I did a search here on the forum about microphone calibration files and I was wondering if the method of intervening on the file based on microphone models with higher specifications and costs, can be useful to obtain/improve the measurement quality of the microphone.
mic. ECM8000
mic. ECM8000
Yes it can. These are fairly flat up to 1-2kHz and not bad up to 5kHz so if this covers your crossover ranges then you should be right to voice them in.
I might have a calibration file, I know a few here do. There's a little variability but as I was saying, within voicing range.
I might have a calibration file, I know a few here do. There's a little variability but as I was saying, within voicing range.
Ciao Allen,
I already downloaded and took a quick look at the file that you download from their site and it is like silto a three column text file. but is there a program to read the current calibration and then with the added file?
I already downloaded and took a quick look at the file that you download from their site and it is like silto a three column text file. but is there a program to read the current calibration and then with the added file?
You can probably use it in a simulator. Pretend it is a response file or an impedance file. If you have difficulty, post the file here.
with calibration files and without. I'm perplexed, I don't see big differences and... there must be something I'm doing wrong. this measurement is done with the LS 3/5a hybrid finished in the last few days.
I looked at the calibration file you can download from the site a few months ago, and it looks quite a bit like the one I made from a calibrated mic for my ECM8000 many years ago (2008?) even though their design and mic source has likely changed since then.
These things can vary from sample to sample by a dB or two in sensitivity and response, but a measurement is better than no measurement and these are often pretty close, in my limited experience. I have only messed around with three of them. Two old ones which were almost identical and one new one.
I recently had a design of mine measured by a Klippel unit, and the high frequencies looked pretty close, so I think that part of my cal is alright, anyway...
These things can vary from sample to sample by a dB or two in sensitivity and response, but a measurement is better than no measurement and these are often pretty close, in my limited experience. I have only messed around with three of them. Two old ones which were almost identical and one new one.
I recently had a design of mine measured by a Klippel unit, and the high frequencies looked pretty close, so I think that part of my cal is alright, anyway...
if I understand correctly, you are telling me that I should raise the measurement level - when I do the Level check, if I remember correctly, I go around -22-23db, I raise it up to -12 and tighten the scale from 20hz to 25Khz?
later I do other measurement tests, I try to measure also the other type of crossover (the one with the different approach) this time I place the microphone on the Nikon tripod (if I find one) and maybe I put it about 1 meter away and well aligned to the speaker.
later I do other measurement tests, I try to measure also the other type of crossover (the one with the different approach) this time I place the microphone on the Nikon tripod (if I find one) and maybe I put it about 1 meter away and well aligned to the speaker.
In REW looking at the graph - hit the box named "Limits" upper right.
Add 10 in "SPL Top" and -40 in "SPL Bottom". Hit Enter.
Now you will see your measurement like most presentations on this site. I hope it's clear that now you see much deeper into the measurement but all levels are the same. Same measurement, different presentation scales.
As of now, you have such an tremdeous large range for dB that small variations can't be seen.
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Add 10 in "SPL Top" and -40 in "SPL Bottom". Hit Enter.
Now you will see your measurement like most presentations on this site. I hope it's clear that now you see much deeper into the measurement but all levels are the same. Same measurement, different presentation scales.
As of now, you have such an tremdeous large range for dB that small variations can't be seen.
//