How Far Can You Space Drivers Before Phase Cancellations?

Rocket_Ronny · « **on:** 17 Apr 2011, 10:43 pm »

Do you know of a chart, or guide, that shows frequency wavelengths and when phase cancellations will happen when two drivers put out that frequency?

For instance, in a MTM array, as you have the Mids go up higher in frequency the spacing of the drivers have to be closer or phase cancellations will happen. That's why you don't see any MMTMM arrays.

So there is a relationship to frequency wavelength and the distance of similar driver spacing.

Thanks for any help?

Rocket_Ronny

planet10 · « **Reply #1 on:** 18 Apr 2011, 03:57 am »

Ideally <1/2 wavelength.

dave

JohnR · « **Reply #2 on:** 18 Apr 2011, 04:01 am »

I haven't tried it (although I should) but the Asymmetrical Response Pattern Estimator looks like just the ticket.

Rocket_Ronny · « **Reply #3 on:** 18 Apr 2011, 02:33 pm »

Thanks guys.

Is there a chart that states the wave length for any given frequency? Or is it a ratio?

Rocket_Riding the Wave_Ronny

JohnR · « **Reply #4 on:** 18 Apr 2011, 03:38 pm »

Wavelength is the speed of sound divided by the frequency.

http://www.mcsquared.com/wavelength.htm

werd · « **Reply #5 on:** 18 Apr 2011, 04:21 pm »

Quote from: JohnR on 18 Apr 2011, 04:01 am

I haven't tried it (although I should) but the Asymmetrical Response Pattern Estimator looks like just the ticket.

Hi

AVG won't let me install that prog due to a trojan threat found....

JohnR · « **Reply #6 on:** 18 Apr 2011, 05:20 pm »

Hm. MSE said it's OK. Anyway, I can't run it, it's not working quite right on my very old version of Excel.

werd · « **Reply #7 on:** 19 Apr 2011, 12:35 am »

Quote from: JohnR on 18 Apr 2011, 05:20 pm

Hm. MSE said it's OK. Anyway, I can't run it, it's not working quite right on my very old version of Excel.

I would say you have a trojan on your comp right now.

JohnR · « **Reply #8 on:** 19 Apr 2011, 03:45 am »

Quote from: werd on 19 Apr 2011, 12:35 am

I would say you have a trojan on your comp right now.

If so, it's quarantined in a VM that can easily be deleted. However, I checked both the self-extracting executable and the Excel file:

http://virusscan.jotti.org/ - no infection found (both .exe and .xls)
MSE - both clean
StopZilla - nothing found
AVG - both clean

I also re-downloaded both versions with AVG active and no warnings came up. So I don't know what you're seeing...

werd · « **Reply #9 on:** 19 Apr 2011, 02:59 pm »

Ok. sorry, i can't seem to locate that event in my log or vault.

. It will not replicate either and i have the prog on my desktop. But it happend.

Rocket_Ronny · « **Reply #10 on:** 19 Apr 2011, 04:12 pm »

Thank you.

Newbee questions I know.

Rocket_Ronny