3M G5 Technisches Bulletin - Seite 4

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5. Inbound Mic Noise Reduction Level setting on basestation

The inbound microphone noise reduction level setting helps remove the background (ambient) noise that is picked up by the

microphone at the Order Point, when a customer is placing an order. The basestation's noise reduction level is factory set to

Medium.

The way Noise Reduction works can be better understood by imagining a cone being present in front of the microphone.

--- NR being set to OFF is akin to having the cone wide open.

This allows more of the ambient sound into the microphone and thus

--- NR being set to MAX is similar to constricti n g the cone to a smaller angle

This limits the angle to where the customer is most probably located. A small amount of ambient noise may still

make it's way into the microphone. The system's noise cancellation algori t hm will be able to minimize such small ambient

noise.

A customer's voice level is usually around ~62dB. If the ambient noise, measured at 1 meter from the axis of the Order Poi n t

microphone, is greater than, say 65dB, there is very good probability for the customer's audio to be mixed in with the ambient noi s e.

In this event, you may have to reduce the Noise Reduction setting so as to allow more of the audio into the microphone, otherwise

the system may reduce the customer's audio while trying to minimi z e the ambient noise.

Perform the foll o wing steps to decrease the noise reduction level.

•

From the Run mode menu

•

Enter your user passcode. (The default user passcodeis 1234)

•

Press Mode again. The display will show the user name and ID number (e.g., User1 ID = 1).

•

Make a new selection for 05 Noise Reduction > Inbound Mic Noise Reduction Level.

Options are Off, Min, Low, Med, Hi, and Max.

You may need to experiment for a setting that works best for your ambient noise environment.