The term 'raucous noise' can be described by two crossword solutions: 'BLARE' (5 letters) and 'BLAT' (4 letters). BLARE is a loud, harsh sound that is usually made by a trumpet or other brass instrument. It is often used to signal an alarm or to announce something important. BLAT, on the other hand, is a loud, sharp sound that is usually made by a machine or vehicle. It is often used to indicate a malfunction or to draw attention to a problem. Both words are commonly used to describe a loud, disruptive noise.