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  2. Lavalier microphone - Wikipedia

    en.wikipedia.org/wiki/Lavalier_microphone

    A lavalier microphone mounted on a T-shirt. A lavalier microphone or lavalier (also known as a lav, lapel mic, clip mic, body mic, collar mic, neck mic or personal mic) is a small microphone used for television, theater, and public speaking applications to allow hands-free operation.

  3. ClassDojo - Wikipedia

    en.wikipedia.org/wiki/ClassDojo

    ClassDojo [3] is an educational technology company. [4] [5] It connects primary school teachers, students and families through communication features, such as a feed for photos and videos from the school day, [6] [7] and messaging that can be translated into more than 35 languages.

  4. Wireless microphone - Wikipedia

    en.wikipedia.org/wiki/Wireless_microphone

    A wireless microphone, or cordless microphone, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone , it has a small, battery-powered radio transmitter in the microphone body, which transmits the audio signal from the ...

  5. Parabolic microphone - Wikipedia

    en.wikipedia.org/wiki/Parabolic_microphone

    A parabolic microphone is a microphone that uses a parabolic reflector to collect and focus sound waves onto a transducer, in much the same way that a parabolic antenna (e.g. satellite dish) does with radio waves. Though they lack high fidelity, parabolic microphones have great sensitivity to sounds coming from one direction, along the axis of ...

  6. World Teachers' Day - Wikipedia

    en.wikipedia.org/wiki/World_Teachers'_Day

    The theme of World Teachers' Day 2023 is "The teachers we need for the education we want". Teachers are the heart of education and in many countries are leaving the profession they love, and fewer young people aspire to become one. UNESCO estimates that the world needs over 69 million new teachers by 2030, and the shortage only continues to ...

  7. Lip-ribbon microphone - Wikipedia

    en.wikipedia.org/wiki/Lip-ribbon_microphone

    Lip-ribbon microphones use baffles to create an acoustic labyrinth within the body of the microphone. [1] The microphone's bi-directional polar pattern controls interference; sound from the commentator reaches one side of the ribbon more than the other, whereas sounds from other sources contact both sides of the ribbon (at a difference in phase of 180°) and cancel out. [1]

  8. 4-year-old girl gives unforgettable announcement after ...

    www.aol.com/4-old-girl-gives-unforgettable...

    One 4-year-old girl made the most of her school's Christmas performance this holiday season. In a now-viral video, little Stori stole the show when she took the microphone from her principal and ...

  9. Covert listening device - Wikipedia

    en.wikipedia.org/wiki/Covert_listening_device

    A laser microphone can be used to reconstruct audio from a laser beam shot onto an object in a room, or the glass pane of a window. Researchers have also prototyped a method for reconstructing audio from video of thin objects that can pick up sound vibrations, such as a houseplant or bag of potato chips. [18]