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A moo box. The moo box or moo can is a toy or a souvenir, also used as a hearing test.When turned upside down, it produces a noise that resembles the mooing of a cow.The toy can be configured to create other animal sounds such as the meow of a cat, the chirp of a bird, or the bleat of a sheep.
Upsweep is an unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays. This sound was present when the Pacific Marine Environmental Laboratory began recording its sound surveillance system, SOSUS, in August 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds in duration each.
The size of the circle is dependent on the size of the test article. Generally, a circle 12 feet (3.7 m) in diameter larger and 4 feet (1.2 m) taller than the test article is required. The arrangement should avoid symmetry to reduce the potential for adverse coupling of plane waves. The test article can be mounted on a platform or suspended.
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They build a sound gun and test it on the alien, causing it to become visible and killing it in the process. They try to inform the government, but their radio is jammed by the aliens, who are apparently nearby. Using a radio direction finder they follow the jamming signal to the alien ship, killing several aliens along the way.
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The Wow! signal represented as "6EQUJ5". The original printout with Ehman's handwritten exclamation is preserved by Ohio History Connection. [1]The Wow! signal was a strong narrowband radio signal detected on August 15, 1977, by Ohio State University's Big Ear radio telescope in the United States, then used to support the search for extraterrestrial intelligence.