| 摘要 |
PROBLEM TO BE SOLVED: To provide a calculation designing guide in order to satisfy the need for recording the instrument sounds in addition to voices because the voice storage medium to the today's CD is based on electrical recording. SOLUTION: In the high-fidelity playing of a sound groove disk, a reproducing stylus as thin as possible is manufactured so as to emit a considerably sufficient tone while the partial sound part of a stored waveform is traced by the tip of the reproducing stylus in a relation between the tip thickness (represented by a curvature radius) of the reproducing stylus and a sound groove, a sound groove width is set so as to enable the tip of the stylus to slide therein satisfactorily well, and a band width is set to house the waviness of the sound groove. For example, up to 2000Hz is set by using the instrument of the area of sound as low as possible or preventing the use of a high-sound area, then the rotation speed, the storage time and the disk size are set, and outermost and innermost spiral ring diameters in this case are set to match each other in a most desired manner. Thus, a good-quality sound is stored and reproduced. COPYRIGHT: (C)2005,JPO&NCIPI
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