Beethoven was the first full-time composer ever. The continued prosperity of the published music market made him a successful freelance composer.
Mozart was fraught with setbacks along the path of his career. Usually, he would get up at dawn and quickly start creating until 2 p.m. dinner. Beethoven liked to work long hours, allowing his thoughts to develop and flow without interruption. He was introduced to the palace as a genius in 1778. At the age of 12, he became a court organist. In 1789, due to his father's alcoholism, he began to support his family as a court musician. In 1791 he went to Vienna to study with Haydn and became a freelance composer. He later claimed that "he never learned anything from Haydn". It was first publicly performed in Vienna in 1795.
Beethoven suffered from jaundice, but his main pain was deafness. At a young age, there is occasional hearing loss, which later develops into a constant ringing in the ears. Signs of his gradual loss of hearing plunged him into a terrible depression and made him think of suicide. In 1802, in Beethoven's famous Heiligenstadt Testament, he expressed the pain of increasing hearing loss. It was a quasi-legal letter to his two brothers. Cold showers, blister therapy and sharp horns tied to his head made his deafness worse.
To make matters worse, by 1814, Beethoven was almost completely deaf, and his ears kept ringing. For the last decade of his life, he could only communicate with his guests through a dialogue book in which they would write their words to him. Despite his auditory disadvantage, many of his great works were created during his last 10 years of total deafness. (You might think a deaf composer would be as useful as a vertigod aerial worker, but it's not).
Hearing loss prevented him from hearing the piano, so he used a special crutch to press one end against the piano's pronunciation and the other end with his teeth so that he could hear the piano.
Why did crutches allow Beethoven to hear? This is actually bone conduction. More than 30 years ago, scientists discovered the principle of transmitting sound through bones. Sound can be transmitted to the auditory nerve in two ways, one is transmitted to the cochlea through the vibration of the eardrum, then to the auditory ossicles, and then to the auditory nerve. Another way is through the vibration of the skull directly transmitted to the listening ossicles, this way of sound transmission is called "bone conduction".
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