Phase Delay Network for 3D Audio Enhancement

Posted on Feb 5, 2014

3D enhancement is needed to create a fully 3-dimensional sound for most stereo multimedia products. Usually, simple phase-delay circuits is used to produce a widening effect on the perceived sound field. However, there is transaural acoustic crosstalk effect. The following figure shows transaural acoustic crosstalk effect and schematic diagram of

Phase Delay Network for 3D Audio Enhancement
Click here to download the full size of the above Circuit.

simple phase-delay circuits : This is an active circuit that uses first-order section to present a phase-shift filter with ft of 1kHz for the quadrature signal and ft = 10kHz for the linear signal. It will produce 90 ° phase shift between the quadrature and linear signals over the audio bandwidth of 1kHz to 10kHz. [Source: maxim-ic. com]

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