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Re: [Phys-L] new audio speakers

Probably an ultrasonic CARRIER wave modulated by a subsonic Signal wave -
mimicking AM E&M broadcasting
Bob Sciamanda
Physics, Edinboro Univ of PA (em)
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On Fri, Nov 13, 2020 at 1:39 PM Roger Key <> wrote:

Speculation: Ultrasonic sounds arranged to produce beats that make the
desired sounds, and those beats only happen at the location of the
listener's ears, while everywhere else the sound is almost eliminated by
destructive interference? I find it difficult to imagine, but maybe

Very cool technology, however they do it.

Roger Key
Instructional Support
[web <>][facebook


On Fri, Nov 13, 2020 at 10:17 AM Anthony Lapinski <>

Hope everyone is doing well, feeling well, and teaching well in this new

Speaking of new realities, I saw this yesterday on the news. Wireless
speakers and no earbuds needed! I was intrigued. How does this work? How
can this work? Subsonic waves decrease in frequency to the audible range
when conducting through bone/tissue? Interference phenomenon?



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