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.
Muscle spasms: Muscle spasms occurring in or around the ear can cause clicking or popping sounds. Secretory otitis media: This is an accumulation of fluid in the middle ear which can develop from an ear infection. Your ears may feel full and pop when you swallow.