Silent Subliminal

[4Kingdoms]

:angel:
Hi there I am Holly a Psychology PhD student researcher conducting an experiment that requires a group of people who have a negative mind set to be exposed to happy positive laughing music while the other group are exposed to nil, however neither group will be aware as I need to deliver the positive laughing music at a sound level that reaches the unconscious but not the conscious brain - the silent subliminal sounded perfect as I need to deliver it to a whole group of people therefore headphones are not an option: BUT I read Shannons post somewhere discussing the potential problems of such subliminals even causing tinnitus so this is not going to be suitable, can anyone help me?
Perhaps even tell me at what sound level the music is audible but not consciously?

Thanks

Holly

I'm confused by your question. Are you using your own (self made subliminals) or are you using subliminals made by Shannon?