Is it possible and worth the effort to harness sound to generate energy.
How would you do it

What the human ear perceives as clanging cacophony—the roar of a train engine or the whine of a pneumatic drill—only translates to about a hundredth of a watt per square meter. In contrast, the amount of sunlight hitting a given spot on the earth is about 680 watts per meter squared. “That’s many orders of magnitude more,” explains Cohen-Tanugi. “That’s why it’s more efficient to collect and store sunlight using solar panels than to harvest energy from sound. And the energy density in oil and gas is orders and orders of magnitude higher, making generating power from those sources even more cost effective.”

http://engineering.mit.edu/ask/can-sound-be-converted-useful-energy

There must be a lot of energy in sound, turbo car, not so noisy, more power.

AwesomeO said:

There must be a lot of energy in sound, turbo car, not so noisy, more power.

They compress the air going into a motor, not that which comes out.

roughbarked said:

AwesomeO said:

There must be a lot of energy in sound, turbo car, not so noisy, more power.

They compress the air going into a motor, not that which comes out.

I know, it was a bit of a tongue in cheek comment referring to the fluid coupling, but non the less, the energy lost in sound now drives a turbine. More efficient, less waste.

Cymek said:

Is it possible and worth the effort to harness sound to generate energy.
How would you do it

There is remarkably little energy in sound. How would have to be an array of large microphones, optimised to turn the maximum amount of input sound energy into AC electrical energy.

https://archive.org/details/SF121