Editing Decibel (section)

=== List of suffixes in alphabetical order ===

==== Unpunctuated suffixes ====
; dB{{sub| A}} : see [[dB(A)]].
; dB{{sub| a}} : see [[dBrn adjusted|dB{{sub| rn}} adjusted]].
; dB{{sub| B}} : see [[dB(B)]].
; [[dBc|dB{{sub| c}}]] : relative to carrier – in [[telecommunications]], this indicates the relative levels of noise or sideband power, compared with the carrier power. 
; dB{{sub| C}} : see [[dB(C)]].
; dB{{sub| D}} : see [[dB(D)]].
; dB{{sub| d}} : dB(dipole) – the forward gain of an [[antenna (electronics)|antenna]] compared with a half-wave [[dipole antenna]]. 0&nbsp;dBd = 2.15&nbsp;dB{{sub| i}}
; dB{{sub| e}} : dB electrical.
; dB{{sub| f}} : dB(fW) – power relative to 1&nbsp;[[femtowatt]].
; [[dBFS|dB{{sub| FS}}]] : dB([[full scale]]) – the amplitude of a signal compared with the maximum which a device can handle before [[clipping (signal processing)|clipping]] occurs. Full-scale may be defined as the power level of a full-scale [[Sine wave|sinusoid]] or alternatively a full-scale [[Square wave (waveform)|square wave]]. A signal measured with reference to a full-scale sine-wave appears 3&nbsp;dB weaker when referenced to a full-scale square wave, thus: 0&nbsp;dB{{sub| FS}} (fullscale sine wave)&nbsp;= −3&nbsp;dB{{sub| FS}} (full-scale square wave).
; dB{{sub| G}} : [[G-weighted]] spectrum
; dB{{sub| i}} : dB(isotropic) – the forward [[antenna gain|gain of an antenna]] compared with the hypothetical [[isotropic antenna]], which uniformly distributes energy in all directions. [[Linear polarization]] of the EM field is assumed unless noted otherwise.
; dB{{sub| iC}} : dB(isotropic circular) – the forward gain of an antenna compared to a [[Circular polarization|circularly polarized]] isotropic antenna. There is no fixed conversion rule between dB{{sub| iC}} and dB{{sub| i }}, as it depends on the receiving antenna and the field polarization.
; dB{{sub| J}} : energy relative to 1&nbsp;[[joule]]: 1&nbsp;joule&nbsp;= 1&nbsp;watt-second&nbsp;= 1 watt per hertz, so power spectral density can be expressed in dB{{sub| J }}.
; dB{{sub| k}} : dB(kW) – power relative to 1&nbsp;[[kilowatt]].
; dB{{sub| K}} :'''dB(K)''' – decibels relative to [[kelvin]]: Used to express [[noise temperature]].
; [[dBm|dB{{sub| m}}]] : dB(mW) – power relative to 1 [[milliwatt]]. 
; dB{{sub| m²}} or dB{{sub| sm}} : dB(m²) – decibel relative to one square meter
; [[dBm0|dB{{sub| m0}}]] : Power in dB{{sub| m}} measured at a zero transmission level point.
; dB{{sub| m0s}} : Defined by ''Recommendation ITU-R V.574''.
; dB{{sub| mV}} : dB(mV<sub>RMS</sub>) – voltage relative to 1&nbsp;millivolt across 75&nbsp;Ω.
; dB{{sub| o}} : dB optical. A change of 1&nbsp;dB{{sub| o}} in optical power can result in a change of up to 2&nbsp;dB{{sub| e}} in electrical signal power in system that is thermal noise limited.
; dB{{sub| O}} : see dB{{sub| ov}} 
; dB{{sub| ov}} or dB{{sub| O}} : dB(overload) – the amplitude of a signal (usually audio) compared with the maximum which a device can handle before [[Clipping (signal processing)|clipping]] occurs.
; dB{{sub| pp}} : relative to the peak to peak [[sound pressure]].
; dB{{sub| pp}} : relative to the maximum value of the peak [[electrical power]].
; dB{{sub| q}} : dB(quarterwave) – the forward gain of an antenna compared to a quarter wavelength whip. Rarely used, except in some marketing material. 0&nbsp;dBq&nbsp;= −0.85&nbsp;dB{{sub| i}}
; dB{{sub| r}} : dB(relative) – simply a relative difference from something else, which is made apparent in context.  The difference of a filter's response to nominal levels, for instance.
; [[dBrn|dB{{sub| rn}}]] : dB above [[reference noise]].  See also '''dB{{sub| rnC}}'''
; dB{{sub| rnC}} : '''dB{{sub| rnC}}''' represents an audio level measurement, typically in a telephone circuit, relative to the [[circuit noise level]], with the measurement of this level frequency-weighted by a standard C-message weighting filter.  The C-message weighting filter was chiefly used in North America.
; dB{{sub| sm}} : see dB{{sub| m²}}
; dB{{sub| TP}} : dB(true peak) – [[peak amplitude]] of a signal compared with the maximum which a device can handle before clipping occurs.
; dB{{sub| u}} or dB{{sub| v}} : RMS voltage relative to <math>\ \sqrt{0.6\; }\ \mathsf{V}\ \approx 0.7746\ \mathsf{V}\ \approx -2.218\ \mathsf{dB_V} ~.</math>
; dB{{sub| u0s}} : Defined by ''Recommendation ITU-R V.574''.
; dB{{sub| uV}} : see dB{{sub| μV}}
; dB{{sub| uV/m}} : see dB{{sub| μV/m}}
; dB{{sub| v}} : see dB{{sub| u}}
; dB{{sub| V}} : dB(V<sub>RMS</sub>) – voltage relative to 1 volt, regardless of impedance.
; dB{{sub| VU}} : dB(VU) dB [[volume unit]]
; dB{{sub| W}} : dB(W) – power relative to 1&nbsp;[[watt]].
; dB{{sub| W·m⁻²·Hz⁻¹}} : [[Jansky#dBW·m−2·Hz−1|spectral density]] relative to 1 W·m⁻²·Hz⁻¹<ref>{{cite web |title=Units and calculations |website=iucaf.org |url=http://www.iucaf.org/sschool/mike/Units_and_Calculations.ppt |last1=Davis |first1=Mike |format=PPT |date=June 2002 |access-date=2025-03-12 |url-status=live |archive-url=https://web.archive.org/web/20160303223821/http://www.iucaf.org/sschool/mike/Units_and_Calculations.ppt |archive-date=2016-03-03 }}</ref>
; [[DBZ (meteorology)|dB{{sub| Z}}]] : dB(Z) – decibel relative to Z&nbsp;= 1&nbsp;mm<sup>6</sup>⋅m<sup>−3</sup>
; dB{{sub| μ}} : see dB{{sub| μV/m}}
; dB{{sub| μV}} or dB{{sub| uV}} : dB(μV<sub>RMS</sub>) – voltage relative to 1&nbsp;root mean square microvolt.
; dB{{sub| μV/m }}, dB{{sub| uV/m }}, or dB{{sub| μ }} : dB(μV/m) – [[electric field strength]] relative to 1&nbsp;[[microvolt]] per [[meter]].

==== Suffixes preceded by a space ====
; dB HL : dB hearing level is used in [[audiogram]]s as a measure of hearing loss. 
; dB Q : sometimes used to denote weighted noise level
; dB SIL : dB [[sound intensity level]] – relative to 10<sup>−12</sup>&nbsp;W/m<sup>2</sup> 
; dB SPL : dB SPL (sound pressure level) – for sound in air and other gases, relative to 20&nbsp;μPa in air or 1&nbsp;μPa in water
; dB SWL : dB [[sound power level]] – relative to 10<sup>−12</sup>&nbsp;W.

==== Suffixes within parentheses ====
; [[dB(A)]], [[dB(B)]], [[dB(C)]], [[dB(D)]], [[dB(G)]],<!-- possibly also dB(M), but I haven't seen this in practise yet --> and [[dB(Z)]] : These symbols are often used to denote the use of different [[weighting filter]]s, used to approximate the human ear's [[Stimulus (psychology)|response]] to sound, although the measurement is still in dB (SPL). These measurements usually refer to noise and its effects on humans and other animals, and they are widely used in industry while discussing noise control issues, regulations and environmental standards. Other variations that may be seen are dB<sub>A</sub> or dBA.

==== Other suffixes ====
; dB{{sub| Hz}} or dB-Hz : dB(Hz) – bandwidth relative to one [[Hertz (unit)|Hertz]]
;  dB{{sub| K⁻¹}} or dB{{sub| /K}} : dB(K⁻¹) – decibels relative to [[multiplicative inverse|reciprocal]] of [[kelvin]]
; dB{{sub| m⁻¹}} : dB(m⁻¹) – decibel relative to reciprocal of meter: measure of the [[antenna factor]]

; mB{{sub| m}} : {{anchor|Millibel}} mB(mW) – power relative to 1&nbsp;[[milliwatt]], in millibels (one hundredth of a decibel). 100&nbsp;mB{{sub| m}} = 1&nbsp;dB{{sub| m }}. This unit is in the Wi-Fi drivers of the [[Linux]] kernel<ref>{{cite web |title=Setting {{sc|TX}} power |series=en:users:documentation:iw |website=wireless.kernel.org |url=http://wireless.kernel.org/en/users/Documentation/iw#Setting_TX_power }}</ref> and the regulatory domain sections.<ref>{{cite web |title=Is your Wi Fi ap missing channels&nbsp;12 and 13&nbsp;? |date=16 May 2013 |website=Pentura Labs |via=wordpress.com  |url=http://penturalabs.wordpress.com/2013/05/16/is-your-wifi-ap-missing-channels-12-13/ }}</ref>