Noise-immune speech transduction using multiple sensors

In this ongoing work, we have developed and tested configurations of multiple sensors for transducing speech with enhanced immunity to acoustic background noise. In this paper, we describe our work to improve upon our previously reported two-sensor configuration consisting of an accelerometer and a gradient microphone, and also present several additional multisensor configurations including one that uses a second-order gradient microphone for low frequencies and a first-order gradient microphone for high frequencies. Results from formal speech intelligibility and quality tests in simulated fighter aircraft cockpit noise show that each of the multisensor configurations tested outperforms the constituent individual sensors.