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Acoustic mirror
Videos
An acoustic mirror is a passive device used to reflect and focus sound waves. Parabolic acoustic mirrors are widely used in parabolic microphones to pick up sound from great distances, employed in sur
4.5-metre-high (14 ft 9 in) WW1 concrete acoustic mirror near Kilnsea Grange, East Yorkshire, UK. The pipe which held the "collector head" (microphone
4.5-metre-high (14 ft 9 in) WW1 concrete acoustic mirror near Kilnsea Grange, East Yorkshire, UK. The pipe which held the "collector head" (microphone) can be seen in front of the structure.
Acoustic mirrors at RAF Denge
Acoustic mirrors at RAF Denge
A parabolic whispering dish that is part of an installation at Jodrell Bank Observatory
A parabolic whispering dish that is part of an installation at Jodrell Bank Observatory
A pair of smaller acoustic mirrors in a park in Muiderberg
A pair of smaller acoustic mirrors in a park in Muiderberg
Chain Home
Videos
Chain Home, or CH for short, was the codename for the ring of coastal early warning radar stations built by the Royal Air Force before and during the Second World War to detect and track aircraft. Ini
Acoustic mirror
…England, a network of large concrete acoustic mirrors was in the process of being built when the project was cancelled owing to the development of the Chain Home radar system. Some of these mirrors are still standing today. Before World War II and the invention of radar, acoustic mirrors were built as early…
Chain Home at RAF Poling, West Sussex
Chain Home at RAF Poling, West Sussex
Robert Watson-Watt's position with the National Physical Laboratory placed him at the centre of a network of researchers whose knowledge of radio phys
Robert Watson-Watt's position with the National Physical Laboratory placed him at the centre of a network of researchers whose knowledge of radio physics was instrumental to the rapid development of radar.
Stanley Baldwin's 1932 comments on future aerial warfare led to a "feeling of defencelessness and dismay." It was the UK's concern about this issue th
Stanley Baldwin's 1932 comments on future aerial warfare led to a "feeling of defencelessness and dismay." It was the UK's concern about this issue that led to so much support being given to radar development while other countries had a much more lackadaisical approach until the war started.
A 1925 radio magazine photograph of Grindell-Matthews' death ray
A 1925 radio magazine photograph of Grindell-Matthews' death ray