waves - Could sound be considered a kind of renewable energy?

Is sound energy useful as a source for generating electricity? If so, could it be a renewable resource?

Answer

I think you might be a little confused.

The phrases 'renewable energy' and 'un-renewable energy' are used to refer to industrial sources of energy. These industrial sources include Wind, Solar, Wave, and Nuclear power, and traditional fossil fuels (coal, oil, natural gas etc.).

If a source of power is renewable, it is not depleted (used up) when utilised - for example, the wind doesn't run out just because you put a few turbines up.

These industrial sources are not forms of energy themselves - they produce energy (heat energy like in a nuclear reactor or kinetic energy like in wave and wind power), but "solar power" or "wind power" are not a forms of energy. They are sources. This link gives a good overview of the different forms of energy.

Sound energy is associated with the vibrations of matter (sound waves vibrate air particles - that's how you can hear), so is a form of kinetic energy (the energy all things have when they move). It is not an energy source, so it doesn't make sense to call it "non-renewable" or "renewable".