I estimate up to somewhere in the range 100kbit/s to 500kbit/s.
It would take a sophisticated modulation scheme, like a modem. The sound would be similar to white noise. Software that's getting 20bit/s or whatever is using old-school tone-based modulation, but it is quite robust in the presence of other sounds.
That assumes:
- Frequency response ~20kHz.
- Audio ADC/DAC sample rates configurable well in excess of the Nuqyist limit of the frequency response range of the speakers and mics.
- Good signal to noise (~90dB), which equates to ~15 bits at max volume range.
- Not playing at max volume, but a reasonable level ~18dB down, so ~12 bits.
- A very quiet environment, or one where the background sound is very predictable.
- Stereo laptop speakers and stereo mics, to make a 2x2 MIMO spatially modulated channel.
Because of this I just figured out why white noise is truly random and can’t communicate any data. I wasn’t thinking of it intuitively that way before even knowing conceptually of randomness and entropy and Cosmic background radiation.
Thanks!
Interesting...
If white noise “exists” and is constantly being received does it have an energetic value? Hmm.
A lot of the attributes you describe are the attributes that humans have for hearing and perception as a range, no?
Interesting if there is a particular reason our bodies converged to this state because of a link to sound and resiliency to information communication. I need to think on that one.
It would take a sophisticated modulation scheme, like a modem. The sound would be similar to white noise. Software that's getting 20bit/s or whatever is using old-school tone-based modulation, but it is quite robust in the presence of other sounds.
That assumes:
- Frequency response ~20kHz.
- Audio ADC/DAC sample rates configurable well in excess of the Nuqyist limit of the frequency response range of the speakers and mics.
- Good signal to noise (~90dB), which equates to ~15 bits at max volume range.
- Not playing at max volume, but a reasonable level ~18dB down, so ~12 bits.
- A very quiet environment, or one where the background sound is very predictable.
- Stereo laptop speakers and stereo mics, to make a 2x2 MIMO spatially modulated channel.
- Good channel separation (~80dB).
- Great linearity, which might be optimistic.