Audio broadcast via a physical wire

In summary, the emergency broadcast system (EBS) allows for the transmission of urgent audio and text messages to people across the country. It is used in case of natural disasters or other emergencies.
  • #1
kadiot
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Is there a way to broadcast emergency messages via cable radio? Its not really radio but audio going out from copper or fiber using existing landlines or CATV cables. No tuner needed, could just be a speaker. The system I am looking for does not need internet or mobile connections. I imagine it is an analog connection via a physical wire. But instead of listening to an audio recording via a handset, we can listen through a speaker.

Thank you.
 
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  • #2
Yes. It was invented by Alexander Graham Bell.
 
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  • #3
anorlunda said:
Yes. It was invented by Alexander Graham Bell.
Yes, but how? Do you have the technology? Care to share? Thanks.
 
  • #6
What is the expected range?
 
  • #7
Here is the rationale:
1. Use of landlines is declining
2. In a disaster or emergency, cell sites may not work
3. Not everyone has UHF or VHF radio
4. In many places, landlines are still available or operational
5. AM and FM radio could still work, but additional means would still be welcome 6. cable radio going through landlines is one possible additional means
 
  • #8
It sounds like you're talking about a remote address public address system. The man in the weather center shouts TORNADO into the microphone, and every house has a speaker to repeat that. Is that it?

Radio is better suited for that. The maintenance cost of landlines is extremely high. Think of all those crews you see parking their work truck near the road with a whole crew of men standing by.

Edit: A siren is also better for that purpose.
 
  • #9
anorlunda said:
Edit: A siren is also better for that purpose.
But how will we tell the difference between an Amber Alert and a tornado warning and 12:00 noon and...
🧐
 
  • #10
chemisttree said:
But how will we tell the difference between an Amber Alert and a tornado warning and 12:00 noon and...
They already do that. They have coded pulses (blasts) for different events. There is not necessarily a code for all possible alerts, but enough.

I once lived in a village which had fire alarm boxes mounted on the telephone poles. Each one had a code identifying the location. (The alarm box was an automated telegraph, yet another Thomas Edison invention.) At the fire station, they repeated that code on the siren so that firefighters could respond directly to the scene rather than going to the firehouse first. If I remember right, it was a two digit nonary system, which allows for 81 locations.
 
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1. What is audio broadcast via a physical wire?

Audio broadcast via a physical wire refers to the transmission of sound signals through a physical medium, such as a wire or cable. This allows for the transfer of audio data from one point to another, such as from a microphone to a speaker.

2. How does audio broadcast via a physical wire work?

Audio broadcast via a physical wire works by converting sound waves into electrical signals, which are then transmitted through the wire. The electrical signals are received at the other end and converted back into sound waves, allowing for the audio to be heard.

3. What are the advantages of using a physical wire for audio broadcast?

Using a physical wire for audio broadcast has several advantages, including a more reliable and stable connection compared to wireless methods. It also allows for higher quality audio transmission and is not affected by interference from other electronic devices.

4. Are there any limitations to audio broadcast via a physical wire?

One limitation of audio broadcast via a physical wire is the distance that the audio can be transmitted. The longer the wire, the weaker the signal becomes, resulting in potential loss of audio quality. Additionally, physical wires can be more cumbersome and less convenient compared to wireless methods.

5. How is audio broadcast via a physical wire different from wireless audio transmission?

The main difference between audio broadcast via a physical wire and wireless audio transmission is the medium used for transmitting the audio signals. Physical wires use a physical medium, such as a cable, while wireless methods use radio waves to transmit the audio. This can result in differences in audio quality, reliability, and convenience.

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