| 摘要 |
The present invention relates to a method for generating a directional sound signal (y(k)) from first and second sound signals (x 1 (k), x 2 (k)), which are generated by a first and a second microphone (M1, M2), which are separated by a distance (D). The method comprises generating first and second differential sound signals (x f (k), X b,DEQ (k)) based on the first and second sound signals (x 1 (k), x 2 (k)), and generating the directional sound signal (y(k)) according to a frequency-dependent directional response pattern based on the first and second differential sound signals (x f (k), X b,DEQ (k)). The generating of the second differential sound signal (X b,DEQ (k)) comprises generating a difference signal (xb(k)) of the first and the second sound signals (x 1 (k), x 2 (k)) and a frequency-selective processing that depends on a steering angle (a), which indicates a desired direction of maximum attenuation of the frequency-dependent directional response pattern, wherein the frequency-selective processing adjusts the actual direction of maximum attenuation of the frequency-dependent directional response pattern to correspond to the steering angle (α) substantially independent of frequency (ω) over the frequency range of the directional sound signal (y(k)). |
