Joseph Lorenzo Hall, PhD on Nostr: Want exact network time on a wall clock? Apps like Clock Wave (iOS) grab the network ...
Want exact network time on a wall clock? Apps like Clock Wave (iOS) grab the network time from the Internet and play a 60kHz audio tone. The phone's speaker coil creates a pulsing magnetic field that mimics the official (WWVB) radio signal, forcing the clock to sync.
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