An ex-captain of the Salem militia is infuriated by the increase of crime on the streets â HIS streets! Although the Vigilante was fired for his violent and rash methods of war, he still has a strong sense of justice, or so he tells himself. As the death toll in the Town rises, his anger only grows as he finds the killer's identity obvious.
Dogs hear at a wider range of frequencies than humans.The low end of the range is similar: 67 Hz, but dogs hear noises up to 45 kHz, while humans only hear sounds up to about 23 kHz. This means that they could be hearing and responding to sounds that we can't hear at all.
There are still plenty of sounds in the world that you canât detect. The low range of human hearing starts around 20 hertz, and tops out at about 20,000 [PDF]. By contrast, bats can hear ultrasonic sounds with frequencies up to 110,000 hertz. Other animals, like elephants, hear sounds many times lower than those a human can perceive. And as people age, their hearing gets even worse, eliminating even more sounds from the range of audible noises. Here are just a few sounds most people are missing out on: