Omnidirectional Microphone Capsule

The omnidirectional polar pattern of a microphone, such as the IMM-6C, offers a wide range of benefits and capabilities. By using an omnidirectional electret condenser capsule, this microphone is designed to capture sound equally from all directions. Whether you're assessing the acoustics of a concert hall, a recording studio, or a home theater, this microphone can accurately capture the spatial characteristics and reverberation within the space. When it comes to measuring the output of a speaker driver, an omnidirectional microphone ensures that you capture the sound emitted from all angles. This provides a comprehensive representation of the speaker's performance, enabling you to analyze its frequency response, distortion levels, and other important characteristics.

Note: In order to use your iMM-6C as a calibrated measurement microphone you may be required to purchase an app for your tablet or smart phone. Dayton Audio suggests AudioTool for Android and Audiotools for IOS

Specifications:

• Capsule Type: Precision 6mm electret condenser
• Polar Response: True Omnidirectional
• Frequency Response: 18-20,000Hz ±0.5dB (calibrated)
• S/N Ratio: 70dB (A-Weighted, varies depending on host device)
• Connector: USB-C

Dayton Audio Microphone Calibration Download

Adapter for 1/2" Calibrator

Every iMM-6C microphone includes a unique calibration file, but using a sound level calibrator is still the most reliable way to confirm accuracy when switching between phones, tablets, and audio interfaces. A calibrator provides a fixed reference level, allowing you to quickly compensate for the varying input sensitivities these devices and their measurement apps often introduce. To make this process simple, we offer a 3D-printable adapter that allows the iMM-6C to fit properly into many popular 1/2" calibrators. Download the 3D files below.

Note: For this print we recommend using PLA or PLA+; other materials may require size adjustments due to shrinkage. Print with 100% infill for the best fit and durability.

Help for Android and iPhone users:

There are many applications in the market that provide users with audio measurement software. We do not recommend any specific apps, however, in an attempt to assist the new user of an iMM-6C, we have listed links and some helpful pointers below. One for the Apple/iPhone platform and the other for Android devices.

Android - AudioTool from JJBunn

Here is the procedure for loading the iMM-6 calibration file into AudioTool on an Android device:

• 1) Visit the Dayton Audio Calibration File Download Tool on your web browser: Dayton Audio Calibration Download Tool.
• 2) Find your iMM-6C serial number on the back of your iMM-6C Case.
• 3) Select "iMM-6" microphone, enter the serial number, and press search. Download and save the calibration file by clicking on it.
• 4) Open the AudioTool app on your device. Open the Menu at the bottom of the screen and select "Use 1/3 Octave Calibration" to ensure you have the 1/3 octave calibration method selected (if "Use 1/3 Octave Calibration" is not shown in the menu then it is already selected).
• 5) Open the Menu at the bottom of the screen, and select "Import Cal File". You will be shown the Android file browser.
• 6) Locate the iMM-6C calibration file you downloaded in step 3, and click on it. This will import a copy of the calibration file into the AudioTool directory (there is no need to rename the file to .cal, or make any other changes).
• 7) Open the Menu at the bottom of the screen again and select "Load Cal".
• 8) Select your calibration file (for example: CMM10000).
• 9) The calibration data will be loaded and summed to the 1/3 octave bins used by AudioTool, and saved in your Preferences - there is no further need to load the file whenever you start AudioTool, unless you change the calibration method or microphone.

iPhone - AudioTools from Studio Six Digital

Here is the procedure for loading the iMM-6C calibration file into Audio Tools on an iPhone:

• 1) Visit the Dayton Audio Calibration File Download Tool on your iOS device: Dayton Audio Calibration Download Tool.
• 2) Find your iMM-6C serial number as pictured (on the back of your iMM-6C case).
• 3) Select "iMM-6" microphone, enter the serial number, and press search. Download and save the calibration file by clicking on it.
• 4) Open the "AudioTools" App.
• 5) Open the "Microphone Setup" Menu.
• 6) Make sure your iMM-6C is now connected to your device. It will say "Headset Mic 1" when connected. If it says "Internal Mic 1", your iMM-6C is not connected.
• 7) Press the (i) button to the right of your screen.
• 8) Press the "Calibration File" button labeled in blue.
• 9) Press "Import" at the bottom of the screen. You will then see the file you just downloaded. Click on it.
• 10) It will now show up in your list of calibration files. Click on it and then press import at the bottom of the screen.
• 11) The calibration is now installed in the "Sound Tools" app!