Valdemar Poulsen
Danish engineer and inventor of magnetic recording
Danish engineer and inventor of magnetic recording
1942
84 years ago — 73 years old
Scientists & Innovators
Denmark
An engineer developed the magnetic wire recorder, one of the first devices to record sound electrically. Introduced the first practical system for recording and reproducing sound using magnetism. This innovation laid the groundwork for later developments in audio technology. Worked on various inventions, including the Poulsen Arc, used in radio transmission and the development of early sound recording equipment.
Invented the magnetic wire recorder
Developed the Poulsen Arc
Born in 1987, this ice hockey player played as a center in the NHL, primarily for the Washington Capitals. Debuting in the league in 2006, he quickly established himself as a key player for the team. In 2018, he contributed to the Capitals winning their first Stanley Cup. Throughout his career, he displayed exceptional playmaking abilities and became known for his strong offensive performances.
Continue ReadingA businessman and philanthropist born in 1907, established Shaw Brothers Studio, which became a leading production company in the Hong Kong film industry. Expanded into television by founding TVB in 1967, revolutionizing the media landscape in Hong Kong. Played a crucial role in promoting Chinese cinema and television, contributing to cultural exports. His philanthropic efforts focused on education and healthcare, establishing various charitable foundations, including the Shaw Foundation.
Continue ReadingA prominent comedian and musician, contributed to the American entertainment landscape through silent antics and virtuoso harp performances. Gained fame as a member of the Marx Brothers, a comedy troupe that revolutionized film and stage humor during the early 20th century. Starred in classic films such as 'Duck Soup' and 'A Night at the Opera'. Often portrayed a silent character, utilizing slapstick comedy and expressive facial gestures to engage audiences. Excelled in comedy, music, and theatrics, showcasing raw comedic talent and musical prowess.
Continue ReadingRuled Castile and León from 1252 to 1284. Emphasized the importance of education and scholarship in his kingdom. Patronized the translation of various works into Castilian, significantly contributing to the cultural heritage of Spain. Established the laws known as the 'Siete Partidas' which influenced Spanish legal systems. Attempted to extend his reign into the Holy Roman Empire through military campaigns.
Continue ReadingBorn in 1943, a civil rights activist played a significant role during the Freedom Summer of 1964, an initiative aimed at increasing voter registration among African Americans in Mississippi. Participated in organizing voter education and registration drives in a region that faced significant racial discrimination and violence. In June 1964, Goodman, along with two colleagues, was murdered in Mississippi, an event that drew national attention to the civil rights movement and highlighted the dangers faced by activists. The tragic murder was part of a broader pattern of violence against civil rights workers and instigated federal action to enhance protections for voters and activists.
Continue ReadingA prominent trombonist, composer, and conductor, this Dutch musician gained recognition for symphonic compositions, particularly in wind band repertoire. Significant contributions include the concert band piece 'Symphony No. 1, The Lord of the Rings,' which showcased a blending of classical and popular music styles. As a conductor, engagements with various orchestras and wind ensembles further illustrated versatility and expertise. Educational efforts include teaching at numerous institutions, emphasizing the importance of wind music in the contemporary landscape.
Continue Reading