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Yes, they are essential nowadays because everything is being handled through the internet.
So a person wears headphones and earphones all the time while working or even while resting.
You can check out its reason and also why it is essential from this link https://www.adventear.com/the-best-boothless-audiometer-on-the-planet-and-beyond/.
A tympanogram shows result of one eardrum at a time. An “L” on the tympanogram indicates the left and “R” indicates the right eardrum.
