BEETHOVEN: The man behind the notes.
Beethoven's musical output has traditionally been divided into three periods, a classification that dates to the first years after the composer's death in 1827 and was formalised with the publication of Wilhelm von Lenz's influential work Beethoven et ses trois styles (Beethoven and his Three Styles). Lenz proposed that Beethoven's creative output be marked by three periods of distinct stylistic personality and he identified specific compositions as milestones for each period.
Deaf Genius
Beethoven is reported to have dated his hearing loss from a fit he suffered 1798 induced by a rage at the interruption of his work; having fallen over, he got up to find himself deaf. His hearing only ever partially recovered and, during its gradual decline, was impeded by a severe form of tinnitus. As early as 1801, he wrote to friends describing his symptoms and the difficulties they caused in both professional and social settings (although it is likely some of his close friends were already aware of the problems).