对听众讲话时，请把声音放大。

Please raise your voice in addressing an audience.

youdao

扩音器是一种使声音放大的电气装置。

Amplifier is electrical device which make sounds louder.

youdao

他们解决了声波是怎样在数百万计的碰撞中产生的，并将其声音放大1018倍使人耳可以听得见。

They worked out how sound waves would react between the millions of collisions and then multiplied the noise by roughly 10 billion billion to make them audible to humans.

youdao

And they are wearing headphones that amplify their heartbeat and they are asked among other things how attracted are they to the centerfold photograph that they're looking at.

受试者带着耳机,放大心跳声音的耳机,问了他们很多事情，其中包括他们认为,插页中的裸女多有魅力。

耶鲁公开课 - 心理学导论课程节选