brown notes

also called 'jericho notes' (a reference to the biblical story) are the frequencies that cause a destructive reaction in the physical build of whatever these frequencies are targeting. such as in the biblical story, they played these 'brown notes' on some sort of wind instruments. it cracked the foundation of the wall of jericho and it crumbled.
during the war, armies attempted to use these brown notes as warfare. they tested every different note and variation of chords on every single instrument ever created. they were trying to find a note that would disturb a man's body so much that he would lose control of his bodily functions (including his digestive system, which lead to the name 'brown note') they were unable to find it.
mythbusters attempted to find the brown notes a few months ago, but the noises they produced did nothing but make their test subjects extremely uncomfortable.
i want to find a brown note. or a metaphorical brown note.