ION VOICU was born on October 18, 1923 in Bucharest in a family of musicians. He received his first violin at the age of 5, and he was initiated into the study of this instrument by a student. Gabaret Avakian and Vasile Filip subsequently guided him for the examination admission to the Royal Academy of Music in Bucharest where, at the age of 14 years old, he was directly matriculated in the 5th year.

In 1940 he became member of the Romanian Broadcasting Philharmonic Orchestra, and in 1941 he made his debut  on the stage of the Romanian Athenaeum. At one of his many concerts and recitals that followed, he was noticed by George Enescu, the great composer, who gave him a few lessons in his house in Sinaia.

In 1946, having won the National Prize “Enescu–Menuhin” he went to Switzerland. In 1950 he became the soloist of Philharmonic Orchestra in Bucharest, and in 1955, his wish to deepen his studies made him go to the Conservatory “Piotr Ilici Tchaikovsky” in Moscow where he studied with Iampolski and David Oistrakh. The young violinist's huge potential and his ascent convinced the administration of the Ministry of Culture to get an exceptional instrument and and to place it at his disposal. In 1956, Ion Voicu became the first Romanian who had a Stradivarius violin.

He gave concerts on the greatest stages of the world (Royal Albert Hall and Wigmore Hall in London, Scala in Milan, Carnegie Hall in New York, Teatro Colòn in Buenos Aires, Musikverein and Konzerthaus in Vienna a.s.o.) with the most famous orchestras (Berliner Philarmoniker, London Symphony Orchestra, Gewandhaus in Leipzig, the Philharmonic Orchestra in Tokyo, the Symphony Orchestra in Cincinatti, Seattle, Baltimore, Los Angeles, Dresden, München a.s.o.) and co-operated with eminent musicians: Yehudi Menuhin, Isaac Stern, Henryk Szering, Monique Haas, Christoph Eschenbach, Sergiu Celibidache, John Barbirolli, Antal Dorati, Vàclav Neumann, André Cluytens, a.s.o.

He was a juror in prestigious international violin competitions: “Piotr Ilici Tchaikovsky” (Moscow), “Carl Flesch” (London), “Jan Sibelius” (Helsinki), “Johann Sebastian Bach” (Leipzig) and during his career, he was awarded by many prizes and titles, among which: “Medaille d'or” of the French Academy, the Honorary Diploma of the Foundation “Eugène Ysaye”, The Prize of the Romanian Academy, The Honorary Diploma of the Ministry of Culture and Prize of Excellency of the Union of Interpreters, Choreographers and Musical Critics of Romania.

He was member of the Foundation “Henryk Szering” and of UNICEF Council.