So, do you really think it’s Placebo as I and Steve Martin might?
See a couple of minutes in. This sketch may be where wooden headphones got their start.
I’m not sure I buy the antenna idea. While it sounds possible, I’ve had enough trouble getting antennas that were designed as antennas to perform satisfactorily. And they had to be attached to a particular location. Why would 1.5 meters of RF rejection be good? I know that there is math buried in this question. Wavelengths, and Frequencies, and Decibels, (oh my).