  In this paper, two microphone based systems for audio zooming is proposed for
the first time. The audio zooming application allows sound capture and
enhancement from the front direction while attenuating interfering sources from
all other directions. The complete audio zooming system utilizes beamforming
based target extraction. In particular, Minimum Power Distortionless Response
(MPDR) beamformer and Griffith Jim Beamformer (GJBF) are explored. This is
followed by block thresholding for residual noise and interference suppression,
and zooming effect creation. A number of simulation and real life experiments
using Samsung smartphone (Samsung Galaxy A5) were conducted. Objective and
subjective measures confirm the rich user experience.
