| 摘要 |
<p>The present invention provides a method of controlling an acoustic transducer array to generate a directional sound profile, the method including the steps of: (i) controlling the transducer array to generate, on the basis of a first signal, a primary sound profile which, when represented in polar coordinates, has a primary lobe extending along a first axis and an auxiliary lobe, associated with the primary lobe, extending along a second axis which is respectively different to the first axis; and (ii) generating, on the basis of the first signal, a cancelling signal for controlling the transducer array to generate a cancelling sound profile which, when represented in polar coordinates, has a cancelling lobe extending along said second axis, which cancelling lobe is modified in phase to interfere destructively with said auxiliary lobe.</p> |
