If electricity was to be conducted through a stone such as granite would the process make any sounds?

Answer 1

If we "trickle" some charge through granite, you wouldn't hear it, and we can do that with a high enough voltage. Granite, in addition to a lot of other stone, is generally thought of as an insulating medium. Note that granite is a silicate rock, and silicates are not terribly dissimilar to glass. And we know that glass is insulative. If you have a chunk of dry granite, it won't support current flow. But if you ramp up an applied voltage while limiting current to some tiny amount, granite can be made to conduct a tiny bit. But let's look at one other instance. If we apply a large enough voltage to dry granite and do not limit current in any way, at some point the voltage will be so great that it will tear the granite apart. When we apply a voltage to a material that doesn't want to conduct, it creates a voltage stress on the material. Increasing the voltage increases the stress, and there still won't be much happening. Note that the voltage stress will be felt "through" or "across" the granite between where the electrodes are placed. And this voltage stress will appear across granite or anything else that doesn't want to conduct and to which we apply a voltage. If we continue to ramp up the voltage, at some point the voltage will be so great that it will tear electrons out of their orbitals and force them up into the conduction band. This will force the granite to conduct, and an electric arc will punch through the granite. The structure of the stone will be destroyed, and you will hear that. The arc, a stream of electrons moving along an ionized trail, will announce itself because the rock will be superheated along the path the electrons take. A shock wave will form around the arc, and this is mechanical energy which will propagate as sound. Just like with lightning.