Can Wi-Fi reach a swimmer in a fresh water pool?

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SUMMARY

Wi-Fi signals, specifically those operating at 2.4 GHz, penetrate fresh water pools to a maximum depth of approximately 3 centimeters (1 inch) due to the absorption characteristics of water. The presence of dissolved salts and cleaning agents, such as chlorine, further reduces signal penetration. Users should manage their expectations regarding Wi-Fi connectivity while swimming, as practical testing is recommended for accurate results. The discussion highlights the significant impact of water salinity and ion concentration on radio wave transmission.

PREREQUISITES
  • Understanding of 2.4 GHz Wi-Fi technology
  • Basic knowledge of radio wave propagation
  • Familiarity with the effects of salinity on signal transmission
  • Awareness of the impact of cleaning agents on water conductivity
NEXT STEPS
  • Research the effects of water salinity on radio wave absorption
  • Explore alternative wireless technologies for underwater communication
  • Investigate the impact of different cleaning agents on Wi-Fi signal strength
  • Conduct practical experiments to measure Wi-Fi penetration in various water conditions
USEFUL FOR

Individuals interested in underwater communication technologies, swimming pool owners, and engineers exploring wireless signal propagation in aquatic environments.

markg2
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Approximately how far will a signal penetrate a fresh water pool from the surface to a swimmer assuming current Wi-Fi standards?

With at least 6-8" of water penetration I would purchase an iPod Touch and listen to streaming radio while doing laps.

Thanks,

Mark
 
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Got this from http://www.network-builders.com/wifi-range-under-water-t38480p2.html
Not sure how accurate. In fact, one inch seems a little low. But i don't know.
Another site forum suggested that 1 meter is max.

"Radio waves generally penetrate water to around 1/4 wavelength.
considering the wavelength of 2.4 Ghz WiFi is about 0.13m (13Cm) you
can expect a useable range of around 3 Cm (a little over 1 Inch )"
 
The problem lies in the salinity of the water and the amount of free ions. Pure, distilled water will not absorb radio waves to a large degree. However, the dissolved salts and other ions in water greatly adds to its conductivity and suppresses the transmissions of radio waves. I would say that with pool water, I would not expect much penetration due to the addition of cleaning agents such as chlorine. But without having any numbers or experiments with this situation most of us are probably only going to be able to give you an educated guess. Best bet would be to just try it out and see but keep expectations reserved.
 

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