Sound spot generation and evaluation by a large scale panel loudspeaker array

This paper describes the Sound spot generation and evaluation by a large scale panel loudspeaker array. The authors research the sound spot by loudspeaker array. The sound spot is local high sound pressure area. We develop 128 ch panel loudspeaker array and 512 ch panel loudspeaker array to generate the sound spot. The 512 ch panel loudspeaker array is using four the 128ch panel loudspeaker array systems, and is surrounded by the square form. The authors simulate the sound spot generated by the 128 ch panel loudspeaker array and the 512 ch panel loudspeaker array. From the result of the simulation, the 128 ch panel loudspeaker array can generate straight line sound spot and the 512 ch panel loudspeaker array can generate spherical sound spot. Actual measurement of sound spot is performed by using 64 ch microphones measurement system. We confirm that each panel loudspeaker array generate three dimensional sound spot from result of measurement. This means that communication of voice information to many people is possible.