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  2. Sonar - Wikipedia

    en.wikipedia.org/wiki/Sonar

    Sonar may also be used for robot navigation, [5] and sodar (an upward-looking in-air sonar) is used for atmospheric investigations. The term sonar is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low to extremely high . The study of underwater sound is known as ...

  3. Sonar signal processing - Wikipedia

    en.wikipedia.org/wiki/Sonar_signal_processing

    Sonar systems are generally used underwater for range finding and detection. Active sonar emits an acoustic signal, or pulse of sound, into the water. The sound bounces off the target object and returns an echo to the sonar transducer. Unlike active sonar, passive sonar does not emit its own signal, which is an advantage for military vessels.

  4. Acoustic location - Wikipedia

    en.wikipedia.org/wiki/Acoustic_location

    Sonar (sound navigation and ranging) is a technique that uses sound propagation under water (or occasionally in air) to navigate, communicate or to detect other vessels. There are two kinds of sonar – active and passive. A single active sonar can localize in range and bearing as well as measuring radial speed.

  5. Underwater acoustics - Wikipedia

    en.wikipedia.org/wiki/Underwater_acoustics

    Sonar is the name given to the acoustic equivalent of radar. Pulses of sound are used to probe the sea, and the echoes are then processed to extract information about the sea, its boundaries and submerged objects. An alternative use, known as passive sonar, attempts to do the same by listening to the sounds radiated by underwater objects.

  6. Phono-semantic matching - Wikipedia

    en.wikipedia.org/wiki/Phono-semantic_matching

    Phono-semantic matching (PSM) is the incorporation of a word into one language from another, often creating a neologism, where the word's non-native quality is hidden by replacing it with phonetically and semantically similar words or roots from the adopting language.

  7. Flapping - Wikipedia

    en.wikipedia.org/wiki/Flapping

    Flapping or tapping, also known as alveolar flapping, intervocalic flapping, or t-voicing, is a phonological process involving a voiced alveolar tap or flap; it is found in many varieties of English, especially North American, Cardiff, Ulster, Australian and New Zealand English, where the voiceless alveolar stop consonant phoneme /t/ is pronounced as a voiced alveolar flap [ɾ], a sound ...

  8. Here's what English sounds like to non-English speakers - AOL

    www.aol.com/heres-english-sounds-non-english...

    The song is about giving English speakers the experience of hearing what it sounds like without understanding what it means. The video has since racked up almost 9 million views.

  9. Guttural - Wikipedia

    en.wikipedia.org/wiki/Guttural

    Guttural speech sounds are those with a primary place of articulation near the back of the oral cavity, where it is difficult to distinguish a sound's place of articulation and its phonation. In popular usage it is an imprecise term for sounds produced relatively far back in the vocal tract, such as the German ch or the Arabic ayin , but not ...