Hearing Loop Field Strength Meter


The Hearing (Induction) Loop Field Strength Meter is a tool used for evaluating the performance of an induction (hearing) loop system during installation and maintenance. With easy-to-use controls, it provides dB readings that help loop installers and users calibrate and monitor magnetic loop signals. It gauges the RMS signal energy, checking the loop’s audio frequency to ensure it meets the worldwide IEC 60118-4 standard.

The Field Strength Meter helps assist in measuring, adjusting and commissioning a hearing loop system by measuring magnetic loop signals and testing for Electromagnetic Background Noise. Lightweight, ergonomic meter has two calibrated measuring functions and two types of filters for removing background noise and adjusting magnetic field intensity. Filter measuring functions by the basis of the listening curve of human ears (A) or by the basis of their physical values (Norm). Measure the loop signal function for background noise (-20dB) or field strength (– 0dB) with the selection button. Provided headphone jack allows the user to listen to the loop output while evaluating the loop field strength.


  • Conforms to IEC 60118-4: 2006 standard
  • Adjustment possibilities for two test ranges:
    • background noise
    • field strength
  • 3.5mm Headphone Jack for real time background noise monitoring
  • Low-Battery indicator
  • Color-coded display of field strength
  • Lightweight, Ergonomic Design
  • RMS-measuring range calibrated to 400mA/m = 0dB
  • Switchable A weighted filter


True RMS: 125 ms average time
Measuring range: +6 dB -40 dB (0 dB = 400mA/m)
Power supply: 2x 1.5V AA batteries
Display: LED Battery status control
Field strength: LED-Scale (1dB resolution)
Output: 3.5 mm stereo headphone jack with volume control
Dimensions: 3.3″ x 5″ x 1.4″ (83 x 126 x 35 mm)
Weight: 6.0 oz. (170 g) (incl. batteries)
Warranty: 2 years



2 Years

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