If you've seen any old gangster movies, you're probably familiar with the phrase: "Calling all cars, calling all cars!" It became a cliche for when police headquarters sent out an alert via radio. But radio hasn't been around forever. And at the dawn of radio technology, there were some pretty goofy-looking devices anticipated for the policeman of the future.
Tagged With radio-craft magazine
In the 1930s, audio tech nerds were tinkering with everything. The most futuristic model homes of the day were wired for sound in every room, home audio recording was being introduced and the LP was invented to use as audiobooks for the blind. Even things we'd consider mundane today got the radio treatment in order to make them high-tech. One of those things was the police line-up, seen above wired for sound in 1931.