Topic: Graphine speaker membranes?

[lsd2525]

More snake oil?

https://www.nextbigfuture.com/2017/06/graphene-loudspeaker-membranes-coming-march-2018-and-devices-to-follow.html

[morst]

Perhaps not snake oil.

In 1990 I spoke with Dan Healy before the Grateful Dead show at Sandstone, and he was lamenting that there had not been a real advance in speaker technology in many years.

Graphene drivers (and for that matter graphene dynamic mic diaphragms) would not be a bad idea, though it might not be revolutionary.

Remember how the use of "Rare Earth" magnets allowed Sony to increase output and decrease size and weight of their headphones in the early '80's and the Walkman became a thing!?

I see that one point touted for the Graphene products is that the lighter materials will improve battery life (energy efficiency)  - That's hip.

[Ben Turnbull]

In my limited grasp of all things tech, I came away thinking that they might be talking of small devices that you'd find in hearing aids, head phones, cell phones e tc... where the speaker was small to microscopic. Not something you'd find in an 8 to 10" driver of your home stereo.  I'm likely wrong.

[morst]

In my limited grasp of all things tech, I came away thinking that they might be talking of small devices that you'd find in hearing aids, head phones, cell phones e tc... where the speaker was small to microscopic. Not something you'd find in an 8 to 10" driver of your home stereo.  I'm likely wrong.

Their target market for what I saw does seem to be small devices.

But if you had an efficient enough process, you could make a larger transducer out of a large number of these, (any perfect square would work) 64 of them? 525 of them? 65536 of them?

[lsd2525]

I want some Jensen 6x9's for my Sanyo bi-amp 8-track in my '76 Nova

[capnhook]

I want some Jensen 6x9's for my Sanyo bi-amp 8-track in my '76 Nova

I almost thought you might be the guy that stole my car.....but my Sanyo 8-track wasn't bi-amped.....

[lsd2525]

I want some Jensen 6x9's for my Sanyo bi-amp 8-track in my '76 Nova

I almost thought you might be the guy that stole my car.....but my Sanyo 8-track wasn't bi-amped.....

I used to keep a box full of matchbooks in the car to jam under the 8-tracks when they started dragging. Hi-Fi baby!!

[Hypnocracy]

ya'll some ole farts...and yes I had a 8 Track in my first vehicle...a Raleigh Parks and Rec. Forest Green 1967 Ford Bronco my father bought at the junkyard and we repainted & repaired in our basement.

[lsd2525]

ya'll some ole farts...and yes I had a 8 Track in my first vehicle...a Raleigh Parks and Rec. Forest Green 1967 Ford Bronco my father bought at the junkyard and we repainted & repaired in our basement.

Molly Hatchet's "Flirtin' with Disaster" just sounds better on 8-Track

[Gutbucket]

In my limited grasp of all things tech, I came away thinking that they might be talking of small devices that you'd find in hearing aids, head phones, cell phones e tc... where the speaker was small to microscopic. Not something you'd find in an 8 to 10" driver of your home stereo.  I'm likely wrong.

Their target market for what I saw does seem to be small devices.

But if you had an efficient enough process, you could make a larger transducer out of a large number of these, (any perfect square would work) 64 of them? 525 of them? 65536 of them?

True digital speaker? with lots of pixel-like on/off driving elements?
https://en.wikipedia.org/wiki/Digital_speaker

Sort of actual example via MEMS- http://www.icsense.com/cases/128-channel-mems-driver-with-1-8v-to-90v-dc-dc/

^ Except looks to have 87 one volt steps per element rather than two if I read this correctly..
HV switch matrix, 64 columns and 32 rows
Individually programmable outputs with 1V steps
On-chip DC-DC converters (2.9V to 90V)