Graphene used for speaker prototype

[Per Søvik]

Re: New speaker tech.. *Graphene*

Sound is air moving back and forth...

For linear materials advancement it is an issue of mass to rigidity, for advanced new technology think of alternate ways to move air (like local heating, or ionized, or whatever).

JR

Sound is molecules bumping into each other, air that is moving is called wind ~;-)~:wink:

Bass speakers are using a lot of energy pushing air, and very little of that energy is translated into sound.
Is there conceivably a better way?

 

[John Roberts]

Re: New speaker tech.. *Graphene*

Sound is molecules bumping into each other, air that is moving is called wind ~;-)~:wink:

Not to be even more pedantic, DC sound is wind. Sound is wave motion that involves air moving "back and forth", (like I said).

Bass speakers are using a lot of energy pushing air, and very little of that energy is translated into sound.
Is there conceivably a better way?

Speakers waste a lot of energy moving a relatively heavy cone and VC back and forth, with imperfect coupling to the nearby air. Moving air at distance is the desired result. The obvious energy saving is to cut out the middle man, stick a small transducer in the outer ear, or bypass the mechanical system completely and wire electrical signals directly into the auditory nerves.
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This parade of ways that Graphene is changing the world, seems like a creative writing contest between some PR wonks.

JR