| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a portable terminal device which is capable of performing comfortable acoustic reproduction with high sound quality and has high adaptability to an environment, where the device is used, and high convenience. <P>SOLUTION: In an acoustic reproduction system for a portable terminal device, the portable terminal device includes at least two acoustic loudspeakers 2a, 2b. The at least two acoustic loudspeakers are positioned in a length direction of the portable terminal device or at both ends of a diagonal. At least one of the at least two acoustic loudspeakers is capable of changing an angle with a casing wall of the portable terminal device along a direction of acoustic propagation to a listener or at least one of the at least two acoustic loudspeakers is capable of changing an angle outwardly relative to the other acoustic loudspeaker so as to prevent crosstalk. <P>COPYRIGHT: (C)2011,JPO&INPIT |
