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
ASSAULT GUN “FERDINAND”
His appearance in the world's most famous German self-propelled gun of the Second world war, Ferdinand was obliged, on the one hand, the intrigues around the heavy tank /K 4501 (P), and...
Glider model class A1
At competitions of the Moscow schoolchildren model pupil of the 55th school Igor Svistunov in adverse weather conditions (wind of 6-10 m / s) scored 501 points. Only breaking model at...
