| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem wherein sound quality is changed/adjusted by adjusting generally an output side electric signal when adjusting the quality of sounds generated from an electroacoustic transducer (speaker unit) in the prior art, but it is difficult to naturally and precisely adjust the sound quality using the electric signal, and original characteristics of a speaker unit or a case are not effectively utilized. SOLUTION: The present invention is characterized in that sound quality is changed not by using the electric signal, but by controlling air vibration generated from a diaphragm of the speaker unit. A sound path pipe that becomes a passage of sounds, therefore, is coupled in a part of the speaker unit case and a removable adjustment pipe produced on different conditions is built therein. The sound quality can also be controlled by exchanging screws (adjustment screws) opened in various hole sizes for varying the opening area of the sound path pipe. With such a method, a listener himself/herself can create sounds preferable for the listener by performing the exchange work by himself/herself, and natural and precise sound quality adjustment that can not be achieved by changing the sound quality using the electric signal, is made. COPYRIGHT: (C)2008,JPO&INPIT
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