Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : July 18, 2024
Radiation mode-based loudspeaker array is applied to a head-rest audio system for realizing personal audio. The objective is to deliver sound to a nearby listener while reducing sound leakage to surroundings. Radiation modes are amplitude and polarity combinations of loudspeakers, which are orthogonal to active and reactive acoustic powers. The amplitude and polarity with the maximum reactive-to-active ratio is employed for confining sounds in the near field. A linear array with three loudspeakers is developed and located near an ear of HATS. The sound radiation characteristics in anechoic room are presented. Distance between the array center and listening point is defined 3cm. Sound leakage is measured at 30cm of radial distance from the array center. Speech frequency band from 300 and 3400 Hz is analyzed.
