
As mentioned earlier, investing in quality sleep is one of the safest and and most durable health strategy.
Smooth, familiar and repetitive sounds produce drowsiness and sleep. Conversely, the lack of these tend to produce alertness and wakefulness.
Research shows sounds which effect a individual are dependent upon his environment. A city dweller may sleep with the steady rumble of traffic but he might find the sound of crickets to be too noisy. Someone who lives in the countryside might respond better to sounds of leaves stirred by gentle wind.