“扬声”的英语可以翻译为：loudspeaking ...

“是塞伯吗？”他扬声问道。"Seb?" he said, with a rising inflection.弗洛拉·曼胡德两眼盯住布丁,扬声尖叫.Flora Manhood squealed , her eye on the Torte.听起来好像他从车里的免提扬声电话打来的.It'sounded like he was calling from a hands - free speakerphone inside a car...