Students in Year 9 Science classes have been studying sound.

Some had the psycho-acoustic filter in their brain derailed temporarily by negating their ability to use temporal cues and driving them to not be able to trust their spectral cues by dampening down the pinna (which is the floppy part of the ear on the outside of your head) using Play-doh.

When the outside shape of their ear was changed, students were not able to identify where a sound was coming from - this was rather surprising and quite entertaining.