Make noises without being identified by the Taskmaster

Task brief

The actual text of the task brief is not known. The text below is paraphrased based on information disclosed in the episode:

One-by-one, stand on the mark and make a noise in a given category.

If Atle guesses correctly who made the noise, you are eliminated, and must sit on the bench.

If he guesses incorrectly, you are through to the next round.

And so we continue until we have just one contestant left, the winner.