Multi-Microphone Speech Enhancement - =1=Using LCMV ...
Multi-Microphone Speech Enhancement - =1=Using LCMV ...
Multi-Microphone Speech Enhancement - =1=Using LCMV ...
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Setup<br />
Binaural <strong>LCMV</strong><br />
Experimental Study<br />
Hearing device:<br />
2 hearing aid devices mounted on B&K HATS, with 2 microphones,<br />
2cm inter-distance.<br />
A 9 × 5 utility device with 4 mics. at the corners, average distance<br />
3.5cm. The device placed on a table at a distance of 0.5m.<br />
Signals:<br />
1 desired speaker, θ d = 30 o , 1m (constrained).<br />
1 interference speaker at θ i = −70 o , 1m (constrained).<br />
1 directional stationary noise, θ n = −40 o , 2.5m (unconstrained).<br />
SIR=0dB, SNR=14dB.<br />
Acoustic lab:<br />
Dimensions 6 × 6 × 2.4; Controllable reverb. time T 60 = 0.3s.<br />
STFT:<br />
Sampling frequency 8kHz, 4096 points, 75% overlap.<br />
Algorithm Cue gain factors:<br />
Desired speech - η = 1.<br />
Interference speech - µ = 0.1 (20dB attenuation). Back<br />
S. Gannot (BIU) <strong>Multi</strong>-<strong>Microphone</strong> <strong>Speech</strong> <strong>Enhancement</strong> IWAENC 2012 53 / 53
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