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
ATLAS PROFILES
Profile "CRD-2". Developed in 60-ies of the Western European model airplanes especially for rezinomotornaya models. This profile is also recommended for glider models of a class "A-1". ...
TRIPOD FOR PETS
Many of those who contain animals in the house or apartment, the familiar pattern when a dog or a cat, licking remains of food from the bowl, rides on the floor of the emptied vessel,...
