From the iZotope website:
By evaluating audio levels in terms of how the human ear perceives loudness, loudness meters are used to ensure a mix complies with broadcast regulations, like those specified by the Advanced Television Standards Committee and European Broadcasting Union. Fully compliant with the ITU-R BS.1770-1, ITU-R BS.1770-2, ITU-R BS.1770-3, and EBU R128 standards, Insight provides the tools you need to be confident that your audio meets regulations.
Insight's innovative Surround Scope helps you visualize how your surround project will be spatially perceived by your audience during playback, and also keeps you aware of any potential technical problems with your audio's alignment.
Unlike typical "waterfall" plots, Insight's unique real-time 3D spectrogram creates a detailed topographical map of audio using iZotope's high-resolution spectrogram capabilities. Unfamiliar with a spectrogram? Watch our video to learn more.
For eye-popping visual insight, feed information on multiple audio streams to the Spectrogram via Meter Taps. Add Meter Tap plug-ins to individual tracks or buses, then open the Spectrogram to see how mix elements combine in rich detail...all in real-time.
Insight's resizable Stereo Vectorscope provides useful display options for examining the stereo image of your mix.
Insight also includes a real-time spectrum analyzer for examining the frequency balance of your mix.
With a wealth of options for personalizing your metering experience, Insight lets you visualize your audio in a way that's perfect for any project or session.