| 摘要 |
A circuit arrangement for automatically adapting the volume of a loudspeaker to an interfering noise level prevailing at the loudspeaker location is specified, particularly for mobile radio receivers such as car radios or the like, which exhibits an adjustable function network (18) with a transfer function, which generates a correcting variable for a volume controller (11) in dependence on the interfering noise level in such a manner that the useful voltage level at the loudspeaker is logically combined with the interfering noise level via a predetermined characteristic. For the purpose of adapting the volume to the interfering noise level in accordance with an individual characteristic which can be automatically adapted to the situation in an internal vehicle space and to the requirements and the auditory sensation of the motor vehicle passengers, a curve adaptor (19) is connected to the function network (18) and a volume control (12), which adjusts the function network (18) in such a manner that the predetermined characteristic can be modified at least section by section in dependence on the operation of the volume control (Figure 1). <IMAGE>
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