Denmark in UK on X: "Like your music loud? Next time you turn on your speaker, give a thought to #Danish Peter Laurits Jensen who invented the loudspeaker in 1915! Today, speakers
Kia Silverbrook, an Australian inventor who owns more than 4,000 patents, was in Singapore to speak at the Distinguished Technopreneur Speaker (DTS) Forum at the Biopolis, 13 September 2012. He had earlier
World's First Loudspeaker. 1921 - YouTube
Inventor 2019 Tutorial 7 Thiet ke loa thung Barrel speaker design - YouTube
Music Thing: Bob Heil, all-round inventor dude, honoured