How can I transmit a static frequency through a copper wire coil

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SUMMARY

The discussion focuses on transmitting a 528 Hz signal through a copper wire coil, emphasizing the challenges of efficiency at lower frequencies. It references the Navy's historical use of 10 kHz signals, which required megawatts of power and extensive antenna systems. For smaller applications, such as in public halls or churches, a 1 or 2 turn loop fed by a 30 to 100-watt audio amplifier is recommended to create a varying magnetic field, which can be detected by hearing aids or suitable coils with amplifiers.

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  • Understanding of audio amplification techniques
  • Knowledge of electromagnetic field principles
  • Familiarity with copper wire coil construction
  • Experience with signal transmission methods
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  • Research audio amplifier specifications for optimal power output
  • Explore electromagnetic field generation using copper coils
  • Learn about the design and implementation of loop antennas
  • Investigate the compatibility of hearing aids with varying magnetic fields
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Audio engineers, electrical engineers, and anyone interested in signal transmission and electromagnetic field applications.

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I am trying to figure out how to program a 528 hz signal to emit and amplify through a copper wire coil
 
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The lower the frequency the less efficient it is to transmit it. For instance the Navy used to transmit signals to submarines at 10 kHz with an antenna system in Michigan but they used megawatts of power and many miles of antennas.

How far do you need to transmit the signal?
 
Some libraries or other public halls and churches use a 1 or 2 turn loop around the room and feed it directly from a powerful audio amplifier. These amplifiers are about 30 watts for a small room up to 100 watts or so for a large room.

This sets up a varying magnetic field in the room and this can be picked up by some hearing aids or by a suitable coil with an amplifier.
 

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