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  2. Water microphone - Wikipedia

    en.wikipedia.org/wiki/Water_microphone

    A water microphone or water transmitter is based on Ohm's law that current in a wire varies inversely with the resistance of the circuit. The sound waves from a human voice cause a diaphragm to vibrate which causes a needle or rod to vibrate up and down in water that has been made conductive by a small amount of acid.

  3. GoPro - Wikipedia

    en.wikipedia.org/wiki/GoPro

    The first GoPro Hero, a film camera encased in a waterproof shell. The company was founded by Nick Woodman in 2002. [10] He was motivated by a 2002 surfing trip to Australia, in which he was hoping to capture high-quality action photos but could not because amateur photographers could not get close enough or buy appropriate quality equipment at reasonable prices. [11]

  4. Hydrophone - Wikipedia

    en.wikipedia.org/wiki/Hydrophone

    A hydrophone (Ancient Greek: ὕδωρ + φωνή, lit. 'water + sound') is a microphone designed for underwater use, for recording or listening to underwater sound. Most hydrophones contains a piezoelectric transducer that generates an electric potential when subjected to a pressure change, such as a sound wave.

  5. List of 4K video recording devices - Wikipedia

    en.wikipedia.org/wiki/List_of_4K_video_recording...

    GoPro HERO3+ Black Edition (slim) - , 4K (15 fps) and DCI 4K (12 fps), fixed "Ultra Wide" field of view; GoPro HERO4 (2015) - 4k at up to 30fps (black edition) GoPro HERO5 (2016) - 4k at up to 30fps (black edition) and added a USB-C Port and Touchscreen; GoPro HERO6 (2017) - 4k at up to 60fps (black edition) and improved EIS (Electronic Image ...

  6. Who was he? How did he get there? Wetsuit may hold key to ...

    www.aol.com/did-wetsuit-may-hold-key-142928045.html

    An autopsy later established that the body was that of a White man aged between 30 and 60 years old, about 6 feet (1.8 meters) tall, wearing a wetsuit, and had been in the water for up to 12 weeks.

  7. Mexico president to Google: Wrong to accept Trump's Gulf of ...

    www.aol.com/news/mexico-president-google-wrong...

    Sheinbaum presented a letter addressed to Google in which her government argues the U.S. cannot unilaterally change the name of a body of water which it shares with Cuba and Mexico.

  8. Microphone - Wikipedia

    en.wikipedia.org/wiki/Microphone

    A microphone, colloquially called a mic (/ m aɪ k /), [1] or mike, [a] is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones , hearing aids , public address systems for concert halls and public events, motion picture production, live and recorded audio engineering , sound ...

  9. Trump administration explores bringing USAID under State ...

    www.aol.com/news/trump-administration-explores...

    WASHINGTON (Reuters) -The Trump administration is moving to strip a slimmed-down U.S. Agency for International Development of its independence and put it under State Department control, two ...

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