The Dynamic Feedback Cancellation system

Phase cancellation, not gain reduction!
Not only does the Dynamic Feedback Cancellation system eliminate on-going, static feedback caused by the gain setting and the earmould fit; it also responds to more dynamic changes caused by actions such as chewing and hugging.

To combat these changes the DFC system sends an out-of-phase counter signal at exactly the same frequency. This removes the whistling without decreasing the level of gain. Adjustments are completed within milliseconds, without disturbing the child.

Click on the image below to try the DFC system demo. Note that you need 'Macromedia Flash Player' on your PC. If you need to install this program, you can download it here for free.