The human ear can detect sound frequencies from nearly 20-20,000 cycles per second.
A frequency of 1 cycle per second is known as a Hertz (Hz) and is how sound is calculated in noise level measurement consulting. However, studies show that the human ear can detect much lower or higher Hertz depending on age, quality of hearing, and sensitivity to frequencies.
This is why a sound lower than 20Hz ( bass ) can cause you to shake in your seat, or higher than 20,000Hz ( treble ) can cause you pain from listening too intensely for a long time.
Below are the five most interesting facts about sound that will surely surprise you!
Sound is not actually a material object that enters the ear and directly affects the brain. Instead, it has been proven that sound travels through the air as a wave. The ear converts these waves into vibrations that are then sent to the brain.
Even without hearing, your brain can still identify the direction a sound is coming from and the difference between multiple sounds. This was proven by an experiment done in 2007.
Human beings are very dependent on their sense of sound. It is the first warning device they have when danger lurks nearby. The human ear can detect sounds at frequencies that range from 0dB and up into the tens of thousands of cycles per second.
Some sounds are so intense that they can literally kill you. For example, in August of 1997, an opera singer was singing a very high note when people around him fainted, and one person died from the intensity of the sound.
Tectonic plates shifting under land masses and oceans produce a deep, muffled sound that can only be heard using seismographs.