| 摘要 |
PROBLEM TO BE SOLVED: To reduce an influence of a peak dip generated by sound directly radiated in the air from a speaker unit and reflected sound by a wall surface. SOLUTION: Peak dip is generated by interference of each radiation sound of a woofer 1 and a tweeter 2 and reflected sound reflected after each of these radiation sounds once hits a wall surface. This peak dip is more often generated in a high frequency and becomes acoustically inconspicuous as a phase difference between the radiation sound and the reflected sound is smaller. Then, by getting the woofer 1 and the tweeter 2 closer to a wall surface 100 respectively, the phase difference between the radiation sound and the reflected sound is made smaller and an influence of the peak dip is reduced.
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