NTi Audio Minilyzer ML1 - Manual (Page 41)

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4. INDUCTION LOOP MODE (OPTIONAL)
The induction loop mode is available upon installation of the MiniLINK
PC interface. The Minilyzer simplifies verifications and adjustments of
AFILS (Audio Frequency Induction Loop Systems). AFIL systems are
used in public buildings to increase the speech intelligibility for users of
hearing aids. Most hearing aids have a built in magnetic coil receiving
audio signals generated by induction loop systems. AFIL systems
consist of a wire loop and a current amplifier generating a magnetic
field into the hearing aid, modulated by the audio input signal, e.g.
voice. Adjustment and verification of AFIL systems is described in the
IEC 60118 standard. The Minilyzer, together with an induction
loop receiver, is an ideal tool to accomplish the necessary
measurements.
Induction Loop Receivers
There are various induction loop receivers available from different
AFILS components manufactures. All known types work together with
the ML1. Some receivers have a built in A-weighting filter, which must
be disabled to prevent measurement errors.
Activation of the Induction Loop Mode
Fig 4.1 Setup Induction Loop Mode
• Enter the setup page of the
ML1
• Change the position “Ind.
loop mode” to “ENABLE”
• Press ESC key to exit the
setup page
After this the ML1 restarts in the induction loop measurement mode. To
return to the common ML1 measurement mode, disable the induction
loop mode in the setup page again.
Induction Loop Mode