Extensive Vibrational Characterisation and Long-Term Monitoring of Honeybee Dorso-Ventral Abdominal Vibration signals.

However, a pronounced trend can be seen in the amplitude of the signal, and this is further emphasised in Fig. 7 , where it is seen that the amplitude of the mean 2D-FT for each hour increases steadily from midnight, peaks at 2 pm and decreases again until 11 pm.

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