Safety on Tap

Ep216 Resonance and understanding, with Andrew Barrett

Safety on Tap

Show Notes

Full show notes: www.safetyontap.com/ep216 Radio, television, and the content we consume have changed enormously since I was a kid. This is a podcast about the physics, and the metaphor of this change and how we can change too, but only if we want to remain resonant. Hey, it's Andrew, and this is Safety on Tap. Since you're listening in, you must be a leader wanting to grow yourself and drastically improve health and safety along the way. Welcome to you, you're in the right place. If this is your first time listening in, thanks for joining us and well done for trying something different to improve! And of course welcome back to all of you wonderful regular listeners. There used to be just a handful of TV stations, and a handful of radio stations. It was kind of easy as a kid, because the TV guide fit onto a single page in the newspaper, and the discussion about what to watch was easier because there were only a few options to choose from. Cartoons on Channel 7 on the afternoons we were allowed to watch TV, then Channel 2 at 6pm for the ABC news, on Wednesdays the highlight of the TV week was a bit of police drama with Blue Heelers on Channel 7 at 8.30, and Friday night football on Channel 9 kicked off the sporting entertainment of the weekend. Bandwidth used to be a constraint. On the radiomagnetic spectrum, there are only a limited number of frequencies which TV or radio could use to broadcast their content to you. Even if you have a digital radio in your car or at home, you can still see the remnants of this bandwidth constraint, when a radio station includes a number in the name - Mix 106.5, 104.1 Today FM. The number is the actual frequency (measured in Mega Hz for FM stations), the actual number of times the wave goes up and down per second. That number meant it was easy for you to tune into the right station, to listen to what they had to offer, loud and clear. If you were one point off, one tweak of the dial, and not only did you have the wrong frequency, you had garbled, snowy, or no radio content to listen to. There is no doubt that the use of the radiomagnetic spectrum for communication, and its associated constraint of a limited number of frequencies, shaped our culture enormously. Until the constraint disappeared. With the internet we went from limited bandwidth to broadband - because we jumped off the radiomagnetic spectrum and entered a world of limitless channels to choose from, unlimited space for broadcast, and people who were more than happy to no longer be constrained to the 3 or 5 channels they used to have to choose from.

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