Disclosed herein are portable devices and methods for their use. A portable device, in particular a mobile phone or smart watch, which includes at least a main body that includes a screen for outputting visual information, an acoustic output means for outputting acoustic information, in particular a speaker, a processor unit for operating the portable device, a communication means for transmitting data and/or signals, in particular wirelessly, to another device, in particular a further portable device or a server device, an electric energy source for powering the portable device, and a sensor means for detecting at least one effect subjected onto the portable device; and a microphone unit for receiving acoustic waves, wherein the microphone unit includes a microphone, a transfer unit for positioning the microphone between two end-positions and an actuator for moving the microphone between the end-positions, wherein the processor unit operates the actuator in dependency of data or signals provided by the sensor means.