This lesson is actually an English listening level test.

这节课其实是一个英语听力水平测试。

But don't worry, you don't have to be at an advanced listening level to participate and understand.

不必担心，听懂和理解这节课，你不需要具备高级听力水平。

It reminds people to use their technology to stay safe. Smart phone apps can help to monitor safe listening levels.

还提醒人们使用技术来保证安全，智能手机应用可以帮助人们检测声音等级。