uhh, my predecessors question about "why is it getting louder in some places" reminds me of one weird happening i had when in a special "mood".
i typed my fingers wound right here in a forum, but the whole post was deleted because of mentioning some "stuff".
well, i make it short this time:
i had such an experience before, but it was in netherlands and i walked up to an odd looking house with garden gnomes in all shapes and sizes (about
50!!) of them in the foregarden.
i had a high pitched noise as you are talking of, and when i approached the white fence, where behind those gnomes were and behind them a trailer with
no curtains on the windows, which look veery scary to me.. the sound got louder an louder with every cm i went closer.
i felt that there was some entity that was BAD as something, i knew it was watching me, it was in the house.. but there was no loght or anything...
i thought to myself "what you are for a wimp, get closer, jump over your shadow!!"
so i did, just to find out that this noise went up so loud, that i jumped back and yelled "AUH!".
it was that loud as poking a q-tip at the drumhead of the ear.
i very fast left this creepy place and let this dark thing stay where it chose to be... it felt like a spider in a web.. woo!!
alli wanteed to say is, that locations may effect us very much indeed.
some "seers" used to go to special places on hills and so. the places marked by old druids are believed to have such amplifying forces, or more
exaxtly the place beyond them. maybe those stones also act as a crystal who is vibrating in the same frequency.. mostly those places are the same,
where cornfields are used to draw some pics...
anyway, those leylines are all around us, and i am going to look my place here for some good ones.
there are some nice stones not far from here.. but o dont know if they are good or more evilish in nature...
i bet this place would undoubtfully strengthen such abilities..