What other ways of making a loud noise can you think of besides whistles to help searchers find you if lost?

A couple of comments on the 4th page of the whistles in the woods thread suggested this question to me.
One of the comments pointed out how well lower frequencies can travel in some cases.
Another comment mentioned drums.

What other things besides blowing a whistle or shouting could a lost person do that would make a lot of noise and hopefully get them found if searchers were within range of it?

So lets just throw some ideas around and see if we can come up with anything.