CPU Architecture. The processor (really a short form for microprocessor and also often called the CPU or central processing unit) is the central component of the PC. This vital component is in some way responsible for every single thing the PC does.
A. Stop the tonic water! Quinine gives tonic its distinctive bitter flavor but it can cause tinnitus, especially at high doses. Hopefully the hissing sound will gradually go away once the quinine is out of your system.
Drugs that cause tinnitus may be prescription or over-the-counter medications. Some of them cause actual damage to the ear, resulting in permanent hearing loss and/or tinnitus, but this condition is much less common than temporary tinnitus that will go away. Some of the medications that can cause tinnitus will surprise you: