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Thermoacoustic earbuds using carbon nanotubes

post #1 of 2
Thread Starter 

apparently, researchers from tsinghua university and foxconn in china have created the first ever earbuds powered by the thermoacoustic effect, i.e. speakers without moving parts:

 

http://cen.acs.org/articles/91/web/2013/09/Rocking-Carbon-Nanotubes.html

 

the spl chart also looks interesting, but at a sensitivity of ~48dB/mW those guys would suck your portable player's/amp's battery dry in no time :D

post #2 of 2

Woeful SPL.

Let's hope the R&D people burn the midnight oil to develop a moer linear graph.

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