Abstract3.1 Introduction3.2 Microchip dsPIC33 Digital Signal Controller3.3 High Pass Filter3.4 Fast Fourier Transform3.5 Channel Energy Computation3.6 Channel SNR Computation3.7 VAD Decision3.8 VAD Hangover3.9 Computation of Scaling Factor3.10 Scaling of Frequency Channels3.11 Inverse Fourier Transform3.12 Application Programming Interface3.13 Resource Requirements3.14 Microchip PIC Programmer3.15 Audio Components3.16 VAD and Background Noise Reduction Techniques3.17 Results and Discussion3.18 Conclusion and Discussion