These audios start with a frequency that is close to your normal relaxed brainwave frequency to allow your brain to easily become entrained. These sounds are the new and improved series of the popular NeuroSonic Calibrators. They use the powerful Holomni-sound technology to follow a special flow that guides you to a deep trance brainwave state: Theta. Use these sounds to integrate affirmations or visualizations firmly in your subconscious. Brainwave Frequency: Alpha to Alpha/Theta border | MonAural: 11 – 7 – 11 hz | Isochronic: 12 – 8 – 12 hz.