Accoustic processor for a mobile device

An acoustic processor for a mobile device, the mobile device comprising a speaker including a speaker membrane, the speaker membrane having a first speaker membrane side and second speaker membrane side opposite the first speaker membrane side, a mobile device housing having a first aperture at a front side of the mobile device for providing a first acoustic path between the first speaker membrane side and the exterior of the mobile device and having a second aperture at a back side of the mobile device for providing a second acoustic path between the second speaker membrane side and the exterior of the mobile device;

• the acoustic processor being configured and arranged to:
• sense a signal on an acoustic processor input, the signal being induced on at least one terminal of the speaker in response to acoustic waves received from an acoustic source that is behind the mobile device and from an acoustic source that is in front of the mobile device;
• process the induced signal to discriminate between the acoustic waves received from the acoustic source that is behind the mobile device and from the acoustic source that is in front of the mobile device;
• and output the processed signal on an acoustic processor output.