile (92160 and 512pi)
when pi is 80/2.54, then, when the speed of sound is 360x (pi) = 1133.858267716535 (345.6)then 1 meter is 86.4 (the diameter of the sun x1000)and 24 hours of seconds and Jupiter's diam(x100 as well as Saturn's orbital mean in milesx100000000
so then what?
864x 1.609344 is 1390473216(suns diameter in KM... Saturn's orbit at perigee, Jupiter in km, (just over 16 days in seconds(13824) (1690344 x 3937 is 666xxx mph (light speed) and (432)^2 is 186624 mpsec(close) and (1728) ^2 is speed of light msec(close).
360 cm subwoofer (first) one , under desk, , one huge(for fun)
but what does this all mean? or how is it connected????
why does it perfectly cancel out (432hz), 864.0, 1728, 2592, 3456, 4320, 5184 (the exterior hypotenuse angle of the great pyramid corners), 6048, 6912, 7776, 8640,9504, 10368, 11232, 12096, 12960, 13824, 14620, 155..16.17280, 18,19, 20, 21600, .. at -990dB i simulation? when split up "perfectly"...
1609.142857 is 512 pi
392857 is 0.125 pi
pi/9 is the exact location for driver entry in all TLs (0.349206349) to precisely fill the 3x (1/4 Fb) void in response. that is also (432)^4, which is (186624)^2.. (speed of light in miles psec.
There's so much more.. the Pythagorean theorem to 1728/864 to yield 149.6 hz(the first peak in the response of the compoundTL at 360 cm
??how is it connected to ‘everything’ would you say’? What causes this -990dB alignment?
TWW mains and subwoofer both using this approach. with these drivers currently, for example.
https://www.parts-express.com/Dayto...eated-Paper-Cone-Midbass-Woofer-8-Ohm-295-416
Attachments
Sorry if I'm a bit harsh, but this is plain nosense, written by someone who doesn't know about mathematics and physics. If you use numbers from your head you can derive anything.
Ralf
Just as an example, pi is not 80/2.54, and c (the speed of sound) is not related to pi by any way.
Ralf
https://en.wikipedia.org/wiki/Numerology
Numerology is the pseudoscientific belief in a divine or mystical relationship between a number and one or more coinciding events
It is easy to fall into the numerology trap. Even professional engineers and scientists will occasionally be distracted by a numerical pattern or relationship that turns out to be simply coincidence.
pi is approximately 3.14159, which is way more precise than anyone needs.
Pi cannot be represented fully as a decimal number or as a fraction. It is like "e" or square root of 2. These are irrational numbers that can only be approximated.
Numerology is the pseudoscientific belief in a divine or mystical relationship between a number and one or more coinciding events
It is easy to fall into the numerology trap. Even professional engineers and scientists will occasionally be distracted by a numerical pattern or relationship that turns out to be simply coincidence.
pi is approximately 80/2.54
pi is approximately 22/7
pi is approximately 3.14159, which is way more precise than anyone needs.
Pi cannot be represented fully as a decimal number or as a fraction. It is like "e" or square root of 2. These are irrational numbers that can only be approximated.
Most things we deal with in acoustics for speakers works within the realm of incompressible fluid mechanics. That is, the assumption that flows happen well below the speed of sound. The speed of sound is purely a result of gas kinetic theory (think of air molecules as balls randomly bouncing around and hitting each other like balls in an air powered lottery picking machine, but the size is much smaller) and depends on molecular weight of the gas and temperature. On earth the MW is about 30 kg/kg-mol is close enough. At average ambient temps circa 300K the speed of sound is around 342m/sec. If the atmosphere was made of something else, this changes. It scales with the sqrt(T/MW) so on a planet like Jupiter, speakers would sound and work very differently than on Earth. Jupiter’s atmosphere for example is 90% hydrogen and 10% helium and temperature at the cloud top is 120K. So speed of sound would be about 2.4x faster than on earth (if you talked while breathing the Jovian atmosphere, you would sound like helium boy). That would mean that TL speakers would need to be sized 2.4x longer to reach the same bass extension. As usual, things are super sized on Jupiter. 🙂
But speed of light has nothing to do with 1/4 wave acoustics for speakers on Earth.
Pi is common in many equations though that have to do with oscillations and cyclic behavior. But frequency of sound is up to 20kHz. Frequency of “light”, depending on regime as radio waves are technically EM waves or “light” - albeit, very low frequency light and in the hundreds of kHz to MHz and THz.
Having said that, I like that we can use simple accidental relations to help just memorize big natural numbers like pi, e, speed of light etc.
I like speed of light in inches and nano seconds. This was useful for finding delay length in cables when looking at nanosecond pulses on an oscilloscope. It’s about a foot per nanosecond (closer to 11in but you get what I mean).
This brings me to another favorite unit: the mile. The mile is actually a metric unit (base 10) invented by the Romans. It works quite well and is based on the average pace (2 steps) of an average Roman soldier. This was important as soldiers need to know how far they march. We know they marched long distances. So a Roman soldier’s 1000 paces is one mile. It turns out, I have the exact Roman soldier pace (5.28 ft) as when I count out 1000 paces when I walk, it’s a mile within 1%. 🙂
By contrast, the cm or meter has no natural relationship to any everyday human experience but to a precious metal meter stick made of platinum 1.000 meter long (by definition) kept in a safe somewhere.
But speed of light has nothing to do with 1/4 wave acoustics for speakers on Earth.
Pi is common in many equations though that have to do with oscillations and cyclic behavior. But frequency of sound is up to 20kHz. Frequency of “light”, depending on regime as radio waves are technically EM waves or “light” - albeit, very low frequency light and in the hundreds of kHz to MHz and THz.
Having said that, I like that we can use simple accidental relations to help just memorize big natural numbers like pi, e, speed of light etc.
I like speed of light in inches and nano seconds. This was useful for finding delay length in cables when looking at nanosecond pulses on an oscilloscope. It’s about a foot per nanosecond (closer to 11in but you get what I mean).
This brings me to another favorite unit: the mile. The mile is actually a metric unit (base 10) invented by the Romans. It works quite well and is based on the average pace (2 steps) of an average Roman soldier. This was important as soldiers need to know how far they march. We know they marched long distances. So a Roman soldier’s 1000 paces is one mile. It turns out, I have the exact Roman soldier pace (5.28 ft) as when I count out 1000 paces when I walk, it’s a mile within 1%. 🙂
By contrast, the cm or meter has no natural relationship to any everyday human experience but to a precious metal meter stick made of platinum 1.000 meter long (by definition) kept in a safe somewhere.
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Here's a Hoopy Frood who really knows where his towel is... 😉
Gotta love numerology:
1/9 = .11111---
2/9 = .22222---
3/9 = .33333---
4/9 = .44444---
5/9 = .55555---
6/9 = .66666---
7/9 = .77777---
8/9 = .88888---
So by logical extension
9/9 = .99999--- 😊
1/9 = .11111---
2/9 = .22222---
3/9 = .33333---
4/9 = .44444---
5/9 = .55555---
6/9 = .66666---
7/9 = .77777---
8/9 = .88888---
So by logical extension
9/9 = .99999--- 😊
WHAT are you talking about?
For Humans, Acoustics deal with Air, a MOST compressible fluid.
We are not designing Dolphin communication or submarine detecting Sonar transducers here.
Just as one extra example, think what happens in an acoustic suspension cabinet filled with ... duh! ..... Air.
Now imagine same cabinet filled with an incompressible fluid such as water.
Do you say both will work the same way?
Just curious, is today Fool´s day or similar in some Country and I am not aware of it? .... just read the nonsensical Numerology thread.
Shivering about what I may find next.
I beg your pardon?
Instead of an absolutely unstable definition based o a small group of humans (2000 years ago Roman soldiers) which varied both geographically (different Etnias have different heights and thus step lengths) and historically (average "Roman" today is taller than a Classic Roman one) meaning it´s a CRAPPY definition.
Distinguished European Astronomers, starting from Copernicus, suggested a length unit based on an Earth dimension ... which presumably won´t change in a few Million Years, go figure.
That they made a 1 meter ruler based on that Earth based definition is just an extra.
And "somewhere" happens to be the most advanced Metrology Institute in the World at that time.
To despise advanced French so much, you must be from one of 3 archaic Countries in the World, meaning the United States, Liberia or Myanmar.
Sorry - You are right. My bad.
I was thinking of low Mach number bulk flows in vented cabinets, TLs and horns. They can be described with incompressible assumption but the waves themselves propagate via compressibility effects. Sometimes math tricks to isolate the compressibility term into the source/sink term is used and then the rest of the flow field is solved with incompressible assumption. Compressible flow solvers are very compute intensive.
I think having water behind and in front of driver cone in a box will work the same way but more power , with speed of sound in km/s now. 🙂
I’m sorry where did I say that I despise the advanced French?
Just saying, a mile is based on the number 1000 (mile comes from Latin mille = 1000) and walking stride of a person. Variability in that person’s stride, of course is an issue but gets you close if you are circa 5ft to 6ft tall.
The modern definition of a meter (or km) isn’t very useful by average people:
“The metre is currently defined as the length of the path travelled by light in a vacuum in 1/299 792 458 of a second.”
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^This^ was altered as recently as 2019.. the cm was rounded up in ~1954. How is the ‘meter’ in Egyptian pyramid? I don’t know I’m not here to **** people off certainly not ones that are hell-bent on arguing everything anyhow already.. or making it into some kind of argument before it’s even a valuable discussion…
you can see people already out for blood before the topic is even really dove into..
funny is the Internet , or even sometimes this forum, is the assumptions people make about what you’re trying to convey through typing…
numerology… I think we can all come to a conclusion that that is an inconvenient or convenient coincidental sequence of nonsense often snake oiled into something else.
Meanwhile the rest of us can notice things that work regardless of whether they are representative of the ‘speed of light’, which isnt an actual ‘thing’ as it has never been measured it’s merely a number and a math constant at this point. Who is no perfect vacuum… or even for 420 ppm of ‘dust’ per cubic centimeter of what we call ‘space’.
The point is these numbers work where they do and when they do and investigating that is more important than a bunch of wanna be engineers beating their chest and just telling someone how to lay off the caffeine or ..
Again, the point is these numbers work where they do and when they do and investigating that is more important than a bunch of wanna be engineers beating their chest and just telling someone how to lay off the caffeine or??
I always appreciate your view (XRK 🙂 )on things it always seems to be a little bit more real than most🙏🏻
Say We list the size in miles and kilometers of the sun and the moon in order we have ourselves a 0.04 , 0.0376 error?
FACT:
Mile:
1079.6moon rad(10800)
2159.2moon dia(21600)
432376sun radius(43200)
864752sun diameter(86400
km
1737.46 moon rad(172800)
3474.9 moon dia(345600)
695841.7 rad sun.(691200)
1391683.44 sun dia (1382400)
10800-3(180)(seconds hours/min
21600-6(360)
43200-12(720)
86400-24(1440)
172800-48(2880)
345600-96(5760)
691200-192(11520)
1382400-384(23040)——this all on Compass as well
if we look deeper(Long form decimal point calculator or scientific version) into the conversion factor of centimeters to inch or in this :11/2.54 not that hard to see what’s going on in those numbers either(Maybe for some individuals in this group?)
people will get over themselves and just look at things with an open mind instead of labeling them as numerology or some stupid nonsense that wasn’t even inferred or suggested…
I’d be something interesting here to see that has to do with wave lengths in their relationship to the speed of light as a number not as a piece of scientific fact or reference material….its the number 3 Or its 1862xx or its 666,(6671..) or its 299792457759. Or 187.
3937(187 plus 3750)
7874(374 plus 7500)
15748(748 plus 15000)
31496(1496 plus 30000)
62992(2992 plus 60000)
125984(5984 plus 12000)
251968 (11968 plus 24000)
50393(6) (not 50393 (7) as shown oon a calculator..
11/2.64:
4.33(070)866(14)1732(28)3456(56)6929(12)133858(24)…
(2.75/2.54)108.2677…
(5.5/2.54)216535433…
(11/2.54) 433…
22…
432, 864, 1728,3456,6912,13824.
it’s really not that hard, nobody suggested ‘, numerology’ nobody suggested anything. I am suggesting everything I said is available to see in ‘horn response’ .
if you wanna argue with horn response, take it up with David McBean.
Look at your number system and look at what is missing. Look deeper than the front of your nose. There’s an error in everything and it’s ongoing. Different than 365.25 is to 360. Not always 365.25 it varies but it is slowly creeping… Does that have anything to do with the fact that 65 million years ago a day was 21 hours long approximately not 24?
Look harder at what I’m saying or don’t look at all either way it’s in your speakers when you line them up a certain way which is a variety of things so far very specific to using both sides of the driver to ‘clock timing’ so to speak.(parallel or series higher order)
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