Decibel

The decibel (dB) is a measure of the ratio between two quantities, and is used in a wide variety of measurements in acoustics and electronics. It is widely used as a measure of the loudness of sound. The decibel is a "dimensionless unit" like percent.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The intensity of a sound I can be expressed in decibels with the standard equation:

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

::I_mathrm{dB} = 10 log_{10} left(rac{I}{I_0} ight)

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

:where I0 is the quietest sound most people can hear, the threshold of hearing.

Ratio: In algebra, a ratio is the relationship between two quantities. It is expressed as the quotient of two numbers, or as two numbers separated by a colon (pronounced "to"). A number that can be written as a ratio of two integers is a rational number. In physics, a ratio between two magnitudes of the ...

Acoustics: Acoustics is a branch of physics and is the study of sound, mechanical waves in gases, liquids, and solids. A scientist who works in the field of acoustics is an acoustician. The application of acoustics in technology is called acoustical engineering. There is often much overlap and interaction bet...

Electronics: The field of electronics is the study and use of systems that operate by controlling the flow of electrons or other electrically charged particles in devices such as thermionic valves and semiconductors. The design and construction of electronic circuits to solve practical problems is part of the fi...

Decibel related Images and Photos (experimental)

New Warriors #12 Cover: Decibel