Where should the loudspeakers and the listener be placed in order to obtain excellent sound quality? Before answering this question, we would like to explain a few basic facts about human acoustic perception.
Like CD and DVD discs, Blu-ray discs have three variant formats: prewriting, erasable and writable. The abbreviation of pre-written Blu-ray CD is BD ROM, which usually contains movies or TV dramas republished in high definition format
We are surrounded by sounds and frequencies which extend beyond the realm of what we perceive as ‘sound’. However, there is a growing body of evidence to suggest that we ‘sense’ these high frequencies, just as we ‘feel’ sub-sonic sounds.