1 Pixel density: Pixel density-The pixel density of a display represents the number of pixels over an area of one inch. 2  Itâs measured in âpixels per inchâ, or ppi.
Eustachian Tube Dysfunction can be caused by large adenoids, allergies, or a cold. This dysfunction can cause crackling or popping noises in our ears. The tube is lined with moist mucosa, and inflamed Eustachian tubes often get sticky, which causes the crackling and popping noises when the tubes are moving around. If the inflammation is serious, it can be easily treated with steroid nasal sprays.
Tinnitus can occur in the inner ear, middle ear or even the outer ear. For some people in addition to loud noise, they can get ear pain and difficulty in sleeping due to stress. Frequent loud noise can cause anxiety or depression and difficulty in concentration. What Causes Ringing In The Ears :