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A ghost call or phantom call is a telephone call for which, the recipient of the call answers, however there is no one on the other end of the call. The term is also used in managing IP PBX systems. Ghost calls on the lines that cannot be explained or are some residual output of one Real-time Transport Protocol or RTP stream interacting with ...
A silent call is a telephone call in which the calling party does not speak when the call is answered. Most such calls are generated by a cold call telemarketing operation's dialer software, which makes many calls automatically and sometimes does not have an agent immediately available to handle an answered call.
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.
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The sound of the fire, crackling and popping, struck Borsay as weirdly familiar, like the YouTube yule log video he put on at Christmas. The buildings survived the night. Now, it was time for ...
A sound test is a function built into the options screen of many video games. This function was originally meant to test whether the game's music and sounds would function correctly (hence the name), as well as giving the player the ability to compare samples played in Monaural , Stereophonic and later Surround sound.
Within ghost hunting and parapsychology, electronic voice phenomena (EVP) are sounds found on electronic recordings that are interpreted as spirit voices.Parapsychologist Konstantīns Raudive, who popularized the idea in the 1970s, described EVP as typically brief, usually the length of a word or short phrase.
Anechoic chambers at Apple Inc. campus used to test their mobile device products, via WaybackMachine; Photos from building an anechoic chamber in CTU, Prague; Sound examples The sound of clothes inside an anechoic chamber; Hallucinations in anechoic chambers: the science behind the claim; Listen to a subdued balloon burst in an anechoic chamber