Ordbog
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En referenceordbog med lyd- og vibrationstermer.
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Gain
The increase in level of a signal produced by an amplifier.Gated Analysis
Gated measurements are used on cyclic and repetitive signals from “slowly” rotating machines to extract information about individual events in a cycle. Results are often shown in a waterfall plot with the spectra plotted as a function of crankshaft angle against one or two machine revolutions.Gaussian Window
The Gaussian window has the form 
on a logarithmic scale (dB) and generates an inverted parbola with no side lobes. This provides a smoothing weighting function, which increases the bandwidth.Generalised Co-ordinates
The minimum number of independent co-ordinates necessary to completely describe a systems position constitutes a set of generalised co-ordinates. For an N degree of freedom system, N generalised co-ordinates are required.Graphic Level Recorder
A device for recording signal level in dB versus Time on a tape. The level in dB versus Angle can be recorded also for directivity patterns.Grating, Diffraction
An optical grating consists of minute, parallel lines used to break light down into its component colors. The principle is now used to achieve diffraction of acoustical waves.Grating, Reflection Phase
An acoustical diffraction grating to produce diffusion of sound.Brüel & Kjær Sound & Vibration Dictionary End User Agreement
