i want to know how a sonometer really works in detail and also what is "a fundamental tone" and " a overtone"
It is an instrument that is used for studying the vibrations of a fixed wire or string. It consists of a hollow wooden box with a wire stretched across its top. The wire is fixed at one end while the other end passes over a pulley and a load can be suspended from it. Any length of wire can be set into vibration by placing two inverted v-shaped bridges at the ends, by placing vibrating tuning fork on the sonometer .