| 摘要 |
<p>A broadside small array microphone beamforming unit comprises a first omni- directional microphone to generate a signal X1 (t), a second omni-directional microphone to generate a signal X2(t), a first delay unit delaying the signal X1 (t) to generate a signal X1(t-T), a second delay unit delaying the signal X2(t) to generate a signal X2(t-T), a first substrator subtracting the signal X1(t-T) from the signal X2(t) to generate a signal R(t)=X2(t)- X1(t-T), a second substrator subtracting the signal X2(t-T) from the signal X1 (t) to generate a signal L(t) =X1(t)- X2(t-T), a third delay unit delaying the signal R(t) to generate a signal R'(t)=R(t-D), a gain function unit convoluting the signal L(t) with a gain function G(t) to generate a signal L'(t)=L(t)*G(t-i), and a substrator subtracting the signal L'(t) from the signal R'(t) to generate a signal B'(t)= R'(t)-L'(t).</p> |
