This calibrated microphone is a professional-quality measurement and recording microphone that is designed to work with the entire suite of Apple “iDevices” – iPad, iPhone, and iPod. The rugged construction and compact size make it the perfect companion for audio professionals who must work on-location performing acoustic analysis, monitoring audio levels, or recording. Each iMM-6 is individually hand-calibrated using a laboratory-standard measurement microphone, for consistent, repeatable measurements that match the level of precision previously offered only by expensive stand-alone microphones.

It is also compatible with Android and Microsoft devices that use a 3.5 mm TRRS jack. A headphone/line-out is built in for monitoring the recorded signal, and a kickstand elevates and angles the measurement capsule for more direct measurements. Each iMM-6 is ruggedly built with high-quality components. A sturdy carrying case with foam insert is included.

This product can be used with AudioTools app by Studio Six Digital on Apple and AudioTool app by Bofinit Corporation on Android.

http://www.daytonaudio.com/index.php/test-measurement/imm-6-idevice-calibrated-measurement-microphone.html

http://www.parts-express.com/videos/video.cfm?Video_ID=2986
Turn an iPad®, iPhone®, or iPod® touch into a laboratory grade audio measurement device with a calibrated measurement microphone.
Do a search in your favourite Apps store for compatible software. Excellent solution for room calibration, speaker analysis for installers, PA, roadies, hobbyists.

Capsule type: Precision 6 mm electret condenser
Polar Response: True Omnidirectional
Frequency response: 18-20,000 Hz (Calibrated)
Impedance: 200 ohms
Sensitivity at 1 kHz into 1K ohm: 10 mV/Pa (-40dBV, re. 0dB = 1V/Pa)
Maximum SPL for 1% THD @ 1,000 Hz: 127 dB
S/N ratio: 70 dB (A-weighted, varies depending on host device)
Connector: Gold-plated 3.5 mm TRRS
Weight: Ultra-light 7.6 grams.

Quick Reference Guide (.pdf) 390-810-dayton-audio-imm-6-quick-reference-guide

NIOSH-ASA_Evaluation-of-Smartphone-Sound-Measurement-Apps-Using-External-Mic