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A different type of speaker/microphone
A different type of speaker/microphone
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Old 9th August 2018, 02:11 AM   #1
Pano is offline Pano  United States
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A different type of speaker/microphone
Default A different type of speaker/microphone

This Flexible Nanomembrane Loudspeaker Attaches to Skin and Plays a Violin Concerto

The membrane uses heat to create the vibration. The microphone uses the triboelectric effect.

More details here: Transparent and conductive nanomembranes with orthogonal silver nanowire arrays for skin-attachable loudspeakers and microphones | Science Advances
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Old 9th August 2018, 04:41 AM   #2
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"silver nanowire arrays"

Mmmmmm! Silver! Must sound fantastic!
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Old 10th August 2018, 05:37 AM   #3
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A different type of speaker/microphone
I knew that was coming.

Still, the technology is unusual. No magnets or capacitors.
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Old 10th August 2018, 06:26 AM   #4
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> No magnets or capacitors.

I don't see any "field" at all (Alnico, polarization). This suggests it must "double", octave-up, the output.

The wee sound in the video does not refute that guess to my ears.

I hope I am mis-reading something.
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Old 10th August 2018, 10:16 AM   #5
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A different type of speaker/microphone
No fields for the speaker.
"The speaker can emit thermoacoustic sound by the temperature-induced oscillation of the surrounding air."
Don't know about the doubling. It isn't mentioned and it's hard to tell from the graphs. Not much bass response, at least at that size. Might make an interesting tweeter.

The microphone uses the triboelectric effect, so could be said to have an electrostatic field.
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