What is a Speaker?

Speakers are one of the most common output devices used to connect to computers to produce sound. Some speakers are designed to connect to any type of sound system, while others are designed to connect only to computers. Computer speakers generate signals that are used by the computer's sound card to produce sound. The primary purpose of speakers is to provide audio output to listeners. Electromagnetic waves are transducers, so they are converted into sound waves by speakers. Devices such as audio receivers and computers provide audio input to speakers. Audio input can be in analog or digital format. The function of an analog speaker is simply to magnify analog electromagnetic waves into sound waves.

Sound waves are generated in analog form, but first the digital input is converted to an analog signal by a digital speaker and then the sound waves are generated. Amplitude and frequency define the sound produced by a loudspeaker. Frequency determines the pitch of a sound, i.e. how high or low a sound is. For example, a bass guitar or kick drum produces low-pitched sound waves, while a soprano voice produces high-frequency sounds. Sound quality, or how clear it is, depends on the capabilities of your speaker system. Accurate reproduction of sound frequencies is the best indicator of sound quality.

It has a large number of speakers with different speaker cones that can provide more accurate sound in different areas. A 3-way speaker typically includes a subwoofer, midrange driver, and tweeter, while a 2-way speaker typically includes a midrange driver and tweeter. Air pressure produced by sound waves from a loudspeaker determines volume or amplitude.

Like a sound card of computer and some other audio sources produce the signal low, which may need to be augmented by the speakers. This is the reason, to amplify the signal, most of the external computer speakers use electricity; hence, they are amplified. Speakers that have the ability to increase the sound input are commonly known as active speakers. If a speaker can be plugged into an electrical outlet or consists of volume control, you can easily determine if the speaker is active. The passive speakers are those that do not have any internal amplification; these speakers need a high level of audio input as they do not increase the audio signal.

Usually, speakers come in pairs that led to producing stereo sound. It means, on two separate channels, the left and right speakers produce audio. Music sounds much more natural when you use two speakers, as in this condition, our ears hear sounds from the left and right at one time, which makes sounds much more natural. Furthermore, surround systems can produce more realistic sound as they may include four to seven speakers, including a subwoofer.