Abstract
A field observation was performed in a reed field, measuring vibration of a reed, air velocity fluctuation, Reynolds stress, temperature fluctuation, etc. It was found that the honami occurs simultaneously with large vertical Reynolds stress peaks, which confirms that the honami is induced by organized vortices generated by a shear instability of flow. Measured vibration spectrum of a reed has a peak corresponding to the frequency of honami, and it attenuates rapidly in the high frequency area. A spectral response function is derived based on a vibration equation regarding live reed. The predicted profile of spectrum for reed vibration agrees very well with the result of measured one.
