他摆摆手要她把声音放低点。用英语怎么说？

他摆摆手要她把声音放低点。

He signed her to lower her voice.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

signed

adj. 有符号的，有正负之分的；

例句
The two countries signed an agreement to jointly launch satellites.
两国曾签订了联合发射人造卫星的协议。

her

pron. (she的宾格)她，(she的所有格)她的，她，指某个国家，（一艘）船；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

lower

adj. 下方的，在底部的，较低级的；v. 降低，减少，缩小；

例句
...a speech in which he affirmed a commitment to lower taxes...
他作出减税承诺的演讲

voice

n. 嗓音，（动词的）语态，呼声，发言权，歌唱才能；vt. 发音，表达，说出，给（一部乐曲）配上声部，给（如管风琴音管）整声；

例句
Her voice is passionate. Her eyes are ablaze.
她声音激昂，目光如火。