公开(公告)号：US20070230720A1

公开(公告)日：2007-10-04

申请号：US11568179

申请日：2005-04-22

Applicant: Lars Stromback

Inventor： Lars Stromback

IPC: H04R23/00

CPC classification number: H04R1/22 ,  F04D29/305 ,  F04D33/00 ,  F05D2270/62 ,  H04R23/00

Abstract: Loudspeaker ROTOSUB including a motor driven rotor provided with wings or blades that are adjustable to their pitch and where the pitch is modulated by a signal, in particular electric, corresponding to a desired sound. In particular at very low frequencies the loud speaker rotor that during each sound wave length has time to rotate many revolutions can move large amounts of air that in turn can provide a large air and sound pressure. The technic is based on the generation of sound waves by modulating the angles of the wings. At low frequencies the rotor has time to rotate several revolutions per signal cycle which provides increased pressure. Since the wings can be pivoted in arbitrary angles the pressure can be controlled in the desired way.

Abstract translation: 扬声器ROTOSUB包括一个电机驱动的转子，其具有可调节到它们的音调的翼或叶片，并且其中音调被对应于期望声音的信号特别是电调制。 特别是在非常低的频率下，在每个声波长度有时间旋转许多转数的扬声器转子可以移动大量的空气，这又可以提供大的空气和声压。 该技术基于通过调节翼的角度来产生声波。 在低频时，转子有时间在每个信号周期旋转几圈，这提高了压力。 由于翼可以以任意角度枢转，所以可以以期望的方式控制压力。