Circus elephants experience a lot of noise, is that a problem?
Elephants in circuses are usually chained in loud environments with considerable low frequency generator and other machine noise. Generators produce sound at the frequencies at which elephant hearing is most sensitive and also at the frequencies at which elephant themselves communicate. The ability of elephants to detect very low frequency sounds over long distances means that in city environments, during transport in trucks and trains, and in the vicinity of circus generators, elephants are continuously exposed to low frequency machine, vehicle and air traffic noise. The elephants extreme sensitivity to these frequencies means that the loud low frequency noise that circus elephants are subjected to at various urban locations and during transport are neither humane nor healthful.