Hearing test 20,000 Hz

Sounds around 19 hz, matches the resonant frequency of the human eyeball, with reports of apparitions as detailed by the Coventry Telegraph newspaper. The most dangerous frequency is at the median alpha-rhythm frequencies of the brain, 7 hz . This is also the resonant frequency of the body’s organs.

Frequency is measured in hertz (Hz) [hurts]. A low- frequency sound is about 500 Hz or lower. A high- frequency sound is about 2,000 Hz and higher.

Low-frequency hearing loss is defined as an audiometric low-frequency (500 Hz, 1000 Hz and 2000 Hz) pure-tone average greater than 15 dB in one or both ears based on the criteria from the American Speech-Language-Hearing Association (ASHA) guidelines for hearing loss thresholds.

Low-frequency sounds are 500 Hz or lower while high-frequency waves are above 2000 Hz. Human ears can register sounds from about 20 Hz in frequency up to 20,000 Hz, depending of course, upon the hearer. People with hearing loss usually have trouble hearing sounds in the higher frequency range.6 Eki 2017