"David W. Jones" <gnome@hawaii.rr.com> writes:https://www.sciencedaily.com/releases/2022/06/220622101415.htm If sound can be seen optically, can it be generated optically? Say, to go with a hologram?I was of the opinion that laser-based interferometry microphoning off window panes had already been standard fare of secret services for decades. I don't think you really want to use the kind of lasers that successfully push surfaces around. Plasma speakers <https://en.wikipedia.org/wiki/Plasma_speaker> are enough of a high-energy ickiness.
Yah, I thought that a laser able to generate sound would be a bit too strong to use around people.
Plasma speakers. Fascinating. Is there a connection between the volume of the plasma and the frequency range it can produce? Such as, needing a bigger box of plasma to produce bass frequencies?
I think my favorite sound-producer
is still a pipe organ in a cathedral. :)
-- David W. Jones gnome@hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com "My password is the last 8 digits of π."