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
WAR MACHINE “BLUE BERETS”
Military paratroopers wearing the blue beret. If combat vehicles and airborne troops also "gave" blue berets, they first would have to own a BMD (airborne combat vehicle). The revision...
THE TOOL HOLDER OF SCREW
If you don't have the special kit for fixing the abrasive wheel in the Chuck of a drill — assemble it from the available parts. Only need a screw, two large washers and nut. The circle...