Date First Published: 3rd July 2023
Topic: Computer Systems
Subtopic: Computer Hardware
Article Type: Computer Terms & Definitions
Difficulty: EasyDifficulty Level: 2/10
Learn about what speakers are in this article.
Speakers are output devices used by computers to generate sound that can be heard by the listener. They are most commonly used to listen to music and take part in VoIP conversations. Some speakers are only designed to work with specific computers, whilst others can work with any type of sound system.
Speakers almost always come in pairs which allows them to produce stereo sound. This means that the left and right speakers transmit audio on two different channels. This makes audio sounds more natural because most people's ears are used to hearing sounds from both the left and right sides at the same time. Sometimes, surround systems may include 4-7 speakers.
Speakers work by converting electromagnetic waves into sound waves. The speakers receive a digital audio signal from a computer and convert it into an analogue signal. The analogue electronic waves are then amplified into sound waves that can be heard by the listener. Since sound waves are always produced in analogue form, digital speakers need to convert the digital input into an analogue signal before generating the sound waves.
Speakers can be external or internal. External speakers connect to a computer by a cable or a Bluetooth connection and have a power source, like an AC adapter or batteries. The signal input connector is often a 3.5 mm jack plug, an RCA connector, or a USB port to supply both signal and power. Portable devices, including laptops, smartphones, and tablets have built-in speakers. However, external speakers can be connected to those devices if louder sound or surround sound is needed. Connecting external speakers to those devices will disable the built-in speakers. Sometimes, computer monitors may have integrated speakers.
Below are indicators that can be used to measure the sound quality of speakers:
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