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61
SoundMeter / Re: Dayton Audio iMM-6 External Mic
« Last post by Bruce on March 12, 2015, 05:16:30 PM »
Hi Ben, appreciate the help...I'll do what you have recommended.

Cheers...Bruce
62
SoundMeter / Re: Dayton Audio iMM-6 External Mic
« Last post by FaberAST on March 12, 2015, 04:27:41 PM »
Bruce,

I'm sorry, I obviously misread your post.

Are you looking for frequency response compensation (FRC) or sensitivity calibration? If you are looking for FRC, it is not supported in SoundMeter. FRC only works with FFT-based spectrum analysis.

If you are looking for sensitivity calibration, then you would need to enter the iMM-6's acoustic pressure sensitivity in the Input Channels calibration screen (there is calibration tutorial information in SoundMeter's built-in documentation).

The iMM-6's calibration file includes the mic's overall sensitivity on the first line. (You can download the file directly at http://www.daytonaudio.com/iMM6_Lookup_Tool/iMM_Text/99-00192.txt, where you replace "00-00192" with your own mic's serial number.)

The nominal sensitivity for the iMM-6, given by Dayton, is -40 dB, where 0 dB = 1V/Pa. To convert that to V/Pa (to enter into SoundMeter), you need to raise 10 to the power of the sensitivity divided by 20. That is, 10^(-40/20) = 0.01 or 10 mV/Pa (which Dayton also gives as a nominal sensitivity). The sample file they provide has a sensitivity of -37.4 dB, which equates to a sensitivity of 10^(-37.4/20) = 13.49 mV/Pa, which you could enter into SoundMeter either as "13.49m" or "0.01349" (SoundMeter can recognize the "m" and format the number appropriately).

Keep in mind that you need to have the headset input device units set to "V" and the headset input channel units set to "Pa" in order for this to work. Also, you'll still have a nominal calibration. If you need a more accurate calibration, I would recommend performing a relative calibration against another sound level meter that you know has been accurately and properly calibrated. (I recommend this, regardless of which or whose iOS sound level meter app you are working with.)

Please let me know if you have questions about any of this.

Ben
63
SoundMeter / Re: Dayton Audio iMM-6 External Mic
« Last post by Bruce on March 12, 2015, 03:53:08 PM »
Hi, the Dayton UMM-6 is a USB device.  I've purchased the Dayton Audio iMM-6, this microphone connects via the TRRS headphone jack.  Some apps such as Studio Six Digital import the calibration file provided by Dayton Audio.  I though the Faber app may have provided similar functionality.

The following link from Dayton shows the procedure for the Studio Six app.
http://www.daytonaudio.com/index.php/imm-6-idevice-calibrated-measurement-microphone.html

Cheers...Bruce
64
SoundMeter / Re: Dayton Audio iMM-6 External Mic
« Last post by FaberAST on March 12, 2015, 10:40:03 AM »
Bruce,

Here's an excerpt from a recent blog post regarding SoundMeter's hardware support:
Quote
The new SoundMeter apps also support the Dayton UMM-6 USB measurement microphone. When the UMM-6 is detected, the user will be prompted to enter its serial number, which is typically printed on a label on the UMM-6. If a valid serial number is entered, SoundMeter will automatically download a calibration file from Dayton’s website and set the microphone sensitivity based on the information in the file.

Note: The Dayton UMM-6 must be connected to your iOS device via Apple’s USB camera adapter (either for Lightning or 30-pin dock connector, depending on your device). Sometimes the UMM-6 shows up in iOS as USB PnP Sound Device. If that happens, unplugging the UMM-6 and plugging it back in will generally solve the problem (it may take 2 or 3 tries). When properly connected, “UMM-6″ will appear as the input device name in SoundMeter’s toolbar (at the top of the screen).

This should work the same on any iOS device that runs the current version of SoundMeter.

Please let us know if you have other questions.
65
SoundMeter / Dayton Audio iMM-6 External Mic
« Last post by Bruce on March 11, 2015, 11:45:42 PM »
Hi, is it possible to calibrate a Dayton iMM-6 to an iPhone 4 running SoundMeter 7.0.1.  Any assistance would be very much appreciated.

Cheers...Bruce
66
SoundMeter / Re: Calibration - micW i436
« Last post by FaberAST on November 19, 2014, 09:09:57 AM »
For the i436, you can follow these instructions. This assumes that the sensitivity of your i436 is 6.7 mV/Pa. You should substitute the factory-calibrated sensitivity that you received with your i436.

Launch SoundMeter.
Plug in the i436.
Tap the gear button in the toolbar at the top of the main screen in SoundMeter.
Then, tap on I/O Device Configuration to find the Input Options menu.
Make sure the Input Device is "Headset Microphone".
Make sure Device Units is set to "V".
Then, tap on Input Channels and make sure that All Channels units is set to "Pa".
Under CH1, tap Calibrate, and in the Input Sensitivity text box you can enter "6.7m" or "0.0067" to make sure that your input sensitivity is set to 6.7 mV/Pa.
If the Input Sensitivity text box shows units other than mV/Pa, then you must have missed one of the earlier steps.
67
SoundMeter / Calibration - micW i436
« Last post by olaa2618 on November 10, 2014, 07:43:26 AM »
Hi,

Is it possible to "calibrate" the micW i 436 by just entering data (from the mic data sheet) into Sound Meter, or do I need to calibrate with a test tone generator + another instrument?

Best
O
68
Electroacoustics Toolbox / Latest ver.
« Last post by AudioFixer on November 06, 2014, 02:53:43 AM »
Thn´x a lot for latest update. Yosemite & ver. 3.6 looks nice and testing are in progress.
69
RoomScope / Is it possible to use the IR's of Roomscope in TL Space?
« Last post by embav on October 29, 2014, 03:44:05 AM »
Has anyone experience in using IR's taken with Roomscope and
use them in IR Reverb's like TL Space and Altiverb?
kind regards Eric
70
SoundMeter / Data logging
« Last post by Ron Westerveld on October 22, 2014, 01:37:59 AM »
Is it possible to start a measurement for 15 minutes, save it automatically en restart a new measurement and so on and on. I will try to monitor festivals during the day at the Front Of House position. At this moment I need to save the measurements and restart it manually. Hope someone can help me!
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