Using Exteral Microphones and Calibration

[bikeamtn]

Would I be correct in saying?
SoundMeter (and other FaberAcoustical app's) should be able to use an ext. mic such as the MicW i436 Calibrated Measurement Type 2 External Mini Microphone for iPad, iPhone, and iPod Touch. Also; since such mic's come with caliberation data, you can simply manually enter this data into the application and all should now be calibrated.

Would this assumption be correct? Thanks
 

[FaberAST]

bikeamtn,

Yes, you can use the i436. However, the i436 is still subject to the high pass filter that Apple applies to the headset mic input of iOS devices (even Macs with headset support apply a filter). Frequency response plots of the filter can be found on our blog.

You can just enter the sensitivity of the mic in mV/Pa to get accurate readings (except at frequencies affected by the filter), although a proper calibration is still generally recommended.

Ben

[bikeamtn]

Forgot about the high-pass filter (applied to headset). Internal mic is the way to go for now.

Thanks

[FaberAST]

Please keep in mind that the same high pass filter is applied to the built-in mic. We need enough people to tell Apple of their desire to bypass the filtering. Perhaps, someday Apple will enable us to bypass those filters.

Ben