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A 1973 report cites a university study of fifty cases of people complaining about a "low throbbing background noise" that others were unable to hear. The sound, always peaking between 30 and 40 Hz (hertz), was found to only be heard during cool weather with a light breeze, and often early in the morning. These noises were often confined to a 10 ...
Noise from traffic, in particular, is considered by the World Health Organization to be one of the worst environmental stressors for humans, second only to air pollution. [2] Elevated workplace or environmental noise can cause hearing impairment, tinnitus, hypertension, ischemic heart disease, annoyance, and sleep disturbance.
Electromagnetically induced acoustic noise (and vibration), electromagnetically excited acoustic noise, or more commonly known as coil whine, is audible sound directly produced by materials vibrating under the excitation of electromagnetic forces.
Pro tip: Give the bobcat space and back away slowly
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Deadliest animals as of 2016 [1]. This is a list of the deadliest animals to humans worldwide, measured by the number of humans killed per year. Different lists have varying criteria and definitions, so lists from different sources disagree and can be contentious.
Until 2024, there was only one human case in the U.S. In just a few months, the number jumped to 67, with one death. Most of those cases were workers at dairy operations and poultry farms.
Because of their small size, domesticated house cats pose little physical danger to adult humans. However, in the US cats inflict about 400,000 bites per year that result in emergency room visits, at least 10% of which are bites from cats that were unprovoked. [23] This number represents about one in ten of all animal bites. [23]