Didjeridoo is not the original name. Didjeridu is believed to be an onomatopoeia developed by westerners to describe the sound that it makes.
The Longer the instrument, the lower the note or pitch.
No exact age but argued to be the oldest instrument in existence.
Based on dating of cave paintings in Northern "Oz" (Oz-tralia, Its an Aussie thing) The Aboriginal people have been playing this for at least 1500 years.
In Aboriginal culture they have been playing the Didj since "Dreamtime" which for them is a sacred time and the source of all creation. For Aboriginals, Dreamtime, is circa 50,000 years ago...aka the Paleolithic / Early Stone Age.
Traditional Didgeridus are made out of eucalyptus.
They occur naturally when termites hollow out the main trunk thus leaving the rest of the tree to be harvested.
It can be painted or not and bees wax is placed on the narrower end for the mouthpiece.
When Didjin' out an experienced Didjist can achieve sound levels equivalent to a noisy night club with the level inside the players mouth reaching up to 100 decibels - 10 decibels lower than a jack hammer. Imagine what happens on a nano-anatomical level to any bacteria or virus in your body when you start to play.
The Didg Has profound health and healing aspects, such as:
Reduces snoring and sleep apnea by strengthening the muscles of the upper airway which diminishes their tendency to collapse during sleep.
Promotes good posture.
Facilitates and aids in the digestive process.
Eucalyptus is the traditional medium didjs are made out of, and has anti-septic effects, and is known for boosting the immune system. Often used by dentists as a gargle to prevent infections.
Eucalyptus is also a stimulant and increases cardiac action.
Beeswax is known for producing negative ions which cleanse the air of dust, odor, toxin, pollen, mold, dust mite feces, chemical trace residues and viruses.
Beeswax is proven to be beneficial for people who have allergies, environmental sensitivities, or too much stress in their life.
All of the components independently have beneficial qualities. And it is the art of playing the Didjeridoo that is good for the soul or the "I"ndividual.