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"OMFG, Krypto is getting a mic finally!" - Page 15

post #421 of 464
LOL! Dude is full of a bunch of wretched excess!
You know lead would work pretty well also.

Your thread should have a name change to "KRYPTO...WHAT WILL HE THINK OF NEXT".

Good on ya bro. Keep it up.
post #422 of 464
Thread Starter 
Quote:
Originally Posted by kingpin111 View Post

LOL! Dude is full of a bunch of wretched excess!
You know lead would work pretty well also.

Your thread should have a name change to "KRYPTO...WHAT WILL HE THINK OF NEXT".

Good on ya bro. Keep it up.

that's why I call you KING.

well, this is going to be permenant. Sure I'll take her down to make her a little less asthetically obtrusive... maybe I will get 6 rolls of duct tape and line the MDF with it so i have a grey door, make some trimmings of PL PRO and Great Stuff foam, even a resin window. Maybe some gold and red spray paint? But it's staying. At least till I come up with something better. It's so MAGICAL!



post #423 of 464
If that don't work. LOL



post #424 of 464
Thread Starter 
Quote:
Originally Posted by KERMIE View Post

If that don't work. LOL




son of a..... and I just threw this together in 3 minutes:





post #425 of 464
Thread Starter 
when I calibrate the mic, I have 6dB of fluxuation. Can I calibrate with the tone generator and a single tone?

The "permenant location" killed it, before I had the oak door propped up on one side and the MDF only partially covering the other side, but I had it open and leaning so it left plenty of room to walk through. With it secured on the other side it seemed to lose its effect, but tomorrow I wan't to run incremented sweeps again, but I don't feel comfprtable with the calibration. Maybe it's because of the -10dB sweep i did initially and now my peak is from -15dB sweeps?
post #426 of 464
Thread Starter 


post #427 of 464
rough. closing off your room wasnt kind to your fr. also, you can disable the phase plot to make stuff more visible.
post #428 of 464
Thread Starter 
all that work and it went against me. I can scroll the phase, I purposely left it in case it was helpful. It sounds and feels so much louder way down low though.
post #429 of 464
Thread Starter 
home electric so damn fun, seriousely! nyt u were right, junction 2. no scalding, no charing, no burn marks. looks like tin snips cut the wire off right after the insulation...weird. But heater is running now, its all good, except I disconnected the outlet for now. Should I hook it back up or test it first? How do i test the outlet with the DMM without hooking it up? I assume if it is fried, it is stuck closed, and it would re-fry my wiring and/or pop the fuse.









post #430 of 464
Outlets are dirt cheap. Go get a new one and don't bother messin with the one you have. As you can see, they are super easy to hook up too.

Sweet! Progress!! And you're still here to tell us about it!!!

EDIT: if the only damage is in the junction box then the outlet is probably ok. Does your meter have a continuity setting on it?


dbl
post #431 of 464
gfci wont be able to test without voltage to it. The test creates a short.

Also, a GFCI is like $10
post #432 of 464
Thread Starter 
Quote:
Originally Posted by dbldare View Post

Outlets are dirt cheap. Go get a new one and don't bother messin with the one you have. As you can see, they are super easy to hook up too.

Sweet! Progress!! And you're still here to tell us about it!!!

EDIT: if the only damage is in the junction box then the outlet is probably ok. Does your meter have a continuity setting on it?


dbl

Thanks DBL! What symbol is continuity? Yes they are so easy... I love the screw clamp, I had some audiobahn subwoofers that were bolt down...miss that, love newer amps that have allen wrench bolt down vs the old philips head screw down as well
post #433 of 464
Thread Starter 
Quote:
Originally Posted by notnyt View Post

gfci wont be able to test without voltage to it. The test creates a short.

Also, a GFCI is like $10

So if it is fried and I hook it up, will it re-fry my wires?

And why didnt the fuse in the panel blow to begin with?
post #434 of 464
Your fuse should pop before any wires burn out, but if you don't feel comfortable, just spend the $10 and get a new GFCI outlet.
post #435 of 464
Thread Starter 
Since you say that i feel comfortable wasting a $2 fuse before $10 and a trip to the hardware store

The main thing is, I am learning and getting comfortable with home wiring. So much stigma has instilled its fears.
post #436 of 464
Obviously, disable the circuit before doing any wiring and hooking up the outlet. Once the outlet is hooked up, you can put your fuse back in.

Also, I'm not sure what good a GFCI outlet is going to do, when you don't have any grounds hooked up. $0.02
post #437 of 464
Thread Starter 
Quote:
Originally Posted by lennon_68 View Post

i think i've read that any time a wall or something like that is visibly moving it's sucking the spl out of your room (it's acting like an absorber). I have a wall that moves 1/8" with a 13hz note played loudly and all of my measurements show a dip around 13hz... Coincidence? I think not

Quote:
Originally Posted by kryptonitewhite View Post

i agree, for the most part. I'd bet that the amount of flex varies highly with frequency, but i'd also bet that timing/phase varies as well. I'd guess that at certain frequencies the walls/ceilings/floors/ even panel flex may sometimes act as a pr, almost helping, adding gain, rather than always sucking out. But lets just hope if i do add bracing, i don't lose db :d

Quote:
Originally Posted by eddie horton View Post

interesting debate, and i'd like to know the answer......does a flexing wall, or any large surface, act like a pr or does it cancel out some output like an absorber of some kind.

Quote:
Originally Posted by lennon_68 View Post

i could be way off base but there's two ways i think of it that make it intuitive (to me) that flexing walls would suck dbs.

1. Sound waves are a form of energy. If your wall is moving some of the energy that would be bouncing back and contributing the spl is being used to move the wall.

2. Db's are sound pressure. If your wall moves out as the woofer moves out and in as the woofer moves in the pressure in your room would be lower than if it was rigid.


Interesting thought about acting like a pr though. I wonder if it would be kinda' like that for people outside the room/house to increase spl at those frequencies? Maybe when it warms up outside i'll try to take a sweep with the mic on the other side of that wall, could be interesting

Quote:
Originally Posted by eddie horton View Post

i was kind of leaning your way on this, but you expressed it much better than i could have. Didn't think about what would happen on the other side of said wall or surface. Sucks db's out in the room, but enhances on the outside? Interesting. Depending on where you mount the drivers, krypto could make his entire house one big enclosure with pr's and take the party outside!

-0------------------------------------------------------------------------

Quote:
Originally Posted by bossobass View Post

if you look at my sweeps, i'm seeing expansion and no compression, which means a couple of things, imo; first, i have plenty of gas left in the tank, and second, i believe the expansion may actually be from structural resonances at several frequencies.

Looking at ilkka's results of the sealed peerless, lms, tc, tumult sweeps, there is only compression and never any expansion.

Any thoughts?

Bosso

Quote:
Originally Posted by lilmike View Post

in all the pics i looked at, ilkka measured outdoors in a groundplane setting.

Makes sense to me - room effects can be constructive as well as destructive, so it may be possible to see increases in spl as a result of resonances.
post #438 of 464
Thread Starter 
alright guys, I know I have a huge steep dropoff at 10Hz, but I am very sensitive in general... for example, I am watching Beywolf at -30dB with the subs at +10dB.... when I am already 30dB short on my mains. When single digit stuff gets to wobbling, I perk up. I absorb it. I love it.

So is there a way to record squiggly lines to other material to show what I am sensing from movies using the mic? Best I can think is the RTA but rather than using the generator, lower the dB WAY down so that the single digits register and take a snap shot.

I will run some more sweep as as soon as I can with the new door in its open position and the spare room door mostly closed. What I swear to is single digits, is aprox. trippled with the new door but in its open position. I have a feeling it's like car audio SPL: Completely sealed up is the worst, hardest to get deebeez. But 2nd worst is hatches, doors, and windows all opened up. No loading, as well as omni-directed rather than focussed. Generally the highest SPL is one or both windows down, or one or both front doors open, everything else sealed up tight.

I think complely sealed up I am choking it, but right now is better.



red is door/entryway, blue is windows, towers are in the top right room, on the right side, facing left
post #439 of 464
Thread Starter 
post #440 of 464
What you want is speclab. It will allow you to visualize frequency and spl over time.

I think you can probably find a link to it in the waterfalls thread.
post #441 of 464
Thread Starter 
cool I'll check that out.
post #442 of 464
Thread Starter 
I'd like to settle this once and for all. I am sitting here watching another scary movie on flix. It never fails, it seems to me to have PLENTY of output in the single digits. Is it just me, am I mistaking frequencies above 10Hz for single digits? I just don't believe that mic saying I fall flat below 10Hz. I'm not buying it. I am laying there and I FEEL very good ULF, but my subs are barely even moving at all. I am sure it is combined with higher frequencies both intended as well as harmonics which increase these effects, but I really believe there is weak content down low that my enclosure reproduces very well, add in my 8x8 absorbtion panel trapping a large portion of it and transmitting it, connecting it, to me.

In this film I am at 5 minutes and 23 seconds on Netflix. Up until this point it has been very good, but right at 5:23 a car passes and it's a touch better.

http://movies.netflix.com/WiPlayer?m...&trkid=2461595
post #443 of 464
Here is a linky:
http://www.qsl.net/dl4yhf/spectra1.html

There are a few other things that can do this too. REW can actually show you spectra direct from the MIC - switch it to RTA mode, then choose Spectrum, just like you would for the THD measurements.

Bear in mind that unless modified, your SPL meter is rolling off pretty steeply below 50 Hz due to the C-weighting curve.
post #444 of 464
Thread Starter 
Quote:
Originally Posted by lilmike View Post

Here is a linky:
http://www.qsl.net/dl4yhf/spectra1.html

There are a few other things that can do this too. REW can actually show you spectra direct from the MIC - switch it to RTA mode, then choose Spectrum, just like you would for the THD measurements.

Bear in mind that unless modified, your SPL meter is rolling off pretty steeply below 50 Hz due to the C-weighting curve.

Awesome. Thank you very much Mike. I think thats what notnyt was telling em to do as well. Ive gotta set the rig up again when i am ready to move some heavy stuff and do more drilling. Want to comapare several different door positions see if this giant door I put up will stop working against me on the plots, as it feels/sounds much better with the door 1/2 way clsoed but I havent run sweeps that way yet.
post #445 of 464
Yes, that is the software that notnyt was referring to. I've not got a lot of experience with spectrum lab, been too busy with other things to play with it much.

It is a very cool piece of software. There are a few others that do this out there too, although at least one is a Linux program.
post #446 of 464
Thread Starter 
I just need to know if I am nuts...if so, fine, 10-15Hz seems like 5 Hz... well that saves me a boat load
post #447 of 464
I wish I could just find someone and pay them to come show me how to use this crap...

Notnyt feel like doing a good deed and showing a (semi) local wtf is going on with this stuff... I'd take a drive out
post #448 of 464
Sure, drop me a PM and we'll set something up.
post #449 of 464
Thread Starter 
Quote:
Originally Posted by notnyt View Post

Sure, drop me a PM and we'll set something up.

pretty cool, sure helped me a lot to get my heat back on
post #450 of 464
Thread Starter 
well here we are again



IDK whats wrong, receiver master at -15dB (kissed the back plate just barely I think...first time running sweeps with the outside doors open) tried recalibrating the mic, checked levels on PC...
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