What Frequencies Can Be Heard? September 2, 2006Posted by healthyself in Blogroll, Cell phone safety, EMF's, high voltage transmission lines, Electromagnetic pollution, nerves, Electrosensitivity, EMF Research, EMR, sensations, pressure, neurons, Medical Research, Microwave exposure, Emergency Medicine, Electrosmog, High Frequencies, Risk Factor, Biological Activity, Vibration, Waves, Noise, Communication, 50 Hz, transmission, Electromagnetic waves, Ear, Animal Research, Low Frequencies, 20 Hz, 20, 000 Hz, 45, 45 Hz, 85, 200, 5 Hz, 10, 10000 Hz, 20000 Hz, 45000 Hz, 85000 Hz, 120000 Hz, 200000 Hz, Sound, 15102 Hz, 16000 Hz, 16961 Hz, 17959 Hz.
..”the human ear is capable of detecting sound waves with a wide range of frequencies, ranging between approximately 20 Hz to 20 000 Hz. Any sound with a frequency below the audible range of hearing (i.e., less than 20 Hz) is known as an infrasound and any sound with a frequency above the audible range of hearing (i.e., more than 20 000 Hz) is known as an ultrasound. Humans are not alone in their ability to detect a wide range of frequencies. Dogs can detect frequencies as low as approximately 50 Hz and as high as 45 000 Hz. Cats can detect frequencies as low as approximately 45 Hz and as high as 85 000 Hz. Bats, who are essentially blind and must rely on sound echolocation for navigation and hunting, can detect frequencies as high as 120 000 Hz. Dolphins can detect frequencies as high as 200 000 Hz. While dogs, cats, bats, and dolphins have an unusual ability to detect ultrasound, an elephant possesses the unusual ability to detect infrasound, having an audible range from approximately 5 Hz to approximately 10 000 Hz.”