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- W2007244568 abstract "The problem is to measure the phase between two physically related, linear vibration signals on an experimental structure subjected to random forces, distributed in space, on which are superimposed known periodic frequencies. The instantaneous phase for a given frequency is obtained with a special-purpose multichannel analog phase and amplitude analyzer. The results are compared with phase measurements as a function of frequency obtained with a digital estimating method from the crosspower spectral estimates. The phase relationships between the two measurement locations define the longitudinal modal behavior under a wide range of random forcing functions. An analog modelwith five masses, connecting springs, and variable damping is used to simulate the experimental structure. The phase response of comparable measurement locations on the analog model is compared with the experimental results and indicates the magnitude of damping in the experimental structure. The digital estimating technique provides the investigator with useful information on phase relationships between complex acoustical signals related to structural damping, mode coupling, modal response under random forcing functions, and sound fields." @default.
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- W2007244568 date "1964-11-01" @default.
- W2007244568 modified "2023-09-26" @default.
- W2007244568 title "Analog and Digital Analysis Methods for Determining Phase Relationships between Complex Acoustical Signals" @default.
- W2007244568 doi "https://doi.org/10.1121/1.1919325" @default.
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