MOVING OBJECT POSITION DETECTION DEVICE AND MOVING OBJECT POSITION DETECTION METHOD

摘要

The invention is provided with: a sound wave input unit (10) that inputs a sound wave that contains moving-object-generated sound generated by steady-state noise and by the travel of a moving object existing in the surroundings; a steady-state assessment unit (22) that assesses whether the sound wave is steady-state; a covariance processing unit (23) that calculates a covariance matrix element based on the sound pressure of the sound wave, the time differential of the sound pressure, and the space differential of the sound pressure, said covariance matrix element being calculated as a first parameter for the sound wave when said sound wave is assessed as not steady-state by the steady-state assessment unit (22), or being calculated as a second parameter for the sound wave when said sound wave is assessed as steady-state by the steady state assessment unit (22); a moving object parameter computation unit (24) that subtracts the second parameter from the first parameter, thereby calculating as a third parameter, the covariance matrix element based on the sound pressure of the moving-object-generated sound, the time differential of the sound pressure, and the space differential of the sound pressure; and a direction detection unit (25) that detects the direction of the moving body from the third parameter.