Circuit/System Description

Each of the Pedestrian Friendly Alert Speaker channel circuits (+) and (-), at the K132 Pedestrian Alert Sound Control Module have a DC bias voltage that is approximately one half of battery voltage. The audio being played on the system is produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone to move and produce sound.

Each of the Pedestrian Friendly Alert Speaker channel circuits (+) and (-), at the K132 Pedestrian Alert Sound Control Module have a DC bias voltage that is approximately one half of battery voltage. The audio being played on the system is produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone to move and produce sound.