For humans, hearing is normally limited to frequencies between about 12 Hz and 20,000 Hz (20 kHz), although these limits are not definite. Here we mention 10 sounds that are in some way or another bizarre and you might not have listened to them before or you might have listened but interpreted differently.
10. First Recording (1860)
Methods and media for sound recording are varied and have undergone significant changes between the first time sound was actually recorded for later playback until now. However American Scientists have found a record even before the Thomas Edison Invention. Thomas Edison wasn’t the first person to record sound. A Frenchman named Edouard-Leon Scott de Martinville actually did it earlier. He invented a device called the phonautograph, and, on April 9, 1860, recorded someone singing the words, “Au clair de la lune, Pierrot repondit.” But he never had any intention of playing it back. He just wanted to study the pattern the sound waves made on a sheet of paper blackened by the smoke of an oil lamp. A group of researchers found some of his old phonautograph papers and used a computer program to play the recording.
9. First recording On a Phonograph (1878)
Download Here: lambert
The phonograph expanded on the principles of the phonoautograph. Perfected by Frank Lambert in 1878, the phonograph was a device with a cylinder covered with an impressionable material such as tin foil, lead, or wax on which a stylus etched grooves. The depth of the grooves made by the stylus corresponded to change in air pressure created by the original sound. The recording could be played back by tracing a needle through the groove and amplifying, through mechanical means, the resulting vibrations.
8. 18000 Hz Sine Wave
Download Here: 18000 Hz Sine Wave
Try hearing this sound. It is called “under 20s” sound as the elder’s can’t perceive it. It is a sine wave at 18,000 Hz (by comparison, a dog whistle sounds at 16,000 – 22,000 HZ – meaning a dog can hear this sound as well). This sound is used by some teenagers as a ring tone on their cellphone so that only they (and others of their age group ofcourse) can tell when the phone is ringing. It is also occasionally used in England to play very loud in areas that authorities don’t want teens to congregate in, as the noise annoys them.
The inner ear of the humans have a functional design to hear sounds in a range of a frequency. Hearing is not merely a function of ears but the oscillation amplitude is conducted to the brain. As people get older they lose the ability to hear higher pitched sounds. As people get older they lose the ability to hear higher pitched sounds – that is the reason that only young people can hear this sound – it is too high for most people over the age of 20.
7. Phantom Melodies
Preview Phantom Melody [Slow]
Some pieces of music consist of high-speed arpeggios or other repeating patterns, which change only subtly. If they’re played fast enough, the brain picks up on the occasional notes that change, and links them together to form a melody. The melody disappears if the piece is played slowly. At the higher speed, the changing notes linger in your perception long enough to be linked into a melody, but at the lower speeds they’re too widely separated.
6. The Blue Whale Sounds
Download Here: Blue Whale Sound
The blue whale is the loudest animal on Earth! This endangered mammal is also the largest animal that ever lived on Earth; it is larger than any of the giant dinosaurs were. The second-loudest animal on Earth is the Howler Monkey that lives in South American rain forests. Blue whales mostly emit very loud, highly structured, repetitive low-frequency rumbling sounds that can travel for many miles underwater. These songs may be used for communicating with other blue whales, especially in order to attract and find mates. hale calls are recorded by hydrophones, underwater detecting and recording devices.
The call of the blue whale reaches levels up to 188 decibels. This extraordinarily loud whistle can be heard for hundreds of miles underwater. Theoretical calculations by Roger Payne and Douglas Webb (from the 1970’s) predicted that the loudest whale sounds might be transmitted across an entire ocean. The blue whale is much louder than a jet, which reaches only 140 decibels! Human shouting is 70 decibels; sounds over 120 decibels are painful to human ears.