ADAPTIVE VOLUME CONTROL SYSTEM
Original Publication Date: 1996-May-01
Included in the Prior Art Database: 2002-Apr-18
In a mobile radio environment, comprising a mobile two-way radio device mounted in a service vehicle, there is a noted problem maintaining an appropriate output volume, above the vehicle's ambi- ent noise level, to the radio operator. The ambient noise present in the vehicle may include road noise, wind noise, engine noise, other radios' audible out- put (e.g., AM/FM broadcast, other band radio), and talking. For relatively long periods of time, the ambi- ent noise is not stationary, that is, its statistical char- acteristics are not constant over long periods oftime. The current method of maintaining an acceptable output volume level is strictly manual, and places the burden of monitoring and adjusting the output volume level entirely on the radio operator.