| 摘要 |
<p>PURPOSE:To widen the frequency zone of informing sounds by informing as alarm or time signal using plurality of diaphragms differing in the frequency. CONSTITUTION:The input signal (e) amplified to the relatively high voltage is made basing on a timing signal from a watch circuit to be conducted to a filter circuit 3. The filter circuit 3 is a combination of the resistance R, capacitor C and the inductance L as a split circuit net and the signals split into a frequency component respectively are impressed to the speakers 1 and 2 reproducing each frequency zone to be reproduced. The constitution, wherein the speakers 1 and 2 are built-in a part 22 of a watch band 21 and the informing sound is made to sound from a sounding window 23 with due consideration of design, can realize the thinly-making of a watch.</p> |
