A noise prediction wave based geometrical acoustics software which simulates and predicts Outdoor Sound Propagation and Noise Barrier efficiency, taking into account geometrical spreading, atmospheric absorption, atmospheric turbulence, ground and objects impedance, spherical wave reflection and diffraction effects of natural or man-made objects in a 3D environment. The software produces unique sound mapping demonstrating wave interference, calculates Impulse Response and displays Frequency Response results in high frequency resolution, 1/3, 1/1 octave bands and dB(A).