Topic: Some mic measurements, now with graphs

[page]

I can see the post police are watching my every move

[Church-Audio]

I want to apologize to everyone that I have offended. I really should not have said anything, I am sorry. Its not a big deal if the tests are not 100% perfect very few tests in reality are. Anyway that's all I wanted to say. I would still like to be in the circle of trust.   

[page]

I want to apologize to everyone that I have offended. I really should not have said anything, I am sorry. Its not a big deal if the tests are not 100% perfect very few tests in reality are. Anyway that's all I wanted to say. I would still like to be in the circle of trust.   

haha, things like this don't bother me as long as people explain things and are civil. My only point to try and take you to ask was on the metric issue and you finally spoke on that point so my checklist was resolved.

no worries (to me at any rate), we've done worse here...

[kirk97132]

Chris is there any chance you will publish the graphs for your mics?  Ya know now that we are all in the circle of trust and all.

[Church-Audio]

Chris is there any chance you will publish the graphs for your mics?  Ya know now that we are all in the circle of trust and all.

lol I am really flattered, I am in the circle of trust. I am actually still working on publishing graphs of my mics.. Because I do want to get it right I have posted a few graphs in the past. I don't want to mislead anyone by publishing things that are not 100% correct. I am actually going to build a test chamber that will be good down to 100hz. I am also going to be taking my mics to an independent lab the NRC. To get individual mic response tests done but its very expensive almost $3,000 per session.

[illconditioned]

I seem to remember an article where the person ran the mics not only outside, but also on a tower they constructed high over the ground to get near perfect acoustics!  I can just see some geeks like us climbing a tower somewhere late at night...

  Richard

[Church-Audio]

I seem to remember an article where the person ran the mics not only outside, but also on a tower they constructed high over the ground to get near perfect acoustics!  I can just see some geeks like us climbing a tower somewhere late at night...

  Richard

The best way to test is with the speaker on the ground facing up.. The mic can be suspended at least 10 feet from the ground.. The speaker needs to be baffled. So that there are no wrap around reflections allowed to hit the ground.. Or a tower that is at least 10 feet off the ground and as small of a foot print as possible to avoid reelections. When I worked for a speaker company here in Canada as a lab technician measuring loudspeakers. We had an arm that was attached to the side of the building and it was about 15 feet off the ground x 40 feet long to avoid reflections.. The huge problem with outside tests is WIND.... There is no getting around the wind issue. It effects your measurements big time.. If you look on the earthworks website they have an interesting paper on how they measure the mics they sell.. Pretty interesting.. They are using the spark gap method and speakers.