A little comparison on 4 traces taken with 4 ISEMcon 7150 mic’s   3 comments

So i did a small comparison between 4 traces taken with 4 ISEMcon 7150 mics on my PMC studio monitors. I only synchronized the first measurement and after that i copied the time on every new transfer measurement/mic. After that i adjusted the mic position in order to match the phase response as close as possible to the original trace to get the mic at the same distance as the first measurement.

Matched octa EMX7150:DPA set     isemcon octa set

mic's

 

This is absolutely no lab test ! please take note of that.

SMAART7 has the option of importing a calibration file (all ISEMcon mic’s i have come with a USB stick with the cal files on it).

First mic (no cal file).0001a ISEMcon nm317 strt

First mic with cal file vs the no cal file.0001b ISEMcon 317 weighting curve applied

Second mic (no cal file).0002a ISEMcon nm318 strt

Second mic with cal file vs the no cal file.0002bISEMcon 318 weighting curve applied

Third mic (no cal file).0003a ISEMcon nm319 strt

Third mic with cal file vs the no cal file.0003b ISEMcon 319 weighting curve applied

Fourth mic (no cal file).0004a ISEMcon 326 strt

Fourth mic with cal file vs the no cal file.0004b ISEMcon 326 strt vs 326 cal file applied

All 4 mic no cal files applied .ISEMcon 7150 all 4 strt

All 4 mic cal files applied .ISEMcon 7150 all 4 cal file applied

All 4 mic no cal files applied zoom.ISEMcon 7150 all 4 strt zoom

All 4 mic cal files applied zoom.ISEMcon 7150 all 4 cal file applied

All 4 mic cal files applied zoom with a level correction on the fourth mic .ISEMcon 7150 all 4 cal file applied 1 mic level corected by 0.9db

Again this is not a lab test.

So these are transfer functions between 2 mic’s. The pre amp used is a Smaart i/o. The mic with nm 326 became my reference (because it was the first 1 i took out of the box so no special reason what so ever).

I tried to get both mic capsules as close together as possible and made a transfer measurement.

001 326 to 315

002 326 to 316

003 326 to 317

004 326 to 318

005 326 to 319

006 326 to 320

007 326 to 322

008 326 to 323

009 326 to 324

010 All isemcon from about 63Hz 6db scaling on Yaxis 

 DPA for reference copy 7150 with correction file vs DPA4007 copy Mic compare 7150-1406 ref to 1401 Mic compare 7150-1406 ref to 1408 Mic compare 7150-1406 ref to 1410

Posted 02/01/2014 by timobeckmangeluid in Geen categorie

3 responses to “A little comparison on 4 traces taken with 4 ISEMcon 7150 mic’s

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  1. Dit is op ashishmalaviya herblogd.

  2. I would be curious to see a transfer function measurement comparing the iSEMcon mic’s to a high-end mic such as a DPA 4007 or similar… Thanks for doing this!

    • I can do a transfer function between the emx7150 and a dpa 4007 since i have a matched set of 6 d-a 4007 mics.
      The only challenge doing this is getting the mic capsules close together. The dpa has a larger capsule so the data from a transfer will be questionable

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