Common Problems Arising in the Installation of Accessible Pedestrian Signals

Set the Automatic Volume Adjustment

Evaluate and set the sensitivity level of the automatic volume adjustment. If volumes are adequate in quiet conditions, but do not increase enough or quickly enough when ambient noise increases, the microphone sensitivity, or automatic gain control, may need to be increased. 

Increase the microphone sensitivity in 10% to 20% steps until the response is as desired. It might be necessary to readjust the volume of the locator tone and Walk indications after the microphone or “dB over ambient” setting is adjusted.