Ringdown

Version 1.2.0.0 (175 KB) by M. A. Hopcroft
Ringdown.m determines the resonator frequency and Q from a ringdown measurement.
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Updated 19 Nov 2011

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A "ringdown" experiment records the amplitude of a resonator as it decays under the influence of the damping in the system, without any external input. Ringdown.m analyzes a data set from a resonator ringdown measurement and determines the resonator frequency and Q using different methods. An FFT is used to estimate the resonance frequency, and an exponential fit to the signal envelope is used to determine the Q. Finally, a minimum-search fit to the data set is performed to provide a second estimate of both values.

Cite As

M. A. Hopcroft (2024). Ringdown (https://www.mathworks.com/matlabcentral/fileexchange/27938-ringdown), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2009a
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Acknowledgements

Inspired by: crossing, envelope

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ringdown21/

Version Published Release Notes
1.2.0.0

v2.1: Several important bugfixes and improvements.
1.1.0.0

included example data file
1.0.0.0