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Noise -cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones which suppress unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing . Noise cancellation makes it possible to listen to audio ...
Audio feedback (also known as acoustic feedback, simply as feedback) is a positive feedback situation that may occur when an acoustic path exists between an audio output (for example, a loudspeaker) and its audio input (for example, a microphone or guitar pickup ). In this example, a signal received by the microphone is amplified and passed out ...
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 ...
The new book from the author of "Becoming" and "The Light We Carry" is a step-by-step guide "to unlocking your small power" and "sharing your whole self."
During extreme cold events, you may hear a loud boom and feel like you have experienced an earthquake. However, this event was more likely a cryoseism, also known as an ice quake or a frost quake ...
A microphone array is any number of microphones operating in tandem. There are many applications: Locating objects by sound: acoustic source localization, e.g., military use to locate the source (s) of artillery fire. Aircraft location and tracking. Typically, an array is made up of omnidirectional microphones, directional microphones, or a mix ...
The Academy Museum of Motion Pictures will launch the Disabilities, Representation and Film program July 13 in commemoration of the Americans with Disabilities Act, which was signed into law in ...
The iPhone Stereo Headset was introduced in 2007 and was bundled with the original iPhone and iPhone 3G, and featured a control capsule in-line with the left earbud's wire with a microphone and a single button, actuated by squeezing the unit, which can be programmed to control calls, presentations, music and video playback, launch Siri, or take pictures with the Camera application.