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Near-field null and beamforming

机译:近场零陷和波束成形

摘要

Devices and methods are disclosed that allow for selective acoustic near-field nulls for microphone arrays. One embodiment may take the form of an electronic device including a speaker and a microphone array. The microphone array may include a first microphone positioned a first distance from the speaker and a second microphone positioned a second distance from the speaker. The first and second microphones are configured to receive an acoustic signal. The microphone array further includes a complex vector filter coupled to the second microphone. The complex vector filter is applied to an output signal of the second microphone to generate an acoustic sensitivity pattern for the array that provides an acoustic null at the location of the speaker.
机译:公开了允许用于麦克风阵列的选择性声学近场零陷的设备和方法。一个实施例可以采取包括扬声器和麦克风阵列的电子设备的形式。麦克风阵列可以包括第一麦克风和第二麦克风,第一麦克风与扬声器相距第一距离,第二麦克风与扬声器相距第二距离。第一和第二麦克风被配置为接收声音信号。麦克风阵列还包括耦合到第二麦克风的复数矢量滤波器。将复数矢量滤波器应用于第二麦克风的输出信号,以生成用于阵列的声学灵敏度模式,该阵列在扬声器的位置提供声学零点。

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