For serious paranormal researchers, reliable audio documentation is absolutely vital. A basic setup might include a portable voice recorder, but explore upgrading to a advanced unit with features like internal noise https://www.amazon.com/shop/livelife079/list/O51B9L22NYEM?tag=onamzliveli08-20&ref_=aip_sf_list_spv_ons_mixed_d&ccs_id=33e5d028-1b34-4112-9a1e-c06e129bb194