• Impulsive noise often referred as clicks or ticks
• Broadband noise often referred as hiss or background noise

 Here is a schematic diagram for removal of `clicks' based on Auto-regressive (AR) model.

 Here is a schematic diagram for hiss removal based on spectrum subtraction.

Here is examples of corrupted and restored tracks

Here is a comparison of the declicking results using different order.

 An expample of using spectrum subtraction for de-hissing.