In the 90s, and up until cell phone cameras were a big thing, I remember some family members having cameras with rather large flash modules on top and it would make a weird noise once the flash goes off after taking a picture. Some smaller flash capable cameras would make the sound also.
In: Technology
>When you turn on a thyristor flash you will hear a high-pitched, electrical, squeal:
[https://www.youtube.com/watch?v=uhABdO97Ih0](https://www.youtube.com/watch?v=uhABdO97Ih0)
>That squeal is the sound of the capacitor charging. It might be of interest to note that when people born between the years of approximately 1972 and 1980 hear that sound, they will succumb to the crushing weight of childhood nostalgia and blather on about memories of Cabbage Patch kids, Atari Combat, Captain Lou Albano (possibly Cindy Lauper), and birthday parties where their father or mother took pictures of them. It is almost impossible for members of Generation X not to wax poetic and effuse about some such nonsense if they hear that sound coming from a flash. Try it. Fun times.
[Source](https://emulsive.org/articles/guides/everything-you-wanted-to-know-about-auto-thyristor-flash-photography-but-were-afraid-to-ask)
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