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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. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   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 ...

4. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   In the context of telecommunication, a headset is a combination of a headphone and microphone. Headphones connect to a signal source such as an audio amplifier , radio , CD player , portable media player , mobile phone , video game console , or electronic musical instrument , either directly using a cord, or using wireless technology such as ...

5. Nintendo Entertainment System - Wikipedia

   en.wikipedia.org/wiki/Nintendo_Entertainment_System

   The proposed Advanced Video System bundle includes cassette drive and wireless accessories. Subsequent plans for the Nintendo Advanced Video System likewise never materialized. It was privately demonstrated as a repackaged Famicom console featuring a keyboard, cassette data recorder, wireless joystick controller, and a special BASIC cartridge.

6. Wireless device radiation and health - Wikipedia

   en.wikipedia.org/wiki/Wireless_device_radiation...

   The HPA also says that due to the mobile phone's adaptive power ability, a DECT cordless phone's radiation could actually exceed the radiation of a mobile phone. The HPA explains that while the DECT cordless phone's radiation has an average output power of 10 mW, it is actually in the form of 100 bursts per second of 250 mW, a strength comparable to some mobile phones.

7. Sennheiser - Wikipedia

   en.wikipedia.org/wiki/Sennheiser

   Sennheiser electronic GmbH & Co. KG ( / ˈzɛnhaɪzər /, German pronunciation: [zɛnˈhaɪ̯zɐ]) is a German audio equipment manufacturer headquartered in Wedemark. Sennheiser specializes in equipment for both the consumer and professional audio markets, including microphones, headphones, and loudspeakers . Founded in 1945 by Fritz Sennheiser ...