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2. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   Singer Cody Simpson using a wireless microphone headset in a 2013 concert in Montreal. 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 ...

3. 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.

4. Body area network - Wikipedia

   en.wikipedia.org/wiki/Body_area_network

   About six years later, the term "BAN" came to refer to systems where communication is entirely within, on, and in the immediate proximity of a human body. [9] [10] A WBAN system can use WPAN wireless technologies as gateways to reach longer ranges. Through gateway devices, it is possible to connect the wearable devices on the human body to the ...

5. Surround sound - Wikipedia

   en.wikipedia.org/wiki/Surround_sound

   Surround sound. Surround sound is a technique for enriching the fidelity and depth of sound reproduction by using multiple audio channels from speakers that surround the listener ( surround channels ). Its first application was in movie theaters. Prior to surround sound, theater sound systems commonly had three screen channels of sound that ...

6. 'He's on top of the roof!' Bodycam video shows delays after ...

   www.aol.com/hes-top-roof-bodycam-video-211026798...

   In the footage released Thursday, audio timestamped at 6:11 p.m. plays a volley of three shots, then a quick succession of more shots, similar to the way interim U.S. Secret Service Director ...

7. 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 ...