Posts Tagged ‘How Guitars Work’

A Primer On How Guitars Work

Lots of people, musicians included, have possibly thought about exactly how guitars function. Nevertheless, they most likely are also puzzled by the many terms used to explain how a guitar creates the sound we hear. There’s a substantial amount of physics associated with it, and people who never have taken a day of physics most likely would not fully grasp it. That’s where this article will come in handy. In the following paragraphs, we’ll explain how both Acoustic as well as Electric guitars function in terminology that everybody can comprehend.

How the Acoustic Guitar Works:

To begin with, whenever a string vibrates (as you play it), it creates vibrations at a particular frequency. The frequency at which a string vibrates is set by the weight, length, and tension of the string.

The body of the guitar takes in the vibration of the strings and then sends the sound out into the air. This is actually the sound that is heard when the guitar string is played.

The Acoustic guitar,contains a soundhole. This soundhole acts to enhance the sound of the vibration that is generated by the strings. With no soundhole, the sound would be almost inaudible, which is the situation with a solid body Electric guitar.

To change the length (and thus alter the sound that’s heard) of the string, you have to change the tension of the string. One does this by pressing down on the string on one of the frets and then playing that string. Doing this alters the frequency of the vibration, which, subsequently, changes the sound which is heard.

The way the Electric guitar Works:

Electric guitars actually aren’t very much different from Acoustic guitars. Actually, the primary distinction among the two is the fact that one consists of solid wood (without any holes), while the other has a hollow-body with a soundhole. How Electric guitars function is a little different than how Acoustic guitars function.

The same as with the Acoustic guitar, when a string is played, it vibrates. That vibration creates the sound that people hear. The frequency of the vibration is, once again, based on the weight, length and tension of the string.

Without any soundhole, the Electric guitar is not able to amplify on it’s own the sound created by the vibration of the strings. Therefore, the sound heard from an un-amplified Electric guitar is small. For this reason guitar pickups and amplifiers are required to make the sound loud enough for anyone to hear.

Pickups essentially take the vibration of the strings and change it into a useable electrical voltage. This voltage is then fed into the amplifier by means ofa cable, and the voltage is then amplified. The sound that ensues comes out of the amplifier loudspeaker.

Amplifiers which have pre-built distortion (and virtually all of them do now) can distort the electrical voltage (vibration) by clipping it. The sound that results out of this clipping is what is known as distortion.

Other forms of guitar effects found on amps and pedals do very much the same thing—they change the electrical voltage that is fed to them by the pickups of the guitar.

And that’s how guitars work. No physics necessary.