The new $597 WavWatch 2.0 is on my wrist. If I put it up to my ear, I can hear the high frequency sounds it's emitting. The low hums can be heard a foot away.
Some free speed tests, including Ookla and Cloudflare, also give you download and upload scores for latency. These are referred to as “loaded latency” results, and they’re taken while the speed test ...