| 摘要 |
<p>In a bass reflex type speaker (10), a Helmholtz resonator is formed by a bass reflex port (20) and a space (21) within a speaker enclosure (17) excluding the bass reflex port (20) and a speaker unit (18). The bass reflex port (20) of the bass reflex type speaker (10) is movable toward and away from a side surface (13) while maintaining its projecting direction within the speaker enclosure (17). In response to such movement of the bass reflex port (20), relative positional relationship between a neck and cavity of the bass reflex type speaker (10) varies.</p> |
