![]() We see that for half the period, there is an increase in SPL relative to ambient pressure, and for the other half, there is a decrease in SPL relative to ambient pressure. Here is an example of a simple 1 kHz sinusoidal sound wave. Note that sound waves do not cause mass movement of air particles but rather cause the localized movement of the air molecules, creating moments of increased pressure and decreased pressure relative to the ambient pressure in the medium. ![]() We typically hear sound waves transmitted through the air but can also hear them in water and other liquids or through the solids around us. A sound wave transverses through a medium (gas, liquid, solid) and causes variations in localized sound pressure level according to the waveform. It's the speaker's job to convert (transduce) audio signals into their coinciding sound waves. In this article, we'll discuss, at a beginner's level, how speakers produce sound.īefore we get into the bulk of this article, let's discuss two forms of energy: sound and audio.Īudio signals are effectively electrical representations of sound waves. ![]() In other words, an AC electrical audio signal is sent to a speaker, which causes a diaphragm to push and pull air to propagate sound waves. An amplified audio signal (alternating current) that has the same waveform as the sound wave is responsible for vibrating the speaker diaphragm. How do speakers produce sound? Loudspeakers produce sound waves by causing a thin diaphragm to vibrate and disrupt the air pressure around it in the form of the intended sound wave. If the mechanics behind how speakers work is a mystery, then this article is just for you! These sound-producing devices are found in our televisions and computers, at performance venues, in public spaces such as malls, places of worship and airports, and even in our pockets and palms with the popularity of the smartphone. Speakers are somewhat ubiquitous nowadays.
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