| 摘要 |
PURPOSE: To provide an image normal position controller capable of performing comfortable listening by controlling the normal position of an image in a three- dimensional direction. CONSTITUTION: The normal position of the image in the three-dimensional direction can be controlled by radiating an impulse to a loudspeaker and a sound field, for example, via the loudspeaker in accordance with a horizontal direction desired to normally position the image from an impulse generator 14, applying band area division to the impulse collected by a dummy microphone 7 by a Fourier transformer 17, calculating the sound pressure level of each band area by a sound pressure level measuring instrument 9, calculating difference with an upper and lover directional image control data base 10 generated by an experiment in advance by a differential calculator 11, outputting a result to a frequency equalizer 13, and radiating it from the loudspeaker to the sound field 1 by correcting an acoustic signal by the frequency equalize 13. |
