What is Decibel?
A decibel (dB) is a logarithmic unit used to express the ratio between two values, commonly power or intensity. In the electrical field, decibels are used to describe signal gains or losses in systems like amplifiers, wiring, or speakers. Since it’s a logarithmic scale, a small change in decibels can represent a large difference in actual signal strength.
In residential and commercial electrical installations, decibel measurements can help electricians evaluate audio system performance or determine interference in signal cables. For example, a high decibel loss across a long cable might indicate poor connections or excessive resistance. Electricians may use specialized meters to assess these values during installations or troubleshooting, ensuring system efficiency and signal clarity.
