Pink Noise is a mixture of sound waves with an intensity that diminishes proportionally with frequency to yield approximately equal energy per octave. This track is in Stereo.

Pink Noise is a mixture of sound waves with an intensity that diminishes proportionally with frequency to yield approximately equal energy per octave. This track is in Mono. 

Brown noise is better known as Brownian noise. It has higher intensity at lower frequencies. This episode is in MONO.Some people prefer mono to stereo as it provides less distraction. 

Brown noise is better known as Brownian noise. It has higher intensity at lower frequencies. This episode is in Stereo.