Summary
The band width of a resonant gravitational-wave antenna depends on the ratio Г of the wide-band noise to the narrow-band noise. For Г → 0 the band width becomes infinitely large, even if the coupling parameter between bar and transducer is small.
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References
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Pizzella, G. On the band width of resonant gravitational-wave antennas. Lett. Nuovo Cimento 40, 240–242 (1984). https://doi.org/10.1007/BF02751776
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DOI: https://doi.org/10.1007/BF02751776