An active adaptive noise control system in ducts is proposed, which adopts a motional feedback loudspeaker not only as an noise controlling actuator but also as a detecting sensor.

介绍了一种采用动反馈式扬声器的管道有源自适应噪声控制系统，系统中动反馈扬声器既作为有源消声系统的执行元件，也作为检测控制效果的声传感器。

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Named Hanwell, this active loudspeaker embodies Marshall's legacy of loud.

ENGADGET: Marshall's Hanwell HiFi speaker is bred from guitar amps, at-home with your PMP (update)