1 Costochondritis. 2  In this condition, the cartilage of your rib cage, particularly the cartilage that joins your ribs to your breastbone, becomes inflamed and painful. 3  Sore muscles. 4  Chronic pain syndromes, such as fibromyalgia, can produce persistent muscle-related chest pain. In this condition, the cartilage of your rib cage, particularly the cartilage that joins your ribs to your breastbone, becomes inflamed and painful. 2  Sore muscles. 3  Chronic pain syndromes, such as fibromyalgia, can produce persistent muscle-related chest pain.
For other uses, see Decibel (disambiguation). The decibel (dB) is a logarithmic unit used to express the ratio of two values of a physical quantity. One of these values is often a standard reference value, in which case the decibel is used to express the level of the other value relative to this reference.
Full Definition of DATABASE. : a usually large collection of data organized especially for rapid search and retrieval (as by a computer).