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2. List of unexplained sounds - Wikipedia

   en.wikipedia.org/wiki/List_of_unexplained_sounds

   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.

3. NASA offers explanation for bizarre 'trumpet noise' phenomena

   www.aol.com/news/2015-05-22-nasa-attempts-to...

   Videos of eerie noises erupting from the skies have recently surfaced on YouTube, sending people into a panic around the world. The video above shows a particularly frightening episode of this ...

4. The Hum - Wikipedia

   en.wikipedia.org/wiki/The_Hum

   A 1973 report cites a university study of fifty cases of people complaining about a "low throbbing background noise" that others were unable to hear. The sound, always peaking between 30 and 40 Hz (hertz), was found to only be heard during cool weather with a light breeze, and often early in the morning. These noises were often confined to a 10 ...

5. 8 Telltale Signs You Should Replace Your Fridge - AOL

   www.aol.com/8-telltale-signs-replace-fridge...

   Strange or New Sounds Refrigerators make noise, even brand-new ones. They make sounds when the compressor kicks on, when the fans run, and when ice drops from the ice maker.

6. Forest Grove Sound - Wikipedia

   en.wikipedia.org/wiki/Forest_Grove_Sound

   The Forest Grove Sound was an unexplained noise, described by The Oregonian as a "mechanical scream", heard in Forest Grove, Oregon in February 2016. External videos News report by KOIN 6

7. Mysterious high-pitched tone keeps Oregon residents up at night

   www.aol.com/article/2016/02/22/mysterious-high...

   An unexplained high-pitched tone has kept residents of a Portland suburb awake at night for at least a week.

8. Download, install, or uninstall AOL Desktop Gold - AOL Help

   help.aol.com/articles/aol-desktop-downloading...

   Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements. AOL APP News / Email / Weather / Video

9. Personalize your background image, sounds, and toolbar ...

   help.aol.com/articles/personalize-your...

   4. Click the Sounds tab. 5. Click Customize My Sounds. 6. Search for a sound or select a category from the "All" menu at the top-right. 7. Optionally, click the Preview button to play a sound. 8. Click Apply to choose a sound.