What is 3dB and 6dB?

3dB and 6dB are terms used in audio and signal processing to describe changes in power levels. A change of 3dB typically represents a power increase or decrease by a factor of two; for example, doubling the power results in a 3dB increase. Similarly, a change of 6dB indicates a power change by a factor of four, meaning that quadrupling the power results in a 6dB increase. These measurements are logarithmic and help quantify the relative strength of signals or sound levels.