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  Topic Review (Newest First)
12-25-13 06:47 PM
Gaugster
Re: Microphone stand for measurements at ear height ?

I use a camera tripod for vehicle measurements. However the leather couch vibrates a lot at low frequencies. So for home I just have a microphone boom stand that I picked up for the local music shop - Guitar Center. Floor vibrates some too but certainly less then the leather couch.
12-25-13 03:50 AM
AudiocRaver
Re: Microphone stand for measurements at ear height ?

This thread adapter will allow you to mount a mic clip on a camera stand.
12-23-13 04:12 PM
Wayne A. Pflughaupt
Re: Microphone stand for measurements at ear height ?


Quote:
gtjames wrote: View Post
Yes my camera tripod accepts the audessey tripod screws in mic holds very tight than adjust legs for proper ear height I've done this for years just wondering if anyone else uses this procedure. The tripod has the screw in with thumb tightened to hold mic very firm
Sure, you can easily use a camera tripod for an Audyssey mic, as well as the mics that come with other AVR auto-calibration systems. However, you canít readily use those mics with REW, and the OP was specifically talking about a Behringer ECM8000 or similar measurement mic in his opening post. Those mics require a standard mic clip. Googling for a tripod mic clip adapter didnít get me much. It will be problematic using a regular measurement mic on a camera tripod without one.




Regards,
Wayne
12-23-13 12:09 PM
Dwight Angus
Re: Microphone stand for measurements at ear height ?

Yeah I use the same setup for audyssey xt32 calibration. Tripod sits on seats at ear level and fits snugly into microphone tread.
12-22-13 09:24 PM
gtjames
Quote:
Wayne A. Pflughaupt wrote: View Post
The trick will be to find an adapter for the tripod that will accept a mic clip. If you can, you can use a tripod, but it may mean you’d have to move your seating out of the way in order to locate the mic precisely where your head would be in your primary listening position. Regards, Wayne
Tripod sets right on love seat has 3 legs and very level
12-22-13 09:23 PM
gtjames
Quote:
Wayne A. Pflughaupt wrote: View Post
The trick will be to find an adapter for the tripod that will accept a mic clip. If you can, you can use a tripod, but it may mean you’d have to move your seating out of the way in order to locate the mic precisely where your head would be in your primary listening position. Regards, Wayne
Yes my camera tripod accepts the audessey tripod screws in mic holds very tight than adjust legs for proper ear height I've done this for years just wondering if anyone else uses this procedure. The tripod has the screw in with thumb tightened to hold mic very firm
12-22-13 09:16 PM
Wayne A. Pflughaupt
Re: Microphone stand for measurements at ear height ?


The trick will be to find an adapter for the tripod that will accept a mic clip. If you can, you can use a tripod, but it may mean you’d have to move your seating out of the way in order to locate the mic precisely where your head would be in your primary listening position.

Regards,
Wayne
12-22-13 08:47 PM
gtjames For calibration why don't people just use there camera tripod
08-16-13 02:27 AM
AudiocRaver
Re: Microphone stand for measurements at ear height ?

Quote:
jtalden wrote: View Post
I mean "b".

In my case, I:
> Set the RTA to "Forever Averaging".
> Place mic on stand at LP.
> Start Signal generator then RTA.
> Move quickly to mic, remove it from the stand and slowly sweep around the listening window chosen.
[I use a vertical zigzag pattern moving up and down out to the right and back to the center and then out to the left and back to the center but any pattern covering the window reasonably uniformly will work.]
> Replace the mic in the stand at the LP and return to stop the RTA and then the signal generator.
> I usually end up with maybe around 160 - 180 averages and the process takes maybe 30 sec.

This process is not noticeably sensitive to mic handling, body position, or to mic LP starting/ending positions or from one setup to another on different days. It is very repeatable. I get very similar result in my room whether I use a vertical window or a horizontal window or a spirial pattern incorporating both.

I have verified that this process results in a similar result to averaging many sweep measurements over the same window area and it is much quicker an easier to do.

I posted several charts Here that help to show some the experimentation that was done.

I don't want to over sell this method though. I am sure that reasonable results can be obtained using only the LP mic sweep using judicious EQ application. This method just accounts for the excessive SPL variability when using very small mic capsule and helps to assure that EQ is not overly applied.

In the context of this OP's question, it is a method to minimize or avert the issue of a close boundary on the measurement. It may be easier than moving a large chair and should provide a better result than any one mic location with or without the chair in place.
Very nice, and of course once you think of it, makes perfect sense. I have been giving thought to averaging averaging measurements at the LP when hand tuning, as you have mentioned in other posts, will give it a try next time I am in that mode.

Thanks.
08-14-13 09:32 AM
jtalden
Re: Microphone stand for measurements at ear height ?

I mean "b".

In my case, I:
> Set the RTA to "Forever Averaging".
> Place mic on stand at LP.
> Start Signal generator then RTA.
> Move quickly to mic, remove it from the stand and slowly sweep around the listening window chosen.
[I use a vertical zigzag pattern moving up and down out to the right and back to the center and then out to the left and back to the center but any pattern covering the window reasonably uniformly will work.]
> Replace the mic in the stand at the LP and return to stop the RTA and then the signal generator.
> I usually end up with maybe around 160 - 180 averages and the process takes maybe 30 sec.

This process is not noticeably sensitive to mic handling, body position, or to mic LP starting/ending positions or from one setup to another on different days. It is very repeatable. I get very similar result in my room whether I use a vertical window or a horizontal window or a spirial pattern incorporating both.

I have verified that this process results in a similar result to averaging many sweep measurements over the same window area and it is much quicker an easier to do.

I posted several charts Here that help to show some the experimentation that was done.

I don't want to over sell this method though. I am sure that reasonable results can be obtained using only the LP mic sweep using judicious EQ application. This method just accounts for the excessive SPL variability when using very small mic capsule and helps to assure that EQ is not overly applied.

In the context of this OP's question, it is a method to minimize or avert the issue of a close boundary on the measurement. It may be easier than moving a large chair and should provide a better result than any one mic location with or without the chair in place.
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