March 10, 2010
When a noise signal is fed into both inputs of a vocoder the noise sound will be transformed into a sound that is immediately associated with rain or a running stream of water. Pink noise and a good quality vocoder will give a very convincing sound of a running stream, in fact the more convincing the better the quality of the vocoder. While the vocoder produces the character of running water or falling drops of water, the colour of the noise will define the association with a certain natural phenomenon. White, pink and blue noise might sound like rain, a fast running stream from a short distance, a slow running stream from a long distance, a quietly babbling stream, a high pressure jet of water, etc. Red and Brownean noise will sound more like thunder from a distance or an earthquake.