| 摘要 |
<p>A passage of a previously recorded audio signal is erased from a magnetic tape such that a substantially linear decrease or increase of the sound level is perceived by the operator when the signal is reproduced by a reproducing head. The erase current is increased as a function of time from a minimum to a maximum amplitude, sequentially, through three ranges, and decreased in reverse order. The slopes of current versus time within the first and third ranges have a value substantially greater than the slope within the second range.</p> |
