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  2. Gamer finds indent in head from prolonged headset use after ...

    www.aol.com/gamer-finds-indent-head-prolonged...

    In order to help get rid of headphone dents on the scalp or hair faster, gamers can gently massage the dent and the surrounding area. ... Stop tossing this 'garbage' ingredient—use it to boost ...

  3. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    The term 1-dimension refers to a simple pistonic relationship between the noise and the active speaker (mechanical noise reduction) or between the active speaker and the listener (headphones). Protection of a 3-dimensional zone requires many microphones and speakers, making it more expensive.

  4. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    Sensors: In a security alarm, some sensors detect intrusions. Sensors' locations are at the perimeter of the protected area, within it, or both. Sensors can detect intruders by different methods. Alerting devices indicate an alarm condition. Most commonly, these are bells, sirens, also and or flashing lights. Alerting devices serve the dual ...

  5. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Simplified graphical depiction of active noise reduction. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control.A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds.

  6. Microphonics - Wikipedia

    en.wikipedia.org/wiki/Microphonics

    The term may also be used to describe a video artifact common in older video cameras. Before the introduction of solid-state charge-coupled device (CCD) sensors to produce the image, vacuum tubes performed this task. Loud noises in the studio, such as rock bands or gunshot effects would cause the tubes to vibrate, producing a characteristic ...

  7. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    The 3.5mm headphone receptible (coll. "headphone jack") allows the immediate operation of passive headphones, as well as connection to other external auxiliary audio appliances. Among devices equipped with the connector, it is more commonly located at the bottom (charging port side) than on the top of the device.

  8. Glass break detector - Wikipedia

    en.wikipedia.org/wiki/Glass_break_detector

    A glass break detector is a sensor that detects if a pane of glass has been shattered or broken. [1] These sensors are commonly used near glass doors or glass storefront windows. They are widely used in electronic burglar-alarm systems. The detection process begins with a microphone that picks up noises and vibrations coming from the glass.

  9. Throat microphone - Wikipedia

    en.wikipedia.org/wiki/Throat_microphone

    A throat microphone, also called a laryngophone, is a type of contact microphone that absorbs vibrations directly from the wearer's throat by way of single or dual sensors worn against the neck. The sensors, called transducers, can pick up speech even in extremely noisy or windy environments, such as on a motorcycle or in a nightclub. Other ...