Splashing or trickling Seems: These sounds is usually heard when water accumulates and moves in an enclosed Area, including in just a wall cavity or underneath a ground. In the situation of thermal sensitivity, the reduce the better, so a digital camera with 30mK sensitivity is great for humidity applications, https://trenton1oxfm.humor-blog.com/31116718/the-smart-trick-of-how-to-detect-water-leaks-that-no-one-is-discussing