A communication device comprising: a microphone signal path, termed MSP, the microphone signal path comprising a microphone unit, an MSP-signal processing unit comprising an MSP-filter having configurable filtering characteristics, and a transmitter unit operationally connected to each other and configured to transmit a processed signal originating from an input sound picked up by the microphone unit; a loudspeaker signal path, termed SSP, the loudspeaker signal path comprising a receiver unit, an SSP-signal processing unit comprising an SSP-filter having configurable filtering characteristics, and a loudspeaker unit operationally connected to each other and configured to provide an acoustic sound signal originating from a signal received by the receiver unit, wherein the communication device is further characterized by comprising a control unit configured to: dynamically controlling the configurable filtering characteristics of the MSP-filter and the configurable filtering characteristics of the SSP-filter, based on one or more control input signals to the control unit dependent of a property of a signal of the MSP and/or a signal of the SSP, and dynamically controlling the configurable filtering characteristics of the MSP-filter and the SSP-filter while keeping the MSP-filter characteristics complementary to the SSP-filter characteristics such that the SSP-filter is configured to pass a first subset of frequency bands and either block or attenuate a second set of frequency bands while the MSP-filter is simultaneously configured to pass the second set of frequency bands and block or attenuate the first set of frequency bands. a microphone signal path, termed MSP, the microphone signal path comprising a microphone unit, an MSP-signal processing unit comprising an MSP-filter having configurable filtering characteristics, and a transmitter unit operationally connected to each other and configured to transmit a processed signal originating from an input sound picked up by the microphone unit; a loudspeaker signal path, termed SSP, the loudspeaker signal path comprising a receiver unit, an SSP-signal processing unit comprising an SSP-filter having configurable filtering characteristics, and a loudspeaker unit operationally connected to each other and configured to provide an acoustic sound signal originating from a signal received by the receiver unit, wherein the communication device is further characterized by comprising a control unit configured to: dynamically controlling the configurable filtering characteristics of the MSP-filter and the configurable filtering characteristics of the SSP-filter, based on one or more control input signals to the control unit dependent of a property of a signal of the MSP and/or a signal of the SSP, and dynamically controlling the configurable filtering characteristics of the MSP-filter and the SSP-filter while keeping the MSP-filter characteristics complementary to the SSP-filter characteristics such that the SSP-filter is configured to pass a first subset of frequency bands and either block or attenuate a second set of frequency bands while the MSP-filter is simultaneously configured to pass the second set of frequency bands and block or attenuate the first set of frequency bands.