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.
This branches out to more problems like inflammation, decreased hearing, sometimes a feeling if fullness in the ears and also pain. Having such inflammation is caused by the increase of blood flow in the area. Having high levels of blood flow makes you hear that pulsating sound in your ears. There have been cases wherein patients with high blood pressure claim to have pulsatile tinnitus right after they began taking blood pressure medication. The pulsating sound subsided mostly after a few weeks.