The Z9 uses revolutionary proprietary DSP software know as the BlueAnt Voice Isolation Technology which uses sophisticated techniques to separate the voice signal from the noise using dual microphone array of the Z9. As a result, this technology is effective against all noise sources whether they are stationary, impulsive or even the sound of other voices.The BlueAnt Z9 separates the desired voice signal from all of the background noise including wind nose, resulting in crystal clear conversation in the noisiest environments.In addition to the background noise elimination, the Z9 eliminates this echo, allowing for true full duplex operation. Effective at elimination the acoustically coupled signal that can cause annoying echo in Bluetooth headsets operated at high volume. As the Z9 treats all sounds as distinct separate signals, wind noise is this defined as a separate signal from the users voice and is reduced or eliminated. This system works better than any other Bluetooth headset on the market.Automatic Speech recognition performance is dramatically improved by the clear voice. Free from background noise. This allows the user to have a greater percentage success rate in using voice commands with mobile phones.