Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Decibel> ?p ?o. }
Showing items 1 to 42 of
42
with 100 items per page.
- Decibel abstract "The decibel (dB) is a logarithmic unit used to express the ratio between two values of a physical quantity, often power or intensity. One of these quantities is often a reference value, and in this case the decibel can be used to express the absolute level of the physical quantity. A common use of the decibel unit is to measure sound pressure. The decibel is also commonly used as a measure of gain or attenuation, the ratio of input and output powers of a system, or of individual factors that contribute to such ratios. The number of decibels is ten times the logarithm to base 10 of the ratio of the two power quantities. A decibel is one tenth of a bel, a seldom-used unit named in honor of Alexander Graham Bell.The decibel is used for a wide variety of measurements in science and engineering, most prominently in acoustics, electronics, and control theory. In electronics, the gains of amplifiers, attenuation of signals, and signal-to-noise ratios are often expressed in decibels. The decibel confers a number of advantages, such as the ability to conveniently represent very large or small numbers, and the ability to carry out multiplication of ratios by simple addition and subtraction. On the other hand, even some professionals find the decibel confusing and cumbersome.A change in power by a factor of 10 is a 10 dB change in level. A change in power by a factor of two is approximately a 3 dB change. A change in voltage by a factor of 10 is equivalent to a change in power by a factor of 100 and is thus a 20 dB change. A change in voltage ratio by a factor of two is approximately a 6 dB change.The decibel symbol is often qualified with a suffix that indicates which reference quantity or frequency weighting function has been used. For example, dBm indicates a reference level of one milliwatt, while dBu is referenced to approximately 0.775 volts RMS.The definitions of the decibel and bel use base 10 logarithms. The neper, an alternative logarithmic ratio unit sometimes used, uses the natural logarithm (base e).".
- Decibel wikiPageExternalLink owadisp.show_document?p_table=STANDARDS&p_id=9735.
- Decibel wikiPageExternalLink dB.html.
- Decibel wikiPageExternalLink calculator-soundlevel.htm.
- Decibel wikiPageID "8410".
- Decibel wikiPageRevisionID "606235084".
- Decibel hasPhotoCollection Decibel.
- Decibel subject Category:Acoustics.
- Decibel subject Category:Audio_electronics.
- Decibel subject Category:Radio_frequency_propagation.
- Decibel subject Category:Telecommunications_engineering.
- Decibel subject Category:Units_of_measurement.
- Decibel comment "The decibel (dB) is a logarithmic unit used to express the ratio between two values of a physical quantity, often power or intensity. One of these quantities is often a reference value, and in this case the decibel can be used to express the absolute level of the physical quantity. A common use of the decibel unit is to measure sound pressure.".
- Decibel label "Decibel (eenheid)".
- Decibel label "Decibel".
- Decibel label "Decibel".
- Decibel label "Decibel".
- Decibel label "Decibelio".
- Decibel label "Decybel".
- Decibel label "Dezibel".
- Decibel label "Décibel".
- Decibel label "Децибел".
- Decibel label "ديسيبل".
- Decibel label "デシベル".
- Decibel label "分貝".
- Decibel sameAs Decibel.
- Decibel sameAs Dezibel.
- Decibel sameAs Ντεσιμπέλ.
- Decibel sameAs Decibelio.
- Decibel sameAs Dezibel.
- Decibel sameAs Décibel.
- Decibel sameAs Decibel.
- Decibel sameAs デシベル.
- Decibel sameAs 데시벨.
- Decibel sameAs Decibel_(eenheid).
- Decibel sameAs Decybel.
- Decibel sameAs Decibel.
- Decibel sameAs m.02bn8.
- Decibel sameAs Q5329.
- Decibel sameAs Q5329.
- Decibel wasDerivedFrom Decibel?oldid=606235084.
- Decibel isPrimaryTopicOf Decibel.