Guidelines for the dimensioning of induction loop systems.
For various loop configurations the long-term rms current required to produce a specified magnetic field is given by a simple formula, containing the average loop width as the only loop geometry parameter. A simplified and easy to use formula for loop inductance facilitates the determination of the impedance presented to the loop amplifier. The amplifier requirements are heavily dependent upon field strength specification and impedance of the loop. Taking these factors into account, an economical and correct dimensioning of the amplifier and loop system may be obtained.
D000162:Acoustics; D000669:Amplifiers, Electronic; D004867:Equipment Design; D006310:Hearing Aids; D008280:Magnetics