Overview
Acoustic Measurements Just Got Easier
Dayton Audio's OmniMic V2 was developed in collaboration with Liberty Instruments, inventors of the Praxis analysis tool. Powerful, versatile, yet easy to use, the OmniMic V2 will become an indispensable part of your audio toolbox— whether for testing individual speaker components or entire in-place audio systems of every description. The OmniMic V2 provides quick and accurate measurements that will reduce installation time, saving you both labor and money.
Features
- Updated software and improved hardware
- Compact, portable, accurate, affordable
- Intuitive software--open the box, start testing in minutes
- Perfect for setting up home theater systems
- Optimized for use with netbooks and laptops
- Accurate response from 5 to 20,000 Hz using the unique calibration files
- For professionals and hobbyists--design and tune speaker systems and arrays
- Includes Omnicim V2 microphone, protective carrying case, compact mic stand, mic clip, and 10 foot USB cable
Measurements
OmniMic V2 is capable of an array of measurements that are great for all audio engineers.
- SPL meter with A, B, C, or no weighting
- Spectrum analyzer, FFT, or RTA
- Frequency response with phase and impulse response
- Oscilloscope function to view complex waveforms
- Harmonic distortion: 2nd, 3rd, 4th, 5th harmonics plus THD
- RT60 reverberation: measures sound reflection
- Bass decay function identifies room modes and helps determine proper subwoofer placement
- Polar Plotting, in flat or 3D radar format
- Wavelet Spectrogram (color) to the Waterfall group
- Polar Plotting, in flat or 3D radar format
- Wavelet Spectrogram (color) to the Waterfall group
- Curve Math for live or added curves
- Auto-naming of repeated FRD measurements; updated
- Snapshots to PNG, BMP, JPG or WMF formats
- Measurement down to 5 Hz
- Energy-Time Curves, with configurable band limiting
- Supports new file-based microphone calibration
- Expanded Help Files
- Printer selection
Frequency & Impulse Response
Frequency Response is a curve that shows how strongly an audio system reproduces different parts of the frequency range. A frequency response is related to its "impulse response" (the pressure signal that a speaker or sound system would make if it were fed by an extremely short pulse). Up to 40 saved Frequency Response curves (previously saved in "FRD" files) can be displayed on-screen simultaneously with the currently measurement.
Polar Response
The purpose of a Polar Display is to reveal how the frequency response of a loudspeaker varies with horizontal or vertical angles from the baffle. Speaker designers generally design loudspeakers for a specified (usually, flat) frequency response at a position on-axis of a speaker and at some assumed distance from the baffle.
Harmonic Distortion
Harmonic distortion is the unwanted addition of new tones to the original audio signal. These distortion products occur at multiples of the original frequency and are centered on the harmonics of the original. For example, a 1kHz fundamental that has been subjected to harmonic distortion will produce energy at 2kHz (2nd harmonic), 3kHz (3rd harmonic), 4kHz (4th harmonic), and so on. Omnimic V2 will display 2nd thru 5th harmonics along with the total harmonic distortion.
Cumulative Spectral Decay
A waterfall (or CSD) illustrates, on a 3-D graph, how a speakers' energy decays or is radiated over a range of frequencies. Waterfall plots are used by driver and loudspeaker designers for driver selection, to identify resonances or reflections, and to view driver and waveguide behavior.
Energy Time Curve
The curve shown is the energy relative to the level of the energy in the first peak as an impulse comes from the speaker and reflects around the room. In other words, imagine the speaker sent out a sudden pulse rather than the sweep this test uses.
SPL Meter / Spectrum Analyzer
The SPL (sound pressure level) meter allows you to measure how loud your source is while the spectrum analyzer shows you the relative SPL of frequency bands.
Oscilloscope
Use the Oscilloscope to view any sound waveforms. These might include music, your voice, or waveforms played by loudspeakers.
Bass Decay
Use the Bass Decay analyzer to measure how bass notes decay in a room. This is a great measurement to understand how the room affects the low end.
Calibrate Your OmniMic V2
A unique serialized calibration .txt file will be available for your OmniMic V2. Once you receive your microphone, Visit the Dayton Audio calibration download tool where you will be prompted to enter the serial number found on the base of your calibrated OmniMic V2. After entering the serial number, your unique calibration .txt file will be available for you to download.
cALibration Download tool
Test Signals
The OmniMic V2's test signals will be initiated directly from the host computer, or use the optional OmniMic V2 Test CD to play the signals from a CD player. System includes calibrated USB microphone, rubberized mic clip, 6 ft. USB 2.0 cable, desktop tripod stand, and carrying case. Compatible with Windows XP, Vista, Windows 7, Windows 8, and Windows 10.
For use with home theater surround sound systems, the OmniMic V2 5.1 Channel Test DVD is now available! Now, make home theater measurements with the ease and speed of the OmniMic V2!
Note: Windows 10 and 11 Users
Microsoft .net Framework 3.5 is required for the Omnimic V2 software to run properly. This is not installed by default in Windows 10 or 11.
Note: Windows 8 Users
Windows 8 has a USB recording bug. To get around this issue and use the OmniMic V2 on a machine using Windows 8, please perform the following:
Find the OmniMic V2 icon, Start Menu entries, etc., that you use to start the OmniMic V2 software. Instead of left-clicking the icon, right-click and then left-click on the "Properties" menu item. A "Properties" window should open. Select the compatibility tab and find a checkbox labeled "Run this program in compatibility mode for:" There is a drop-down box just below the checkbox, set that to "Windows XP (Service Pack 3)". Then put a check in the checkbox and click "Ok" to close the properties windows.
Now when you start OmniMic V2 using that icon (or menu item), it will run in the XP mode that avoids the Windows 8 USB recording bug.
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