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SOUNDS IN THE SILENT DEEP HYDROPHONES UNDERWATER SOUND DOCUMENTARY 25434 

PeriscopeFilm
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Also released in slightly different form as "Voice of the Deep". this vintage Moody Institute of Science film explores the nature of sound in the deep sea. The film charts the early use of undersea hydrophones to listen to sounds beneath the sea, and the invention of sonar at the 6:00 mark. At 6:17, hydrophones at Chesapeake Bay are shown in 1942, used for national defense, detecting croaker fish. At 7:58, Moody Science explorers are seen getting into a deep sea diving suit to record the first ever underwater sound motion picture. At 10:00, the University of Rhode Island's Narragansett Marine Laboratory is seen, cataloging hundreds of sounds made by different species using a spectrograph. At 13:40, dolphins are seen performing at Marineland, and a study shown of a dolphin's ability to distinguish items underwater is made using sonar. At 20:30, humpback whales are seen producing underwater calls. At 22:54, a Nagra or similar tape recorder is seen being used in the field to record underwater sound in the arctic.
In its conclusion, the film examines a whole series of conclusions that were wrong in "matters of life and death importance".
The Moody Institute of Science (MIS) was founded in 1945 by the Moody Bible Institute and Irwin A. Moon as an evangelical group that used science demonstrations to preach to the masses. A California pastor who had been using science experiments in his sermons since the early 1930s, Moon believed that the marvels of science provided visible evidence of a divine plan of creation. In the late 1940s, MIS-with Moon as their director-began producing a series of technologically innovative, often riveting, and always religiously motivated science and social studies films. These films provided a religious interpretation for science, offering their viewers-in the church as well as in the American military, the public school system, and industry-a glimpse of a natural world so complex that it could only be explained, according to the films' narrators, through the existence of a higher power or an intelligent designer. By 1956, these Creationist science films were used in 389 school systems in 46 states.
The Moody Institute of Science was a production company for pro-creationism and anti-science media, spun off from the fundamentalist Moody Bible Institute. Its successor is Discovery Media. Moody's role in the history of creationism is underappreciated
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This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit www.PeriscopeFi...

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16 окт 2024

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Комментарии : 17   
@towedarray7217
@towedarray7217 6 лет назад
The sound of the deep ocean terrifies me. Actually, the simple knowledge that we have microphones, some as tall as terrestrial radio antennas, at the bottom of the ocean terrifies me almost as much. Just knowing it's there, with cables and harnesses and anchors and shipwrecks and god knows what else, just lurking at the unreachable dark depths below. Yikes. Thanks PeriscopeFilm for another classic.
@jochisfx
@jochisfx 3 года назад
I'm not sure if you have a real phobia or a just a morbid interest of the things lurking in the deep. Either way you should try the game SOMA.
@brodyuriel1142
@brodyuriel1142 3 года назад
i realize Im kinda randomly asking but does anyone know a good site to watch newly released movies online?
@turnereverett2363
@turnereverett2363 3 года назад
@Brody Uriel i use Flixzone. Just search on google for it =)
@Summitic
@Summitic 3 года назад
This is great!
@rhoshondawalker6981
@rhoshondawalker6981 6 лет назад
This is amazingggg! Our Earth is so complex and so much to learn.
@ricardoalonzo8404
@ricardoalonzo8404 7 лет назад
Holy shit, this is gold
@Summitic
@Summitic 3 года назад
Can you add some documentaries like this one?
@willb3698
@willb3698 7 лет назад
1:56. Well now, I wonder if John Williams came across this when he was working on the Jaws Sound Track :D Anyway - this is incredible, thanks Periscope...Again.
@nicolaslautarovalese6723
@nicolaslautarovalese6723 7 лет назад
Hi, I am a sound engineering student at Argentina. Lately I've been working on hydrophone designs for cetaceans sounds. I used 160kHz piezoelectric crystals and achieved an acceptable result for Narrow Band Ultrasonic Frequency clicks emitted by dolphines. However, I had a poor response in audible frequencies. If I want to use a hydrophone for audible frequencies, should I use crystals with a resonant frequency bellow, within or above the range of interest??? Why???
@willb3698
@willb3698 7 лет назад
Very interesting - let us know which way you went with it. Sorry I am unfamiliar with piezo responses. If you look at the high frequency of the Dolphins (way above 160khz) - then it would suggest that going lower than the target might be good. But as I say I am not knowledgeable in this. You could also amplify your signal before the recorder with a small headphone amp (search for Fiio Amp): www.headphone.com/collections/headphone-amps/products/fiio-a3-portable-headphone-amp or this www.h-instruments.com/Hydrophone_Amplifier/p484050_17280806.aspx There are some cheaper ones out there but fiio are very good. At least you will have a hot signal going in - which may reveal more.
@scubalaxskim44
@scubalaxskim44 6 лет назад
You want a flat frequency response over your whole band of interest (50 Hz - 20 kHz for audio). Resonance is very specific (narrowband). Because your resonance is in ultrasound, you probably can use the same hydrophone for broadband audio. Your problem may be in filters/preamps.
@welshpete12
@welshpete12 5 лет назад
Interesting thank you for posting . :-) @Alexander Challis
@steveedward5074
@steveedward5074 2 года назад
You don't think so much about what sounds are in the ocean. There are maybe more sounds under the ocean than above?
@fredomordaunt3925
@fredomordaunt3925 6 лет назад
Nice Documentary, but hey, at minute 26 when a human is pictured and talking, the sound sync is way, way off more than 5 seconds. Periscope Films you need to re-do the sound and match it to the picture better. Learned something with dolphins and air bladders of fish.
@PeriscopeFilm
@PeriscopeFilm 6 лет назад
LOL Apparently we have a test print of this film -- and yes it is way out of sync at that point!
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