| 摘要 |
<p>PURPOSE:To execute a high fidelity reproduction at all times by a simple operation, by automatically changing over two speaker systems, both of which are able to execute a high fidelity reproduction at high and low acoustic pressure levels, by being interlocked with a variation of an acoustic pressure level. CONSTITUTION:When a sound volume 10 is operated to the upper side in the figure and a sound volume level becomes large, a switch 12 is change over to a speaker system 13 side. On the contrary, when the volume 10 is reduced and a sound volume level becomes small, the switch 12 is changed over to a speaker system 14, side. In this way, at the time of a high acoustic pressure level, the speaker system 13 which has been designed so as to be adapted for a high fidelity reproduction at a high acoustic pressure level executes a high fidelity reproduction, and at the time of a low acoustic pressure level, the speaker system 14 which has been designed so as to be adapted for a high fidelity reproduction at a low acoustic pressure level executes a high fidelity reproduction. In this regard, these are automatically executed by being interlocked with operation of the volume 10.</p> |
