A fairly recent Swiss TV report about the results of the didgeridoo / snoring research that won an Ig Nobel Prize:
The 2017 Ig Nobel Peach Prize was awarded to Milo Puhan, Alex Suarez, Christian Lo Cascio, Alfred Zahn, Markus Heitz, and Otto Braendli, for demonstrating that regular playing of a didgeridoo is an effective treatment for obstructive sleep apnoea and snoring.
They documented their research, in the study “Didgeridoo Playing as Alternative Treatment for Obstructive Sleep Apnoea Syndrome: Randomised Controlled Trial,” Milo A. Puhan, Alex Suarez, Christian Lo Cascio, Alfred Zahn, Markus Heitz and Otto Braendli, BMJ, vol. 332 December 2006.