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2. Air Motion Transformer - Wikipedia

   en.wikipedia.org/wiki/Air_Motion_Transformer

   The Air Motion Transformer (AMT) is a type of electroacoustic transducer. Invented by Oskar Heil (1908–1994), it operates on a different transduction principle from other loudspeaker designs, such as moving coil , planar magnetic or electrostatically -driven loudspeakers, and should not be confused with planar or true ribbon loudspeakers .

3. Ultra-short baseline acoustic positioning system - Wikipedia

   en.wikipedia.org/wiki/Ultra-short_baseline...

   Angles are measured by the transceiver, which contains an array of transducers. The transceiver head normally contains three or more transducers separated by a baseline of 10 cm or less, hence the "short baseline" name. A method called “phase-differencing” within this transducer array is used to calculate the direction to the subsea ...

4. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Transducer technologies employed much less commonly for headphones include the Heil Air Motion Transformer (AMT); Piezoelectric film; Ribbon planar magnetic; Magnetostriction and Plasma or Ionic. The first Heil AMT headphone was marketed by ESS Laboratories and was essentially an ESS AMT tweeter from one of the company's speakers being driven ...

5. Underwater acoustic positioning system - Wikipedia

   en.wikipedia.org/wiki/Underwater_acoustic...

   Also, the multiple sensors needed for the USBL transducer pole position and orientation compensation each introduce additional errors. Finally, the non-uniformity of the underwater acoustic environment cause signal refractions and reflections that have a greater impact on USBL positioning than is the case for the LBL geometry.

6. Electrodynamic speaker driver - Wikipedia

   en.wikipedia.org/wiki/Electrodynamic_speaker_driver

   For instance, the shape of the pole piece affects the magnetic interaction between the voice coil and the magnetic field, and is sometimes used to modify a driver's behavior. A shorting ring, or Faraday loop, may be included as a thin copper cap fitted over the pole tip or as a heavy ring situated within the magnet-pole cavity. The benefits of ...

7. Electromagnetic acoustic transducer - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_acoustic...

   An electromagnetic acoustic transducer (EMAT) is a transducer for non-contact acoustic wave generation and reception in conducting materials. Its effect is based on electromagnetic mechanisms, which do not need direct coupling with the surface of the material.

8. Trump sides with Elon Musk in H-1B visa debate, says he's ...

   www.aol.com/news/elon-musk-vows-war-over...

   WEST PALM BEACH, Florida (Reuters) -President-elect Donald Trump on Saturday sided with key supporter and billionaire tech CEO Elon Musk in a public dispute over the use of the H-1B visa, saying ...

9. Bombardier ALP-45DP - Wikipedia

   en.wikipedia.org/wiki/Bombardier_ALP-45DP

   The first unit, AMT 1350, arrived in Montreal on June 9, 2011, after being shipped to Newark and then moving north to its new home. [ 38 ] The locomotives originally ran in electric mode along the entirety of the Deux-Montagnes line and along the Mascouche line between Montreal Central Station and Ahuntsic station .