complex surface impedance

См. также в других словарях:

• Complex Programmable Logic Device — Circuit logique programmable FPGA de Xilinx (modèle Spartan XC3S400) avec 400 000 portes et une fréquence de 50 MHz Un circuit logique programmable, ou réseau logique programmable, est un circuit intégré logique qui peut être… …   Wikipédia en Français

• Acoustic impedance — The acoustic impedance Z (or sound impedance) is a frequency f dependent parameter and is very useful, for example, for describing the behaviour of musical wind instruments. Mathematically, it is the sound pressure p divided by the particle… …   Wikipedia

• acoustic impedance — Acoustics. the total reaction of a medium to the transmission of sound through it, expressed as the ratio of sound pressure to particle velocity at a given point in the medium. * * * ▪ physics       absorption of sound in a medium, equal to the… …   Universalium

• acoustic impedance — /əˌkustɪk ɪmˈpidns/ (say uh.koohstik im peedns) noun the complex ratio of sound pressure to the rate of volume displacement of the surface producing the sound …  

• Quartz crystal microbalance — A quartz crystal microbalance (QCM) measures a mass per unit area by measuring the change in frequency of a quartz crystal resonator. The resonance is disturbed by the addition or removal of a small mass due to oxide growth/decay or film… …   Wikipedia

• Loudspeaker — For other uses, see Loudspeaker (disambiguation). An inexpensive, low fidelity 3½ inch speaker, typically found in small radios …   Wikipedia

• Metal-mesh optical filters — are optical filters made from stacks of metal meshes and dielectric. They are used as part of an optical path to filter the incoming light to allow frequencies of interest to pass while reflecting other frequencies of light. Metal mesh filters… …   Wikipedia

• Radar cross section — (RCS) is a measure of how detectable an object is with a radar. For example a stealth aircraft (which is designed to be undetectable) will have design features that give it a low RCS, as opposed to a passenger airliner that will have a high… …   Wikipedia

• Electric effective resistance — is the parameter of a passive two pole electric circuit or its element, which is equal to the relation of the effective power, which is absorbing in this element, to the square of the effective value of an electric current in it. Electric… …   Wikipedia

• electricity — /i lek tris i tee, ee lek /, n. 1. See electric charge. 2. See electric current. 3. the science dealing with electric charges and currents. 4. a state or feeling of excitement, anticipation, tension, etc. [1640 50; ELECTRIC + ITY] * * *… …   Universalium

• ear, human — ▪ anatomy Introduction       organ of hearing and equilibrium that detects and analyzes noises by transduction (or the conversion of sound waves into electrochemical impulses) and maintains the sense of balance (equilibrium).  The human ear, like …   Universalium