Have to laugh at the review below from bluray.com after reading and seeing your graph:
"Making up somewhat for the film's minimally lackluster visual allure is an astoundingly effective lossless DTS-HD Master Audio 7.1 track that is awash in floorboard rattling LFE and near ubiquitous surround activity. From the very first sequence, when the huge thump of giants stomping through the forest outside of Half-Blood Camp sends reverberant shockwaves through the air, it's apparent this mix is going to be very aggressive. The film has a number of nice set pieces that allow full use of the surrounds, including the kids riding the Hippocampus and, later, using a canister containing the "four winds" to propel their life raft onward during their quest. The showdown with Chronos also provides another onslaught of well positioned foley effects zooming and zinging through the soundfield. Despite this sometimes noisy approach, dialogue is never sacrificed, and always is well prioritized and easy to hear. Andrew Lockington's score isn't especially memorable, but sounds fine in this lossless format."