On 590 simulated room impulse responses, spectral subtraction with an energy-decay RT60 estimator raised Chirp decode rates from 54.53% to 79.78% for audible signals and from 86.15% to 92.11% for ultrasonic signals.
Effects of reverberation on speech recognition in stationary and modu- lated noise by school-aged children and young adults,
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Estimating & Mitigating the Impact of Acoustic Environments on Machine-to-Machine Signalling
On 590 simulated room impulse responses, spectral subtraction with an energy-decay RT60 estimator raised Chirp decode rates from 54.53% to 79.78% for audible signals and from 86.15% to 92.11% for ultrasonic signals.