Speakers how does it work

When a speaker moves back and forth it pushes on air particles which changes the air pressure and creates sound waves. Speakers work by converting electrical energy into mechanical energy motion.

The mechanical energy compresses air and converts the motion into sound energy or sound pressure level SPL. In speakers, a current is sent through the voice coil which produces an electric field that interacts with the magnetic field of the permanent magnet attached to the speaker. Like charges repel each other and different charges attract. As an audio signal is sent through the voice coil and the musical waveform moves up and down, the voice coil is attracted and repelled by the permanent magnet.

This makes the cone that the voice coil is attached to move back and forth. The back and forth motion creates pressure waves in the air that we perceive as sound.

The ultimate test of fidelity for a speaker is how similar the waveform in the air the pressure wave is to the electronic signal the sound recording that was sent into the amplifier.

There are several factors that determine how accurate the listening experience will be including the frequency response , the amount of distortion , and the directionality dispersion of the speaker. A typical test for frequency response sends out a sweep of frequencies from the bass to the mids, and up to the treble range to see if the sound from the speaker is the same in all these areas. The ideal frequency response for a speaker is very flat. This means the speaker would be the same level at low frequency as it is in the mids or highs.

The goal of a flat frequency response is to ensure that the people listening to your music experience it the way you intended it.

If your track is well mastered and sounds good on speakers with a flat response, you can be sure that it will sound its best on any playback system. Sensitivity is sometimes measured slightly differently. Therefore less current flows through an 8 ohm speaker, causing it to receive less power for the same voltage as a 4 ohm speaker.

In that case, a sensitivity of dB at 2. Coaxial speakers are type of 2-way speaker designed to take up less space and to replace single-cone speakers. They usually include a separate tweeter and one or more crossovers built-in. Coaxial speakers provide improved sound over a single cone speaker and allow more pricing choices and installation options.

Think of coaxial speakers as a middle point between single cone speakers the most basic speakers, with mediocre or poor performance and component speakers separate speakers with an external speaker crossover. They offer good fidelity at an affordable price in most cases. In this type of speaker system, tweeters are supplied only a high frequency sound from a high-pass crossover while the main driver is fed midrange and bass from the low-pass crossover.

In other words, they separate the sound you hear between two speakers for better results than a single speaker alone. Similarly, tweeters become distorted when attempting to produce bass or lower-frequency sounds. The use of a 2-way speaker crossover system limits the range of sound each receives, allowing for lower distortion and better sound quality at higher volumes, too.

Likewise, s low-pass filter blocks higher frequencies that a bass speaker cannot reproduce well and that would cause poor performance if used. The 3rd speaker allows improved midrange and even better sound production, lowered distortion, and clarity by offloading midrange sound to a dedicated midrange speaker. However, the crossover design depending on the crossover order, or the steepness of the cutoff is more complicated for those with a sharper cutoff to block unwanted frequencies.

They also offer the option to get improved sound by using high-performance midrange speakers that are better suited to it than midbass models. Diagram showing how a Bluetooth speaker works. Wireless speakers like this receive the audio signal in a digital format, convert it back to analog, and amplify then drive the loudspeaker inside. Bluetooth speakers are essentially a portable sound system made up of a battery, an integrated wireless receiver and amplifier, and speakers.

They connect to the BT wireless protocol to smartphones, TVs, and more. Wireless speakers are powered in various ways including by batteries, USBs and outlets or adapters. Many wireless speakers are powered by batteries. This is the most common way for people to use their wireless speaker because they can take it with them without having to worry about plugging into an outlet. You can also use a power outlet or an AC adapter to power a wireless speaker.

One of the most important distinctions between passive and active speakers is that a passive speaker has no power source. The amplifier, or receiver, for an active speaker provides this function.

Passive speakers are easier to connect because they have a built-in amplifier. Active speakers require the use of external amplifiers, which can be difficult and expensive. Passive speakers are easier to connect as there is no need for an amplifier and they are easier to power. Bluetooth is a common form of wireless technology.

It is commonly used in mobile phones, but it can also be found in laptop computers and digital cameras. Bluetooth transmits data over short distances, up to 10 meters. For this reason, it is the most common form of wireless technology for speakers. Using the wireless Bluetooth network protocol discussed above, a Bluetooth speaker will receive music, movies, podcasts or any audio wirelessly from any source device that has a Bluetooth transmitter built in.

This includes the following devices and more:. You then play music on that source device — computer, phone etc. You can control the volume of the audio either on the speaker itself or at the source.

Typically a Bluetooth speaker will have a range up to around 30 feet. Anything beyond that and your music or audio signal may cut in and out, or the speaker might not even connect with the source device in the first place. A Bluetooth in-ceiling, or for that matter, in-wall speaker works just as any other Bluetooth speaker works, its Bluetooth receiver pairing with a nearby Bluetooth transmitter for example, in your computer, phone or music player and playing music, movies, podcasts or other audio.

While these Bluetooth ceiling speakers are still quite convenient, most people would rather have, again, a portable Bluetooth speaker which they take from place to place. Anyway, a wireless Bluetooth or Wi-Fi speaker will still probably need at least one wire, for AC power, or you will need to replace its batteries — not quite as easy as replacing a bulb in a ceiling light fixture! Connecting a Bluetooth speaker with an iPhone or iPad is simplicity itself.

Again, it is so simple to pair a Bluetooth speaker with any computer, by using the following steps:. As simple as the above instructions on how to make your Bluetooth speaker work with Apple or Windows are, some people still seem to have problems getting the whole thing working. So here are a few basic troubleshooting suggestions. If you have followed the instructions above, and there is no discovering, pairing or actual music happening, try one or more of these:.

Bluetooth speakers these days sound absolutely great, but there are a couple of things you can do to make them sound even better. About Us Privacy Policy Disclaimers. In case of questions contact us at: hello speakergy. Speakergy is compensated for referring traffic and business to these companies. How-to Guides Speakers. Written by: Timothy Scott. Sound that is clear, crisp, and full of big,