| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Hum bars | Post & Telecom | Unwanted roughly sinusoidal low-frequency deviation at frequencies related to that of the mains supply. Hum is determined under specified conditions (1); disturbance due to a signal from the mains, and showing itself in a line-by-line scanning system by an appearance of horizontal streaks or bands on the reproduced picture (2); unwanted audible modulation arising from the tube voltage supplies (3). Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
