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  2. Noise-canceling microphone - Wikipedia

    en.wikipedia.org/wiki/Noise-canceling_microphone

    The internal electronic circuitry of an active noise-canceling mic attempts to subtract noise signal from the primary microphone. The circuit may employ passive or active noise canceling techniques to filter out the noise, producing an output signal that has a lower noise floor and a higher signal-to-noise ratio .

  3. Voice changer - Wikipedia

    en.wikipedia.org/wiki/Voice_changer

    Voice changer. The term voice changer (also known as voice enhancer) refers to a device which can change the tone or pitch of or add distortion to the user's voice, or a combination and vary greatly in price and sophistication. A kazoo or a didgeridoo can be used as a makeshift voice changer, though it can be difficult to understand what the ...

  4. Laser microphone - Wikipedia

    en.wikipedia.org/wiki/Laser_microphone

    Laser microphone. A laser microphone is a surveillance device that uses a laser beam to detect sound vibrations in a distant object. It can be used to eavesdrop with minimal chance of exposure. The object is typically inside a room where a conversation is taking place and can be anything that can vibrate (for example, a picture on a wall) in ...

  5. Covert listening device - Wikipedia

    en.wikipedia.org/wiki/Covert_listening_device

    A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance, espionage and police investigations. Self-contained electronic covert listening devices came into common use with ...

  6. Auto-Tune - Wikipedia

    en.wikipedia.org/wiki/Auto-Tune

    Website. www .antarestech .com. Auto-Tune, or autotune, is an audio processor software introduced in 1997 by the American company Antares Audio Technologies. [1] [4] It uses a proprietary device to measure and correct pitch in vocal and instrumental music recording and performances.

  7. Latency (audio) - Wikipedia

    en.wikipedia.org/wiki/Latency_(audio)

    Latency refers to a short period of delay (usually measured in milliseconds) between when an audio signal enters a system, and when it emerges. Potential contributors to latency in an audio system include analog-to-digital conversion, buffering, digital signal processing, transmission time, digital-to-analog conversion, and the speed of sound ...

  8. Audio time stretching and pitch scaling - Wikipedia

    en.wikipedia.org/wiki/Audio_time_stretching_and...

    Time stretching is the process of changing the speed or duration of an audio signal without affecting its pitch. Pitch scaling is the opposite: the process of changing the pitch without affecting the speed. Pitch shift is pitch scaling implemented in an effects unit and intended for live performance. Pitch control is a simpler process which ...

  9. Hoarse voice - Wikipedia

    en.wikipedia.org/wiki/Hoarse_voice

    A hoarse voice, also known as dysphonia or hoarseness, [1] is when the voice involuntarily sounds breathy, raspy, or strained, or is softer in volume or lower in pitch. [2] [3] [clarification needed] A hoarse voice can be associated with a feeling of unease or scratchiness in the throat. [2] Hoarseness is often a symptom of problems in the ...

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