A memory recall aid and brain-storming tool comprises at least one database containing information regarding a plurality of topics, sub-topics, and filters, as well as words, concepts or phrases associated with the topics, sub-topics and filters. The first acoustic transducer receives a first electrical signal and in response radiates acoustic energy, and the second acoustic transducer receives radiated acoustic energy and in response generates a second electrical signal. The nanofibers within the same roped fiber bundle are entangled together. Here, a portion of the coil wire that transfers between the first ring layers and second ring layers does not cross over, but only runs upon any adjacent portions of the coil wire.