What caused broadcasts to have that “vintage” sound in the mid 20th century

Question

Not talking about the static, mainly the voices of people.

Examples:

https://youtu.be/yYAw79386WI?si=SKCkEeHFLn83ixCB (skip to 4:30)

And a final example of a modern recreation

In: Technology

Answer 1

Easier answer: The microphone and the way it was recorded. The mic that originally recorded the broadcast is what gives it that tinny sound. Microphones can have different frequencies and dynamics, some are super sensitive and some are crap. A five dollar microphone sounds much different than a $5000 microphone. A 1927 microphone sounds much different than a 2024 microphone. It also depends on how the sound was captured: was it on vinyl, a wax cylinder, a radio broadcast. All of those formats have their own dynamics and sound limitations. Hope this helps.