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Step 2: Metal Loss
1.
Set up the FSM, ensuring that the two vertical arrows in the
top-right corner of the device are placed at the correct height:
•
3’ 9” for seated user.
•
5’ 6” for standing users.
A
tripod or similar for mounting the FSM is recommended.
2. Connect the TSG to the line input of the hearing loop driver.
Step 1: Background Noise Level
This test should be performed prior to loop installation.
1.
Set up the FSM, ensuring that the two vertical arrows in the
top-right corner of the device are placed at the correct height:
•
3’ 9” for seated user.
•
5’ 6” for standing users.
A
tripod or similar for mounting the FSM is recommended.
2. Any lights or equipment normally active in the surrounding area
should be turned on to ensure an accurate testing environment.
3. Set the FSM to the Background Noise mode – “A-weighted”.
4.
Measure and note the background noise level throughout the
looped area on the Compliance Certificate document.
5. Listen to the loop through the FSM (A-weighted) or a loop listener
(A-weighted). Note and demonstrate any interference to the
customer which may not be heard through a hearing instrument.
6. Background magnetic noise must be between -32dB and -60dB. If
the readings noted pass the Compliance Certificate document’s
requirements, move on to Step 2: Metal Loss.
