2006-12-24 00:41:39 · 3 answers · asked by ieatdeer 1 in Consumer Electronics ➔ Other - Electronics
A Decibel is a unitless measure. It is not watt or volts or anything. It is simply the ratio of one level to another. If you have an amplifier that doubles the voltage of a signal put into it, you have an amplifier with a 3 dB gain. If it doubles the power (watts), you still have a 3 dB gain.
To let you know what units are referenced, a subscript is added to the dB. A dBm is referenced to a milliwatt. In that case, a 3 dB gain will give you 2 milliwatts.
The expression dBi is used to define the gain of an antenna system relative to an isotropic radiator at radio frequencies. The symbol is an abbreviation for decibels relative to isotropic.
There are other reference levels. See the link below for more.
2006-12-24 09:15:15 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Decibel Watts are what power is needed to produce the decibels. Decibels in turn are the actual sounds level created by a certain amount of Decibel Watts.
2006-12-24 07:26:55 · answer #2 · answered by dayle123 3 · 0⤊ 1⤋
No
2006-12-24 07:24:08 · answer #3 · answered by megaris 4 · 0⤊ 0⤋