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2. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   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 transmitter in the microphone body, which transmits the audio signal from the ...

3. Phantom power - Wikipedia

   en.wikipedia.org/wiki/Phantom_Power

   Phantom power. Phantom power button and indicator light. Phantom power, in the context of professional audio equipment, is DC electric power equally applied to both signal wires in balanced microphone cables, forming a phantom circuit, to operate microphones that contain active electronic circuitry. [ 1] It is best known as a convenient power ...

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. Ten-code - Wikipedia

   en.wikipedia.org/wiki/Ten-code

   Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code.[ 1]

6. A Black jobseeker said he used a white-sounding name to land ...

   www.aol.com/news/black-jobseeker-said-used-white...

   A Black man filed an employment discrimination lawsuit against a hotel after his job applications went ignored until he changed the name on his résumé to a white-sounding name.

7. Microphone - Wikipedia

   en.wikipedia.org/wiki/Microphone

   In this configuration the output impedance of the microphone should be negligible in comparison with the input impedance of the pre-amplifier (in practice a pre-amp impedance at least 10 times greater than the microphone impedance is recommended). By doing so, the signal is attenuated minimally and almost no power is used in the process. [61]