A new 5-loudspeaker 3D sound system with a reverberation reconstruction method

For 3D sound systems, reverberations are often added into sound sources to increase spatial ambiance. However, a conventional method do not consider the direction of each reflect sound, and use diotic measured reverberations. They are insufficient because each reflect sound has different characteristics, and reverberation is composed of them. We propose a new 5-loudspeaker 3D sound system with a reverberation reconstruction method. We consider that room reverberations are a set of direct sounds in a free space with no reflection, therefore we analyze a room impulse response by the sound intensity method to obtain image sound sources. We calculate all head-related effects, sound energies and delays of all image sound sources. Finally, we appropriately pan all image sound sources into five loudspeakers. A combination of reconstruction of room reverberations using all image sound sources with head-related effects and 5-loudspeaker 3D sound system improves a direct sound direction perception and expanse feelings of sounds. Listening tests have conducted and the results show that our new system is better than a conventional system.