Dayton mic 3db peak/ dip?

[sendler]

Is my Dayton mic representative with it's 2.8db peak/ dip from 4100 to 4600Hz or did I get a lemon or incorrect cal file?
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http://www.daytonaudio.com/support-Emm.cfm

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enter the mic number 0194 to see the cal file.

[dano]

Re: Dayton mic 3db peak/ dip?

If you have the correct correction file it shouldn't make any difference.

[envisionelec]

Re: Dayton mic 3db peak/ dip?

I looked at ten other serial numbers; some in sequence and others completely random, and yours is not an anomaly. Some have a ripple at 7kHz while others match yours. Since you've got a correction file, it shouldn't be a concern.

[sendler]

Reflection?

The peak/ dip combo looks like a reflection artifact to me. From the mic stand?

[sendler]

Reflection in calibration?

Doesn't this look like a reflection at 4k in the calibration measurement?

[Anechoic]

Re: Reflection in calibration?

Doesn't this look like a reflection at 4k in the calibration measurement?

Holy crap, that's an *exceptionally flat* EMM-6!

It's likely an artifact from the mic mount, don't worry about it - you can probably smooth it out by hand.

I actually get similar artifacts in my mic measurement, but since I have actual free-field measurement data for my Type 1 mics, I've been able to quantify it and smooth it out of my calibration data.

[sendler]

Re: Reflection in calibration?

Holy crap, that's an *exceptionally flat* EMM-6!

It's likely an artifact from the mic mount, don't worry about it - you can probably smooth it out by hand.

I actually get similar artifacts in my mic measurement, but since I have actual free-field measurement data for my Type 1 mics, I've been able to quantify it and smooth it out of my calibration data.

Yes, a big reflection artifact in there.
Considering how flat the over all curve is, I might actually be much better off to run this mike without the cal file. The slight low shelf at 14KHz is probably real but isn't a big deal up there. The peak/ dip combos at 4.1K, and wiggles at 6K and 8.8K look like reflections and resonance in the mic stand in the measurement and probably shouldn't be corrected for. Then, the last thing to consider is how much of the high shelf from 2K to 3K, leading into the first peak/ dip, is real.

[r-carpenter]

Re: Dayton mic 3db peak/ dip?

if this is a response of the mice without calibration file used, it's either a phenomenally flat mic or a total BS. It's that flat below 30hz??? I'd call cross spectrum labs and ask them if it looks like the real thing. I think Herb calibrated quite a few of MM-6 mics.

[Anechoic]

Re: Dayton mic 3db peak/ dip?

if this is a response of the mice without calibration file used, it's either a phenomenally flat mic or a total BS. It's that flat below 30hz??? I'd call cross spectrum labs and ask them if it looks like the real thing. I think Herb calibrated quite a few of MM-6 mics.

I'm Herb (sorry if I wasn't clear about that) and I'm reasonably sure that it's real (although as I said above, it's exceptionally flat). The most recent batch of mics (serial #'s 300 and above) all seem flatter than the earlier batches, so perhaps they've been able to zero in on a target in their manufacturing process.

[sendler]

Same as mine?

I'm Herb (sorry if I wasn't clear about that) and I'm reasonably sure that it's real (although as I said above, it's exceptionally flat). The most recent batch of mics (serial #'s 300 and above) all seem flatter than the earlier batches, so perhaps they've been able to zero in on a target in their manufacturing process.

Are you finding any severe, 3db peak/ dips in the EMM-6 mics you cal as they show in mine? It is over all very flat except for that.

[Anechoic]

Re: Same as mine?

Are you finding any severe, 3db peak/ dips in the EMM-6 mics you cal as they show in mine? It is over all very flat except for that.

Not like that, no.

[sendler]

Re Verified

Not like that, no.

I guess I should end all the conjecture (Is there any conjecture? Hello out therrrrre) and send the Dayton mic out to have it calibrated again.

[Anechoic]

Re: Re Verified

I guess I should end all the conjecture (Is there any conjecture? Hello out therrrrre) and send the Dayton mic out to have it calibrated again.

I'm perfectly happy to take your money but I really don't think you have to worry about it.

[sendler]

second opinion

I'm perfectly happy to take your money but I really don't think you have to worry about it.

The mic looks very flat and could be used with no cal file but at this point I'm just curious to get another calibration as I am sure the PE result has an important flaw. I was hoping that some of the active designers that post here and are using this mike would have chimed in but I guess I don't mind chipping in to verify the accuracy of the Parts Express calibration to help all the other measurement newbies that bought one of these mics decide if they should trust their cal file.

[Dennis H]

Re: Dayton mic 3db peak/ dip?

FWIW, here are the curves of my older mic as supplied by PE and by Herb. This was before PE supplied the cal files.

Edit: I consider this to be a very nice mic compared to most that were being shipped at the time. Thanks Herb!