1. When Washingtonâs father Augustine died in 1743, George Washington became a slave owner at the early age of eleven. In his will, Augustine left his son the 280 acre family farm near Fredericksburg, Virginia. In addition, Washington was willed ten slaves.
On the decibel scale, the smallest audible sound (near total silence) is 0 dB. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB. A sound 1,000 times more powerful than near total silence is 30 dB.
While 20 to 20,000Hz forms the absolute borders of the human hearing range, our hearing is most sensitive in the 2000 - 5000 Hz frequency range.As far as loudness is concerned, humans can typically hear starting at 0 dB.itch is measured in Hertz (Hz) and loudness is measured in decibels (dB). For a person with normal hearing, when it comes to pitch the human hearing range starts low at about 20 Hz. Thatâs about the same as the lowest pedal on a pipe organ.