Nanotubes go thermoacoustic
moderator note: this is the merge of 3 threads on this subject
Could be cool, but could also be THE most annoying thing ever...
http://technology.newscientist.com/article/dn15098-hot-nanotube-sheets-produce-music-on-demand.html
moderator note: this is the merge of 3 threads on this subject
Could be cool, but could also be THE most annoying thing ever...
http://technology.newscientist.com/article/dn15098-hot-nanotube-sheets-produce-music-on-demand.html
Nanotube loudspeakers
And now for something completely different, from Physics Today:
http://blogs.physicstoday.org/update/2008/11/nanotube_loudspeakers_1.html?type=PTFAVE
And now for something completely different, from Physics Today:
http://blogs.physicstoday.org/update/2008/11/nanotube_loudspeakers_1.html?type=PTFAVE
This could change everything, possibly no more mechanical resonance systems...but thermoacoustic systems 😀
projector screen with layer of this material would be nice 🙂
or even better, ipod touch with sound output matching small boombox. or entire rooms' walls ceilings and floor covered with this material for extremely customizable sound.
or even better, ipod touch with sound output matching small boombox. or entire rooms' walls ceilings and floor covered with this material for extremely customizable sound.
Hi,
Do not hold your breath ......
Output frequency = double input frequency = half wave rectifier.
Levels are measured with watts of input @ 5cm distance.
1K ohm per square ? note drive voltages are not given.
Thermoacoustic speakers ? yeah right .... they will not blow up .....
Its all drivel folks, and not happening any time soon.
🙂/sreten.
Do not hold your breath ......
Output frequency = double input frequency = half wave rectifier.
Levels are measured with watts of input @ 5cm distance.
1K ohm per square ? note drive voltages are not given.
Thermoacoustic speakers ? yeah right .... they will not blow up .....
Its all drivel folks, and not happening any time soon.
🙂/sreten.
Fascinating!
It might not be practical, but calling it drivel is extreme.
Perhaps signal processing to halve freq rather than power consuming DC bias.
It would seem to be doomed to inefficiency if it's generating pressure from heat.
What we need is electrostrictive nanotube film to convert electrical energy directly to motion, like PZT's.
It might not be practical, but calling it drivel is extreme.
Perhaps signal processing to halve freq rather than power consuming DC bias.
It would seem to be doomed to inefficiency if it's generating pressure from heat.
What we need is electrostrictive nanotube film to convert electrical energy directly to motion, like PZT's.
noah katz said:
Hi,
YMMV, it is not a "magic" frequency doubler,
it is rectification = shed loads of distortion.
A transducer ? yes, A loudspeaker ? drivel .....
🙂/sreten.
Efficiency will kill this idea. There is no end of potential sound makers if efficiency is not an issue. But these things will take a lot of power at high voltage to achieve any reasonable levels of output - especially at LF, and lets face it LFs dominate the situation for almost any type of source. DC current modulation solves the linearity problem, but dramatically raises the power requirements.
Somebody will make devices from this and call them revolutionary sound quality. It is inevitable.
Somebody will make devices from this and call them revolutionary sound quality. It is inevitable.
Has anybody built an ESL from bucky paper?
Here the nanotubes could enhance sensitivity.
But $$$$$
Here the nanotubes could enhance sensitivity.
But $$$$$
Can you explain why you'd expect an increase in sensitivity? I don't think I'm following you.
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