| Sense | Absolute Threshold |
|---|---|
| Vision | A candle flame seen from 30 miles away on a clear, dark night |
| Hearing | The tick of a watch at 20 feet |
| Taste | One teaspoon of sugar in two gallons of water |
| Smell | One drop of perfume throughout a three-room apartment |
| Touch | A bee’s wing falling on your cheek from a height of about half an inch |