| CPC H01Q 21/26 (2013.01) [H01Q 1/246 (2013.01); H01Q 1/521 (2013.01); H01Q 3/02 (2013.01); H01Q 5/45 (2015.01); H01Q 9/285 (2013.01); H01Q 19/108 (2013.01)] | 12 Claims |

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1. A low-frequency vibrator unit, comprising:
a plurality of vibrator arms (1) comprising an extension branch (11) and a bending branch (12), wherein the extension branch (11) is oriented towards a peripheral side of the low-frequency vibrator unit, and the bending branch (12) is oriented towards the bottom of the low-frequency vibrator unit; and
a director (2) provided at the top of the low-frequency vibrator unit and having intervals with the plurality of the vibrator arms (1), wherein the director (2) has a window (21), and at least part of the window (21) corresponds to an orientation of each extension branch (11).
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