Another quick link to a “vibration” topic, this time on pre-swarming noise. See this New Scientist article entitled: Bee Sensor Picks Up Queen Bee’s Farewell Vibes.
We know that the old Queen will swarm out with half of the hive (the bees’ natural form of reproduction) once the new Queen cell(s) are sealed, about 8 days after the egg(s) are laid and half-way to hatching at 16 days. We keep a beady eye out for the tell-tale queen cells drooping on the comb in May and June.
This article, however, focuses solely on the changes in a hive’s vibrations about 10 days prior to swarming, suggesting that these auditory changes could alert a pitch-perfect beekeeper of imminent swarming, just before a new Queen larva is ready to be sealed in her cell at 8 days (which is the prompt for her mother to swarm out of the hive). So there’s some scientific evidence that, for beekeepers, hearing can be as helpful as vision. Eyes and ears. Don’t leave home without them !