If a rat dies near a steam pipe, the body wonât dry and the smell can be horrible for weeks. The odor from a dead mouse may last only a day or two. In fact, there may be no noticeable odor from a single dead mouse but several dead mice in the same area could smell for a few days.
Another source of crackling to look at, is the aluminum foil on the amps. This foil is supposed to shield RF and other extraneous noise. But most times all it does is cause unwanted noises. The foil does not make good contact with the chassis and will cause crackling that can come and go. Loose components can also cause some crackling or even the signal dropping out. Some components to look at are pots, jacks, transformers and mechanically connected grounds.
The most common cause of crepitus is rough cartilage and bone rubbing together in a joint, and the most common cause of this type of crepitus is arthritis or joint injury. Another common cause of crepitus is when air gets inside soft tissues, which can cause a crackling or popping sound when pressed.