Active Occlusion Cancellation (AOC)

Transparent Perception of the Own Voice

• Own voice doesn't sound any longer like "talking in a barrel", even with closed in-ear headphones
• Utilizes state-of-the-art active noise control techniques and talk-through filters, designed to equalize the perception of your own voice

Guaranteed Stability of Control Algorithms

• Specific filter design principle guarantees “stability by design” for common use cases
• Optional additional safety net algorithm for unseen use cases

Switchable to ANC and Digital Ear-Opening

• On-the-fly change of filter characteristics for “classical” active noise cancellation or talk-through mode

For In-Ear and Over-The-Ear Headphones

• Based on device-specific acoustic measurements
• Flexible (re)configuration by exchange of algorithm parameters

[liebich16a]
Stefan Liebich, Carlotta Anemüller, Daniel Rüschen, Steffen Leonhardt, Peter Jax, and Peter Vary
Active Noise Cancellation in Headphones by Digital Robust Feedback Control
Proceedings of European Signal Processing Conference (EUSIPCO), August 2016

[liebich16b]
Stefan Liebich, Peter Jax, and Peter Vary
Active Cancellation of the Occlusion Effect in Hearing Aids by Time Invariant Robust Feedback
ITG-Fachtagung Sprachkommunikation, October 2016

[liebich18a]
Stefan Liebich, Jan-Gerrit Richter, Johannes Fabry, Christopher Durand, Janina Fels, and Peter Jax
Direction-of-Arrival Dependency of Active Noise Cancellation Headphones
Proceedings of the 2018 ASME International Conference and Exposition on Noise Control (INTERNOISE), August 2018

[liebich18c]
Stefan Liebich, Johannes Fabry, Peter Vary and Peter Jax
Signal Processing Challenges for Active Noise Cancellation Headphones
ITG-Fachtagung Sprachkommunikation, October 2018