4 ms·

Wouldn’t it be based on a few factors? Rate, volume, etc? Not too different than radio at some level? I could be totally wrong. Guessing here. If in audible ra

Wouldn’t it be based on a few factors? Rate, volume, etc? Not too different than radio at some level? I could be totally wrong. Guessing here. If in audible range a faster song would have more data capability - techno vs hip hop? Ha.

83457 6y ago
Radio waves are electromagnetic while sound waves are a physical wave. I assume that having to actually move the air molecules would require a lot more power and time than electrons in an antenna as well as having to deal with air density and environmental sound interference. I would be interested in knowing the limit of bandwidth here though. It also brings up an interesting thought I never had before. With early home computers, and I assume before that as well, you would place a phone handset onto a coupler to receive data. It is odd to think now that there is a little air in there that is transferring sound between the handset speaker and the coupler microphone. I assume that without that little bit of air it wouldn't function.
- devthrowawy 6y ago
  All you need to know is the channel bandwidth (say 20-50khz) and noise floor power relative to rx power to give maximum data transfer rate (Shannon-Hartle theorem). Capacity = (Bandwidth) * log2 (1 + recieve_power / noise_floor_power). There is also a lot of em noise going on - just like sound. I would expect sound to be many orders of magnitude less power effecient/bit than EM - but the principles basically the same
  - dfischer 6y ago
    Thanks for adding color to the thoughts there. Appreciate it. Now I must go figure out intuitively why log is baked into the universe as a mathematical property...
- dfischer 6y ago
  How are electromagnetic waves not physical? Also if air was such an issue then the dynamics of a song being played live would be of series inconsistent patterns leading to error in rate based on environmental factors. Rate would be whatever air density allows but whether you received that rate is different. Song recorded vs song played vs song heard when recorded vs song heard when played over speakers. The waveform of both should be highly similar in a way that wouldn’t be considered error besides amplitude or echoes from acoustics. So it’s a distributed message sensing problem? In my perspective I just saw the waveform of a techno song == the rate of data being communicated. 120 bpm is 120 bpm. Loss over distance is it’s own factor based on ability to ack.
  - 83457 6y ago
    Physical waves need a medium for transfer and are affected by the density and properties of the material(s) involved.
    - dfischer 6y ago
      What isn’t a medium? A vacuum? Physical waves depend on a fluid? EM seems to be affected by a medium/fluid. Wonder where the distinctions are more poignant. Maybe degree of affects?

83457 6y ago

Radio waves are electromagnetic while sound waves are a physical wave. I assume that having to actually move the air molecules would require a lot more power and time than electrons in an antenna as well as having to deal with air density and environmental sound interference. I would be interested in knowing the limit of bandwidth here though. It also brings up an interesting thought I never had before. With early home computers, and I assume before that as well, you would place a phone handset onto a coupler to receive data. It is odd to think now that there is a little air in there that is transferring sound between the handset speaker and the coupler microphone. I assume that without that little bit of air it wouldn't function.

devthrowawy 6y ago
All you need to know is the channel bandwidth (say 20-50khz) and noise floor power relative to rx power to give maximum data transfer rate (Shannon-Hartle theorem). Capacity = (Bandwidth) * log2 (1 + recieve_power / noise_floor_power). There is also a lot of em noise going on - just like sound. I would expect sound to be many orders of magnitude less power effecient/bit than EM - but the principles basically the same
- dfischer 6y ago
  Thanks for adding color to the thoughts there. Appreciate it. Now I must go figure out intuitively why log is baked into the universe as a mathematical property...
dfischer 6y ago
How are electromagnetic waves not physical? Also if air was such an issue then the dynamics of a song being played live would be of series inconsistent patterns leading to error in rate based on environmental factors. Rate would be whatever air density allows but whether you received that rate is different. Song recorded vs song played vs song heard when recorded vs song heard when played over speakers. The waveform of both should be highly similar in a way that wouldn’t be considered error besides amplitude or echoes from acoustics. So it’s a distributed message sensing problem? In my perspective I just saw the waveform of a techno song == the rate of data being communicated. 120 bpm is 120 bpm. Loss over distance is it’s own factor based on ability to ack.
- 83457 6y ago
  Physical waves need a medium for transfer and are affected by the density and properties of the material(s) involved.
  - dfischer 6y ago
    What isn’t a medium? A vacuum? Physical waves depend on a fluid? EM seems to be affected by a medium/fluid. Wonder where the distinctions are more poignant. Maybe degree of affects?