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The last news is rather loosely related to retro technology, and you may have read it this week already.

The American Physical Society this week introduced the concept of a transistor for sound. 🔊 In addition to electricity and light, it can in principle be used to build logic gates that are acoustically driven. But what's really exciting about the IEEE article is the fact, that the concept could allow barriers in current transistor manufacturing to be broken in the near future. Quote:

However, creating electronic topological transistors in which the dissipationless flow of electrons can get switched on and off in topological materials requires dealing with complicated quantum mechanics. By using acoustic topological insulators, in which sound waves can experience topological protection, scientists were able to sidestep this complexity to create acoustic topological transistors.

Charles Q. Choi has collected the most important facts in the article. It will be interesting to see where this journey will lead us.