Triangle Spike (*Chipault*) - (French chirurgien 18th century) French surgeon. Settled in San Francisco in the early 1840s, he introduced several new methods in the treatment of fractures and ear diseases. The size of this limb is 2 - 3 inches. In humans, it is located in the tympanic cavity and connected to the auditory ossicle. The function of the eardrum is associated with the transmission of sounds from the internal structures of the hearing aid to the external environment during their perception.