What are the Different Types of Sound Sound can be of different types—soft, loud, pleasant, unpleasant, musical, audible (can be heard), inaudible (cannot be heard), etc. Some sounds may fall into more than one category. For instance, the sound produced when an aeroplane takes off is both loud and unpleasant. The sound produced by a marble cutter, on the other hand, may not be … [Read more...] about What are the Different Types of Sound