Unlike the Paleolithic, when more than one human species existed, only one human species (Homo sapiens sapiens) reached the Neolithic. The term Neolithic derives from the Greek Î½ÎµÎ¿Î»Î¹Î¸Î¹ÎºÏÏ, neolithikos, from Î½Î­Î¿Ï neos, new + Î»Î¯Î¸Î¿Ï lithos, stone, literally meaning New Stone Age.
Tinnitus is ringing, buzzing, or other sounds in the ear. Loud noise can also cause other physical problems, such as: 1  High blood pressure. 2  Increased or abnormal heart rate. 3  Upset stomach. 4  Insomnia or difficulty sleeping (even after the noise stops).oise. Loud noise can be very damaging to hearing. Both the level of noise and the length of time you listen to the noise can put you at risk for noise-induced hearing loss. Noise levels are measured in decibels, or dB for short.
The perception of loudness is related to both the sound pressure level (SPL) and duration of a sound. The human auditory system averages the effects of SPL over a 600â1000 ms interval. A sound of constant SPL will be perceived to increase in loudness as samples of duration 20, 50, 100, 200 ms are heard, up to a duration of about 1 second at which point the perception of loudness will stabilize.