Old alarm clocks and many doorbells and telephones emit a signal due to the blows of “hammer” metal hemisphere of the bell.
If you are annoying it’s pretty sharp rattling, stick a bell in place of hitting it square of adhesive tape or medical adhesive tape device will beep “whisper”.
.
Recommend to read
CLAMP “THREE WOOD”
When gluing different items instead of the clamp you can use a clamp consisting of two strips, wire and click. The arrangement of such clamps can be seen from Fig. S. FEDORENKO, g....
“FORWARD, TO MARS!..”
This slogan was the basis of the life and work of one of the founders of Russian space engineer Friedrich Arturovich Tsander, who developed the 20-ies of the last century one of the...
