Decibel is defined as a unit that indicates the presence of a tone relative to a reference pressure: dB 20 log (p/po) where p is the pressure of the tone and po is the reference pressure.

Related Articles

atmosphere at■■■
The term atmosphere may refer to the following:; - a gaseous layer enveloping a planet or other celestial body, . . . Read More
Loudness at■■
Loudness refers to the perception of the intensity of a sound; the quality of sound that ranges from . . . Read More
A MECHANICALLY VENTILATED CRAWLSPACE SYSTEM is a system designed to increase ventilation within a crawlspace, . . . Read More
ISO 3993 at■■
- ISO 3993:1996 : Liquefied petroleum gas and light hydrocarbons. Determination of density or relative . . . Read More
Pure tone at■■
. . . Read More
Gravure at■■
Gravure is a high quality printing process capable of producing printed images which have a continuous . . . Read More
ISO 7235 at■■
- ISO 7235:2003 : Acoustics. Laboratory measurement procedures for ducted silencers and air-terminal . . . Read More
Delayed coking at■■
Delayed coking refers to a process by which heavier crude oil fractions can be thermally decomposed under . . . Read More
Process manufacturing at■■
Process manufacturing revolves around the manufacture of products such as chemicals, gasoline, beverages, . . . Read More
Hertz (Hz) at■■
. . . Read More