Better to turn off the radio, shut the door on competing noises, if possible.

如果可能，最好关掉收音机、关上门挡住繁杂的噪音。

youdao

Please turn on (off) the radio.

请把收音机打开(关上)。

youdao

You can move your radio around your house and turn on and off some utilities, from the volum of the noise you may find the direction.

你可以移动你的收音机在房子周围并打开或关闭一些电器、噪音的大小你会发现方向。

youdao

Suppose you turn off your radio station a few seconds before 2pm and turn it back on a few seconds after the 30-second test concludes?

FORBES: Will Right-Wing Radio Skip The National Emergency Test?