Ultrasound Networking (2014)
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Ultrasound Networking (2014)
1–10 of 17 posts
Re: Ultrasound Networking (2014)
#2I'm going to guess this guy doesn't have any dogs :-D
Re: Ultrasound Networking (2014)
#3Is this protocol significantly different from what 56K modems do over an analog phone line? How would the bandwidth compare to taking the 56K modem protocol and upping the frequency to whatever band is used here?
Re: Ultrasound Networking (2014)
#4Networking that doesn't use ethernet cables or Wi-Fi is always fascinating. I'm reminded of the way some labs in the pre-wifi days used infrared beacons and transceivers on laptops to create local wireless networks.
Re: Ultrasound Networking (2014)
#5Great demo using GNURadio, which I personally find daunting.
Re: Ultrasound Networking (2014)
#6It would be fun to try this with a 96kHz audio card (audiophiles, this is your moment!) and trying this with a large band like 20kHz-40kHz (you would need an ultrasound transducer and amplifier, of course)
You could probably get, I dunno 200kbps?
Re: Ultrasound Networking (2014)
#7Networking that doesn't use ethernet cables or Wi-Fi is always fascinating. I'm reminded of the way some labs in the pre-wifi days used infrared beacons and transceivers on laptops to create local wireless networks.
Oh gosh, I remember in college, playing with PCMCIA cards in laptops, and you'd have to kinda point them at each other. Can anyone confirm if that could be correct, or that I'm actually misremembering something?
Re: Ultrasound Networking (2014)
#8Whatever happened to that company trying to transmit power via ultrasound?
Re: Ultrasound Networking (2014)
#9Networking that doesn't use ethernet cables or Wi-Fi is always fascinating. I'm reminded of the way some labs in the pre-wifi days used infrared beacons and transceivers on laptops to create local wireless networks.
Oh gosh, I remember in college, playing with PCMCIA cards in laptops, and you'd have to kinda point them at each other. Can anyone confirm if that could be correct, or that I'm actually misremembering something?
Can't confirm because what we had instead was a task to implement a custom protocol over an RS-485 linear bus.
The device in question was only available on appointment, so we only had a few shots at this.
Eventually we went with adding a checksum and resending the whole "packet" (one byte) when it didn't match, because we couldn't get the damn thing to send stuff correctly 100% of the time.
Re: Ultrasound Networking (2014)
#10Whatever happened to that company trying to transmit power via ultrasound?
Dave Jones from EEVBlog made a debunking video on uBeam. They apparently tried to to do ultrasonic wireless charging, which seems to fit your description. Here's the video, it's mostly about efficiency/coupling loss (beam forming has it's limits) and IIRC also about being potentially harmful for humans: https://www.youtube.com/watch?v=A8dqzVlhFkA