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  2. Use this simple trick to make your phone speaker louder - AOL

    www.aol.com/news/2015-08-04-use-this-simple...

    Easier than making cereal for breakfast. Step 1 - Take a bowl. Step 2 - Throw your phone into it. The shape of the bowl will work as an amplifier and the sound coming out of your phone will be ...

  3. Megaphone - Wikipedia

    en.wikipedia.org/wiki/Megaphone

    It consists of a microphone to convert soundwaves into an electrical audio signal, an amplifier powered by a battery to increase the power of the audio signal, and a loudspeaker to convert the audio signal to sound waves again. Although slightly heavier than acoustic megaphones, electric megaphones can amplify the voice to a higher level, to ...

  4. Amplifier - Wikipedia

    en.wikipedia.org/wiki/Amplifier

    An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or current). It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude (magnitude of the voltage or current) of a signal applied to its input ...

  5. Line level - Wikipedia

    en.wikipedia.org/wiki/Line_level

    Line out provides an audio signal output and line in receives a signal input. The line in/out connections on consumer-oriented audio equipment are typically unbalanced, with a 3.5 mm (0.14 inch, but commonly called "eighth inch") 3-conductor TRS minijack connector providing ground, left channel, and right channel, or stereo RCA jacks.

  6. Public address system - Wikipedia

    en.wikipedia.org/wiki/Public_address_system

    At the transmission end, a PSTN Telephone, mobile phone, VOIP phone or any other communication device that can access and make audio calls to a GSM-based mobile SIM card can communicate with it. At the receiving end, a GSM transceiver receives these network transmissions and reproduces the analogue audio signal via a Power Amplifier and speaker.

  7. How to connect your iPhone to a speaker - AOL

    www.aol.com/connect-iphone-speaker-150000038.html

    Follow these steps to connect your iPhone to a Bluetooth speaker.How to connect The music is terrible. You want to jump on aux, but you don't know how to connect your iPhone to the speaker.

  8. Audio power amplifier - Wikipedia

    en.wikipedia.org/wiki/Audio_power_amplifier

    Audio stereo power amplifier made by McIntosh The internal view of a Mission Cyrus One hi-fi integrated audio amplifier (1984) [1]. An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones.

  9. Phone etiquette 101: When it’s rude to be on speaker — and ...

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

    When exercising outside, it can also be a safety issue to use your phone’s speakers and not headphones (and sometimes vice versa). Safety supersedes etiquette. Let the person you’re talking to ...

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