Acoustic control was carried out in the T1.2 family, in which queen cells were deleted, and in which the worker bees started to lay unfertilized eggs. The result was expected. The activity level is very low, although it is present. Brood control in the daytime showed the presence of brood care equal in power to other work in the hive. The center of the graph is near zero. This speaks of weak in strength, but constantly present signals of brood care, which in this situation is scattered over all frames and requires heating and ventilation ... This fully confirms what is written in the book ( Manual) about signals of brood care ...