Nice parsing, but not an accurate description.
Here's the complete sentence which puts your cite into the proper perspective:
"Sound is a vibrational transmission of mechanical energy that propagates through matter as a wave (through fluids as a compression wave, and through solids as both compression and shear waves) that is audibly perceived by a listener. [u]"
Transmission of energy is not a form of energy.
A list of forms of energy
Potential energy
Gravitational potential energy
Elastic potential energy
Kinetic energy
Thermal energy
Electrical energy
Magnetic energy
Electromagnetic fields
Chemical energy
Nuclear energy
Surface energy
Don't see "sound" listed...
"Active energy" is a transient state. Not a constant state. If you turn on your oven, a energy source to heat your food must be applied. You can heat your oven as long as yo have an energy source. The oven cannot heat your food on its own without a power source. If you heat your home in the winter, and the power goes out, your house will not stay heated indefinitely. Your house will experience "heat loss" and become cold. Which is an interesting thing to consider.
If your definition of "active energy" was an accurate depiction of physical reality, then the stars in the universe would never burn out. Your physical body would live forever. Obviously stars do burn out and your body withers away. Even the universe will experience a "heat death" sometime in the future.
There will be two Ages. The first: The Age of Power. The next: The Age of Equality.