This article is about the damping factor of loudspeakers. It is not to be confused with the damping ratio in any damped oscillatory system.
In an audio system, the damping factor is defined as the ratio of the rated impedance of the loudspeaker (usually assumed to be 8 Ω) to the source impedance of the power amplifier.[1][2][3][4][5][6] It was originally proposed in 1941.[7] Only the magnitude of the loudspeaker impedance is used, and the power amplifier output impedance is assumed to be totally resistive.
Comparison of damping factors for a solid state amplifier (Luxman L-509u) and a tube amplifier (Rogue Atlas)
In typical solid state and tube amplifiers, the damping factor varies as a function of frequency. In solid state amplifiers, the damping factor usually has a maximum value at low frequencies, and it reduces progressively at higher frequencies. The figure to the right shows the damping factor of two amplifiers. One is a solid state amplifier (Luxman L-509u) and the other is a tube amplifier (Rogue Atlas). These results are fairly typical of these two types of amplifiers, and they serve to illustrate the fact that tube amplifiers usually have much lower damping factors than modern solid state amplifiers, which is an undesirable characteristic.
^Cite error: The named reference Augspurger 1967 was invoked but never defined (see the help page).
^Cite error: The named reference Toole 1975 was invoked but never defined (see the help page).
^Cite error: The named reference Ballou 1987 was invoked but never defined (see the help page).
^Cite error: The named reference Pierce 2002 was invoked but never defined (see the help page).
^Cite error: The named reference Sinclair 2009 was invoked but never defined (see the help page).
^Cite error: The named reference Duncan 1997 was invoked but never defined (see the help page).
^Cite error: The named reference Langford 1941 was invoked but never defined (see the help page).
In an audio system, the dampingfactor is defined as the ratio of the rated impedance of the loudspeaker (usually assumed to be 8 Ω) to the source impedance...
{1}{Q_{C}}}}}} For a single damped mass-spring system, the Q factor represents the effect of simplified viscous damping or drag, where the damping force or drag force...
In physical systems, damping is the loss of energy of an oscillating system by dissipation. Damping is an influence within or upon an oscillatory system...
will not are overdamped. Damping attenuation (symbol α) is measured in nepers per second. However, the unitless dampingfactor (symbol ζ, zeta) is often...
{mk}}}}} is called the "damping ratio". The value of the damping ratio ζ critically determines the behavior of the system. A damped harmonic oscillator can...
factors, but it is generally assumed that the dampingfactor will be set around 0.85. The dampingfactor is subtracted from 1 (and in some variations of...
amount of damping in a system a ratio called the damping ratio (also known as dampingfactor and % critical damping) is used. This damping ratio is just...
(2nd ed.). Merrill. pp. 243–246. ISBN 978-0-675-08771-1. Retrieved 27 October 2011. Calculation of the DampingFactor and the Damping of Impedance Bridging...
would have a dampingfactor of >32, whereas the same headphone driven with an iPod touch 3G (7 Ω output impedance) would have a dampingfactor of just 4...
Cambridge University Press, ISBN 0-521-31312-0 Calculation of the dampingfactor and the damping of impedance bridging Interconnection of two audio units - Input...
is a damping by diffusion, not of diffusion. The strength of diffusion damping is calculated by a mathematical expression for the dampingfactor, which...
the damping ratio of an underdamped system in the time domain. The method of logarithmic decrement becomes less and less precise as the damping ratio...
Professional Loudspeakers. January 2014. What is Loudspeaker Damping and DampingFactor (DF)? Aiken Amplification. Randall Aiken. What is Negative Feedback...
driver have not been important enough to adjust for. The amplifier dampingfactor, which is the ratio of the nominal load impedance (driver voice coil)...
from five to 20 decibels. Surface damping materials are very effective at reducing structure-borne noise. Passive damping materials have been used since...
stability lobes diagram. The structure stiffness, damping ratio and the machining process dampingfactor, are the main parameters that defines the limit...
The numerical coefficient α {\displaystyle \alpha } is known as a dampingfactor. Usually S is a sparse matrix and for modern directed networks it has...
(S-curve) is used to describe the relation between crop yield and growth factors. The blue figure was made by a sigmoid regression of data measured in farm...
frequency response curve near the corner frequency, determine the damping ratio or dampingfactor (= 1/(2Q)). This also affects the phase response, and the time...
Damp proofing in construction is a type of moisture control applied to building walls and floors to prevent moisture from passing into the interior spaces...
In physics, Landau damping, named after its discoverer, Soviet physicist Lev Davidovich Landau (1908–68), is the effect of damping (exponential decrease...
Frequency response: 10 Hz to 70 kHz Total harmonic distortion: 0.02% Dampingfactor: 55 Input sensitivity: 2.5mV (MM), 150mV (line) Signal to noise ratio:...
Global Information