Products
Rewards
from HOLOOLY

We are determined to provide the latest solutions related to all subjects FREE of charge!

Enjoy Limited offers, deals & Discounts by signing up to Holooly Rewards Program

HOLOOLY

HOLOOLY
TABLES

All the data tables that you may search for.

HOLOOLY
ARABIA

For Arabic Users, find a teacher/tutor in your City or country in the Middle East.

HOLOOLY
TEXTBOOKS

Find the Source, Textbook, Solution Manual that you are looking for in 1 click.

HOLOOLY
HELP DESK

Need Help? We got you covered.

## Q. 6.RQ.2

Define a decibel.

## Verified Solution

If a power ratio is $P_1/P_2,$ then the measure in decibels is $10 \log(P_1/P_2).$ Because power is proportional to voltage squared, and a transfer function would give a ratio of voltages, then the gain of a transfer function $G(jω)$ in decibels is $G_{db} = 20 \log |G(jω)|.$