From the AD Series news archive. This article records the announcement or update at the time shown.

AD Series 28-inch passenger information display hardware
Product image of the 28-inch display range; not a photograph of the four trial installations.

Designed for street noise

The package combines upgraded speakers, an amplifier and an ambient-noise microphone with dynamic volume adjustment. It responds to surrounding noise rather than relying on a fixed announcement level.

Tested in operation

Four upgraded displays were evaluated with passing traffic, idling buses and changing street noise. AD Series reported clear announcements across the test units, with further software and firmware refinements under evaluation.