Patent ID: 8472635

Claim:
A system for countering ambient noise when operating an address system in at least one compartment of a passenger transport unit comprising a plurality of operating conditions, the system comprising: a noise control unit; an audio sensor, said audio sensor being situated at one locus of said passenger transport unit, said audio sensor capturing audio information from said one locus for each operating condition of said passenger transport unit, wherein each operating condition provides a different level of ambient noise; and at least one memory unit coupled with said noise control unit and said audio sensor, said at least one memory unit storing the captured audio information and a plurality of predetermined factors relating to noise characteristic information relating with the stored captured audio information associated with each operating condition of said passenger transport unit; said noise control unit employing at least one selected factor of said plurality of factors for a particular operating condition from said plurality of operating conditions to effect said countering of ambient noise during said particular operation condition.