Problem: Railroad locomotive traction motors were unjustifiably failing vibration condition tests causing unnecessary tear-downs to be performed.
Problem: Develop a system employing an array (2 to 8) of earpiece microphones to sense user's speech with high fidelity and simultaneously reject environmental noise using vector noise cancellation techniques.
Problem: DSP-based systems take an unduly long time to develop, with the bulk of the time wasted in converting the algorithm to C code.
Problem: The AFRL (Air Force Research Laboratories) was seeking hearing protection improvements for use in high-noise environments. While protection of hearing is essential, communication is also essential to safety. Engineers developing improved hearing protection had to take both objectives into consideration.
Cancellation Application [PDF]Problem: The implementation of active noise cancellation into deep-insertion earpieces required DSP hardware with a very low turnaround time. Physical constraints in the problem force the total turnaround time for input, processing, and output to be less than 30 microseconds. An off-the-shelf solution that satisfied all of the requirements for this effort could not be found.