The sound level of a person talking at 1.0 m of distance is 60 dB. you are surrounded by five people all talking at the same time. 74 dB sound level are you being exposed to
Sound is a kind of energy produced by vibration. When an object vibrates, the air molecules around it move. These molecules collide with nearby molecules and also cause vibrations. This causes them to encounter nearby air molecules. He has two types of noise: audible and inaudible. Inaudible sounds are sounds that the human ear cannot perceive. The human ear can hear frequencies between 20 Hz and 20 kHz. Sounds with frequencies below 20 Hz are called low-frequency sounds. E
In physics, sound is a vibration that propagates as sound waves through a transmission medium such as gas, liquid, or solid. In human physiology and psychology, the sound is the reception and perception by the brain of such waves.
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The Upward Bound Project was developed during the presidency of Lyndon Johnson.
Answer:
they have morphological features found in homo-sapiens
Explanation:
Mesolithic/Archaic (socially complex) hunter-gatherers have cultures and societies that have economic and social traits in which many scholars have thought or assumed required agriculture for them to develop.
In Mesolithic/Archaic (socially complex) hunter-gatherers society they have the following; social ranking, Division of labor, High population densities,elaborate ritual beliefs and so on.
Mesolithic/Archaic (socially complex) hunter-gatherers culture is the culture between Paleolithic and Neolithic/Archaic homspaiens.
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