El decibelio en la ingeniería | 11/51 | UPV

Title: The Decibel in Engineering Description: Use of the decibel in engineering. Use of the decibel to measure attenuation and gain. Use of the decibel to perform logarithmic measurements. Camacho García, A. (2009). The Decibel in Engineering. http://hdl.handle.net/10251/4845 Automatic description: In this video, a professor from the Department of Communications at the Polytechnic University explains the use of the decibel in engineering to compare input and output power in linear systems, such as amplifiers and attenuators. The decibel is presented as a logarithmic measure that facilitates the representation of power amplification or loss, based on the linear relationship between input and output power, which is transformed into a value in decibels using a logarithmic expression. Throughout the video, practical examples are presented on how to calculate attenuation and gain in decibels, as well as the equivalences between linear relationships and their representation in decibels. It explains how to adapt the formula to measure other magnitudes such as voltages and currents, since powers are proportional to the square of the currents, resulting in the use of "twenty logarithms" instead of "ten logarithms" for its calculation. Finally, it discusses how decibels, while a relative unit for comparing powers, can measure other magnitudes in logarithmic units known as levels, such as dBm and dBV when referring to power and voltage, respectively. It also addresses its application in areas such as acoustics, using SPL to measure sound pressure levels. In short, the decibel is presented as a fundamental tool for evaluating amplification or attenuation in systems and its application in various engineering disciplines. Author: Camacho García Andrés Course: This video is video 11/51 of the Signal Processing in Communications course | Polytechnic University of Valencia (UPV).    • Curso Tratamiento de señales en comunicaci...   Polytechnic University of Valencia (UPV): https://www.upv.es More videos at:    / valenciaupv   Access our MOOCs: https://upvx.es #Decibel #Attenuation #Gain #Dbw #Dbm #Dbuv #Dbuv/m #Spl #Sound Pressure Level #