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  2. Speakerphone - Wikipedia

    en.wikipedia.org/wiki/Speakerphone

    The handset speakerphone allows hands free conversations away from the base unit. The base speakerphone is located in the base unit. The user must be at the base unit, but still gets the added benefits of having hands free conversations. Most base speakerphones have a secondary keypad for dialing calls on the base unit.

  3. What 'secret' loudspeaker codes mean at department stores - AOL

    www.aol.com/news/2010-10-13-what-secret...

    If you've been shopping in a big box retail store you've probably heard an announcement on the loudspeaker such as, "code yellow toys, code yellow toys." This "code" is one of many innocuous ...

  4. Phone etiquette 101: When it’s rude to be on speaker - AOL

    www.aol.com/news/phone-etiquette-101-rude...

    Don’t use speakerphone. Do not use speakerphone for calls you make in public — use headphones. This is especially true for video calls or when watching to something on your device.

  5. Loudspeaker - Wikipedia

    en.wikipedia.org/wiki/Loudspeaker

    A loudspeaker (commonly referred to as a speaker or, more fully, a speaker system) is a combination of one or more speaker drivers, an enclosure, and electrical connections (possibly including a crossover network). The speaker driver is an electroacoustic transducer [1]: 597 that converts an electrical audio signal into a corresponding sound. [2]

  6. Output device - Wikipedia

    en.wikipedia.org/wiki/Output_device

    A speaker is an output device that produces sound through an oscillating transducer called a driver. The equivalent input device is a microphone . Speakers are plugged into a computer's sound card via a myriad of interfaces, such as a phone connector for analog audio, or SPDIF for digital audio.

  7. Public address system - Wikipedia

    en.wikipedia.org/wiki/Public_address_system

    Early public-address system from around 1920 using a Magnavox speaker. The microphone had a metal reflector that concentrated the sound waves, allowing the speaker to stand back so it would not obscure his or her face. The early vacuum tubes could not produce much gain, and even with six tubes the amplifier had low power.

  8. Sidetone - Wikipedia

    en.wikipedia.org/wiki/Sidetone

    Sidetone is disabled when telephones are running in speakerphone mode to prevent direct acoustical feedback from the speaker to the microphone, resulting in howling. Sidetone can be, and often is, amplified for land-line phones for the hearing impaired.

  9. Daily Briefing: What will 2025 mean for America? - AOL

    www.aol.com/news/2025-mean-america-115317782.html

    Today is the last day of the year — and an era for Americans. Some Republicans this week haven't committed to backing Mike Johnson for House Speaker despite President-elect Donald Trump's support.

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