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
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
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.
"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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