When Alexandra Dean’s researchers tracked down the 1990 Forbes interview recordings in 2017, they discovered a woman who had not stopped thinking. She was seventy-five in 1990, living in Florida, rarely interviewed. The voice on the recordings was, by all accounts, sharp — she spoke about the patent, about her career, about her view of how she had been treated. She had not made peace with the oversight, because peace was not the right relationship to have with a fifty-year-old injustice.
## What Frequency Hopping Looks Like Now
The abstract idea of frequency hopping — changing the carrier frequency of a transmission in a coordinated pattern known to transmitter and receiver but not to adversaries — is now embedded so deeply in consumer electronics that most people use it dozens of times a day without knowing it.
A Bluetooth headset negotiating a connection to a smartphone is performing adaptive frequency hopping in the 2.4 GHz band, cycling through up to seventy-nine one-megahertz channels in a pseudorandom sequence determined by a shared clock and hopping algorithm. When the headset’s receiver detects interference on a channel, the adaptive system avoids that channel in future hops. This is a sophisticated digital evolution of the same underlying concept: use unpredictability to defeat interference.
The difference between what Lamarr and Antheil proposed and what modern Bluetooth does is the difference between a mechanical clockwork and a microprocessor. Both achieve synchronization between transmitter and receiver using a shared sequence that is not revealed to the outside. Both make interception or jamming difficult by distributing the signal across many frequencies over time. The specific mechanisms are entirely different in material, scale, power, and speed.