Experiment of December 1, 2016:

The time to submit an answer is over. You can now view the solution of the experiment.

Solution video:

For technical reasons you need to click twice to first load the video and then start playing it.

Experiment:

The following file is needed for the experiment: PiA2016_Experiment_01.wav

Question:

Listen to the song as Ms. Santa does it. What does she discover?

A) You hear a tune where the pitch gets higher and higher.

B) The tune ends on the same note with which it begins. It seems to get higher and higher, but this is an illusion.

C) The tune seems to get quieter and quieter. But this is an illusion.

D) The tune seems to get louder and louder. But this is an illusion.