THE NOISE PROBLEM


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THE NOISE PROBLEM
THE NOISE PROBLEM178. Transformer noise. Transformers create noise when energized. Actually, the noise is a characteristic hum that is generated by vibrations in the laminated core structure. This hum has a fundamental frequency about twice that of the applied frequency. Its relative loudness to the ear is a function of transformer design and construction characteristics, the ambient noise level of the area where it is located, and the manner in which it is installed. In some applications, such as factories, transformer noise is masked by the higher level of surrounding noise, and it poses no problem. In low-noise-level or quiet areas (hospitals, schools, libraries, apartment buildings, office interiors, churches, etc.), transformer hum can be quite objectionable and ca…
Citation
Terrell Croft; Frederic P. Hartwell; Wilford I. Summers: American Electricians' Handbook, Sixteenth Edition. THE NOISE PROBLEM, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export