alt Hacker NewsIt doesn't strike me as that useful to have a hidden microphone in a KVM product as most of the time, they're going to be stuck in server rooms with just lots of fan noise to record.
Far more of an issue would be any kind of keylogger built into the software, which is why it's best to go for devices that support open source software.
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The KVM just uses a devboard that's also sold separately and just happens to have a microphone, given how cheap the mics are having one extra SKU would probably just cost them more than savings.
Also I wouldn't really consider it "server room" product. Pretty much any new server has KVM, this is more "a hobbyist needing KVM for their home server"
Ultrawideband never caught on because it turns out that the speed of light and sound in air is frequency dependent, so you have to know the distance to the target pretty accurately and then skew the signal to send or receive. (Imagine a phased array antenna but also with a frequency domain to work out as well).
But that doesn’t mean you can’t make it function in a loud server room. The whole point of it is working in and around noise.
just fan noise?
https://arxiv.org/abs/1606.05915
Any signal that you can modulate can be an exfiltration channel, and fan noise is no different.