SpatialAudio

This package provides a realtime audio filter which simulates binaural (or surround) sound using normal stereo headphones. You can get spatial sound with simple drag and drop!
The filter works by augmenting the existing AudioSource component. Just drag and drop the SpatialAudioSource component onto an existing audio source and add the SpatialAudioListener onto your existing AudioListener.
Unity provides 3D sound by using volume to simulate distance, panning to simulate left and right, and the doppler effect to simulate relative velocity. However it does not provide any audio cues for front and back, or when sounds are occluded. The Spatial Audio package improves this by adding left/right phase adjustment, and frequency filtering to simulate sound from the rear.
The package also simulates sound damping as a result of being occluded. These subtle adjustments in sound give a significant improvement in spatial awareness to the player.
Hear the demo for yourself!