BBC - Sound Waves: The Symphony of Physics (2017)
BBC - Sound Waves: The Symphony of Physics (2017)
HDTV | 1280 x 720 | .MP4/AVC @ 1724 Kbps | 2x~59mn | 1.49 GB
Audio: English AAC 161 Kbps, 2 channels | Subs: English
Genre: Documentary, Science, Nature
HDTV | 1280 x 720 | .MP4/AVC @ 1724 Kbps | 2x~59mn | 1.49 GB
Audio: English AAC 161 Kbps, 2 channels | Subs: English
Genre: Documentary, Science, Nature
Dr Helen Czerski investigates the extraordinary science behind the sounds we're familiar with and the sounds that we normally can't hear
Part 1: Making Sound
At the Palace of Westminster, Helen teams up with scientists from the University of Leicester to carry out state-of-the-art measurements using lasers to reveal how the most famous bell in the world - Big Ben - vibrates to create pressure waves in the air at particular frequencies. This is how Big Ben produces its distinct sound. It's the first time that these laser measurements have been done on Big Ben. At the summit of Stromboli, one of Europe's most active volcanoes, Helen and volcanologist Dr Jeffrey Johnson use a special microphone to record the extraordinary deep tone produced by the volcano as it explodes. Finally, at the University of Cambridge's Institute of Astronomy, Helen meets a scientist who has discovered evidence of sound waves in space, created by a giant black hole. These sounds are one million billion times lower than the limit of human hearing
Part 2: Using Sound
Visiting a hidden location buried beneath the hills of Scotland, Helen experiences some of the most extreme acoustics in the world. Here she learns just how much information can be carried by sound. She discovers how sound has driven the evolution of truly incredible biological systems and complex relationships between creatures that exploit sound for hunting - and escaping from predators. Helen demonstrates how sound waves diffract (bend around objects) and in doing so help us sense danger and locate it. Helen explains how we are not limited to passively detecting sound waves; we can also use them to actively probe the world. From detecting submarines to uncovering the secrets of our planet.
General
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Tagged date : UTC 2017-03-12 15:31:20
Complete name : BBC.Sound.Waves.The.Symphony.Of.Physics.1of2.Making.Sound.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 798 MiB
Duration : 59mn 4s
Overall bit rate mode : Variable
Overall bit rate : 1 888 Kbps
Encoded date : UTC 2017-03-12 15:31:06
Tagged date : UTC 2017-03-12 15:31:06
Writing application : My MP4Box GUI 0.6.0.6
Video
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Scan type : Progressive
Bits/(Pixel*Frame) : 0.075
Stream size : 728 MiB (91%)
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Duration : 59mn 4s
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Channel(s) : 2 channels
Channel positions : Front: L R
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Compression mode : Lossy
Stream size : 67.8 MiB (9%)
Title : BBC.Sound.Waves.The.Symphony.Of.Physics.1of2.Making.Sound.720p.HDTV.x264.AAC.
Encoded date : UTC 2017-03-12 15:31:14
Tagged date : UTC 2017-03-12 15:31:20
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Title : BBC.Sound.Waves.The.Symphony.Of.Physics.1of2.Making.Sound.720p.HDTV.x264.AAC
Encoded date : UTC 2017-03-12 15:31:20
Tagged date : UTC 2017-03-12 15:31:20
Screenshots
BBC - Sound Waves: The Symphony of Physics (2017)
BBC - Sound Waves: The Symphony of Physics (2017)
BBC - Sound Waves: The Symphony of Physics (2017)
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