i'm 15 yrs old dating a 12 yr old grrl. i'm allowed to decide the evenings activity, we are going to listen to a radio mystery from the 1940's as an experiment in psychology (i'm Mach more than Jung). i set more than several candles of various highs and lows on a table between mother/father and myself/daughter. i light the candles turn off all other light sources and say to here mother can you see us, she reply's no, i inform her it works both ways, lets listen. upon the conclusion she( the mother ask's) did i like the story, my response i was preoccupied and much of it i did not hear but don't be concerned i would never do anything wrong, you and him are a marriage were there moments when you did not hear anything ? she confesses yes. i read all the comments as more than a courtesy. don't get too caught up in theoretical as it does not require any productivity and none is produced. i have recently been conducting experiments with deer that are able to hear me through their feet. acoustics is vibration and there exist other sensory organs besides ears that are able to detect it. the study is flawed like so many others (some of you have posted comments that will see this 'mirrored' in your comment) can an owl hear it ? can tech hear it ? the study is not worthless based on productivity but based on did we learn from it.