- Published in issue 3/1999 on page 22
white or pink noise at the flick of a switch
Strictly speaking, noise is a composite of a great number of signals at many, varying frequencies. It is a random quantity which generally has no regular or repetitive character. Although it is usually an unwanted quantity, noise may be used to analyse the performance of an audio system. A noise generator is, therefore, indispensable for much work in an audio workshop. Unfortunately, many amateur audio enthusiasts find the price of noise generators beyond their means. For them, this article describes an affordable, small noise generator that is easy to build.