To what other widely influential invention is the electret condenser microphone compared in terms of its foundational role in modern technology?

Answer

The transistor

The electret condenser microphone is often likened to the transistor because both serve as foundational, underlying technologies that disappear into the products themselves. Much like the transistor, the microphone's miniaturized design enabled the creation of countless modern electronic devices, becoming a persistent and necessary utility that enables essential functionality in daily life.

To what other widely influential invention is the electret condenser microphone compared in terms of its foundational role in modern technology?
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