Guitar components quiet
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Contents Something about sound The strings The body The air inside More detail and other links First, something about sound If you put your finger gently on a loudspeaker you will feel it vibrate - if it is playing a low note loudly you can see it moving. When it moves forwards, it compresses the air next to it, which raises its pressure. Some of this air flows outwards, compressing the next layer of air.
The disturbance in the air spreads out as a travelling sound wave. Ultimately this sound wave causes a very tiny vibration in your eardrum - but that's another story. At any point in the air near the source of sound, the molecules are moving backwards and forwards, and the air pressure varies up and down by very small amounts. The number of vibrations per second is called the frequency which is measured in cycles per second or Hertz Hz.
The pitch of a note is almost entirely determined by the frequency: high frequency for high pitch and low for low. For example, vibrations per second Hz is the frequency of vibration of the A string on a guitar. The A above that second fret on the G string is Hz. The next A 5th fret on the high E string is Hz, which is the orchestral tuning A.
The guitar A string plays the A normally written at the bottom of the bass clef. In guitar music, however, it is normally written an octave higher. The lowest note on the standard guitar is E at about 83 Hz, but a bass guitar can play down to 41 Hz. The orginary guitar can play notes with fundamental frequencies above 1 kHz. Human ears are most sensitive to sounds between 1 and 4 kHz - about two to four octaves above middle C. Although the fundamental frequency of the guitar notes do not usually go up into this range, the instrument does output acoustic power in this range, in the higher harmonics of the most of its notes.
For an introduction to harmonics, see Strings and standing waves. To relate notes to frequencies, see Notes and frequencies. The strings The pitch of a vibrating string depends on four things. The mass of the string : more massive strings vibrate more slowly.
On steel string guitars, the strings get thicker from high to low. On classical guitars, the size change is complicated by a change in density: the low density nylon strings get thicker from the E to B to G; then the higher density wire-wound nylon strings get thicker from D to A to E. The frequency can also be changed by changing the tension in the string using the tuning pegs: tighter gives higher pitch. This is what what you do when you tune up.
The frequency also depends on the length of the string that is free to vibrate. In playing, you change this by holding the string firmly against the fingerboard with a finger of the left hand. Shortening the string stopping it on a higher fret gives higher pitch. Finally there is the mode of vibration , which is a whole interesting topic on its own. For more about strings and harmonics, see Strings and standing waves.
The strings themselves make hardly any noise: they are thin and slip easily through the air without making much of disturbance - and a sound wave is a disturbance of the air. An electric guitar played without an amplifier makes little noise, and an acoustic guitar would be much quieter without the vibrations of its bridge and body. In an acoustic guitar, the vibration of the string is transferred via the bridge and saddle to the top plate body of the guitar.
The body The body serves to transmit the vibration of the bridge into vibration of the air around it. For this it needs a relatively large surface area so that it can push a reasonable amount of air backwards and forwards. The top plate is made so that it can vibrate up and down relatively easily. It is usually made of spruce or another light, springy wood, about 2. On the inside of the plate is a series of braces.
These strengthen the plate. An important function is to keep the plate flat, despite the action of the strings which tends to make the saddle rotate. The braces also affect the way in which the top plate vibrates. For more information about vibrations in the top plate and in the body, see the links below. The back plate is much less important acoustically for most frequencies, partly because it is held against the player's body.
The sides of the guitar do not vibrate much in the direction perpendicular to their surface, and so do not radiate much sound. It is worth making it clear that the body doesn't amplify the sound in the technical sense of amplify.
An electronic amplifier takes a signal with small power and, using electrical power from the mains, turns it into a more powerful signal. In an acoustic guitar, all of the sound energy that is produced by the body originally comes from energy put into the string by the guitarists finger.
The purpose of the body is to make that conversion process more efficient. In an electric guitar, very little of the energy of the plucked string is converted to sound. The air inside The air inside the body is quite important, especially for the low range on the instrument. It can vibrate a little like the air in a bottle when you blow across the top. In fact if you sing a note somewhere between F 2 and A2 it depends on the guitar while holding your ear close to the sound hole, you will hear the air in the body resonating.
This is called the Helmholtz resonance and is introduced below. Another way to hear the effect of this resonance is to play the open A string and, while it is sounding, move a piece of cardboard or paper back and forth across the soundhole.
This stops the resonance or shifts it to a lower frequency and you will notice the loss of bass response when you close up the hole. The air inside is also coupled effectively to the lowest resonance of the top plate. Together they give a strong resonance at about an octave above the main air resonance. The air also couples the motion of the top and back plates to some extent. The Helmholtz resonance of a guitar is due to the air at the soundhole oscillating, driven by the springiness of the air inside the body.
I expect that everyone has blown across the top of a bottle and enjoyed the surprisingly low pitched note that results. This lowest guitar resonance is similar. Air is springy: when you compress it, its pressure increases. Consider a 'lump' of air at the soundhole. If this moves into the body a small distance, it compresses the internal air. That pressure now drives the 'lump' of air out but, when it gets to its original position, its momentum takes it on outside the body a small distance.
This rarifies the air inside the body, which then sucks the 'lump' of air back in. It can thus vibrate like a mass on a spring.
In practice, it is not just the compression of the air in the body, but also the distension of the body itself which generates the higher pressure. This is analysed quantitatively in Helmholtz Resonance. More detail and other links Guitar anatomy Acoustically important construction features Acoustic concepts and measurement Resonant guitar modes Intermediate Timescale phenomena Guitar plates and Chladni patterns experimental results showing the vibration of a guitar belly and an intact guitar.
Strings and standing waves a simple introduction to vibrating strings. A tool for calculating note and finger positions from Christopher Mears. Site map Contact Us. How does a guitar work? If you put your finger gently on a loudspeaker you will feel it vibrate - if it is playing a low note loudly you can see it moving.
Understanding Guitar Grounding
Javascript is disabled on your browser. To view this site, you must enable JavaScript or upgrade to a JavaScript-capable browser. Designed to sound more like a high-end condenser mic than a magnetic pickup, the Quiet Coil NC-1 provides the most natural acoustic guitar sound imaginable. Shop Now. Heavy Hitters High Output Humbuckers Until recently, when most guitarists thought of Mojotone, they only thought of vintage-style pickups and amps.
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Above: A properly screened Strat-type guitar. To make a significant difference, the whole surface area of the pickup and wiring cavities must be covered and connected to the earth side of the circuit. There must be electrical continuity throughout, and in this example, every join in the copper foil is bridged with solder. Electrical noise — hiss, buzz and hum — is something that plagues every electric guitarist to some degree, but noise comes in a variety of forms and it is important to establish exactly which kind s you are experiencing in order to devise an appropriate solution. If you think you are suffering from noise that isn't generated in one of these ways, I'd like to hear about it! The most efficient way to track down noise in a guitar system is to think of the amplifier or studio monitor system as the end of your signal chain and work systematically back from there. If you don't do this, you have no idea whether the noise you are hearing from the amplifier is being generated within the amp itself, or being picked up by the guitar and fed to the amp. You could end up taking steps to solve a problem you don't have, as well as completely failing to solve the one you actually do have.
Connect an electric instrument to a computer running Logic Pro
Semi-hollow and hollow body electric guitars make more sound unplugged, but most of them are also relatively quiet when compared to an acoustic guitar. The SLGN is indeed slightly louder than an unplugged solid body electric guitar. As mentioned above, I loved that the SLG allows me to practice without requiring additional amp or effects. Silent guitars work by converting the vibrations produced by the strings into electric current via a piezoelectric pickup. Since silent guitars have no traditional guitar body, the vibrations of the strings are not amplified, which keeps the guitar volume low.
How can I make my electric guitar louder?
Guitar hum can ruin recordings and be a real pain when performing live. Read through the different questions to figure out which one applies to you, then read through the suggested solutions to help get rid of that annoying hum or buzz. If you want to change your pickups to improve your tone, check out this guide for a step-by-step tutorial on how to upgrade your pickups. This is the most common type of hum you hear in electric guitars. As mentioned earlier, mains hum is the result of all the wiring in your home creating an electromagnetic field. Dealing with this hum means figuring out what devices or wiring is causing the issue.
5 guitar hacks to get rid of noise in your rig
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25 ways to upgrade your Fender Stratocaster
It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. I get a buzzing noise from my guitar when idle. However, when I touch the strings or touch any metal parts strings, bridge or the metal portion near the output jack , the noise goes away completely.
Electric guitar
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DIY "Silent" Practise Guitar
I've just taken up the classical guitar and am going to have to put in a great deal of practise. Unfortunately I live with my family in a two bedroom, Victorian era flat. There is always someone on the other side of a door or thin wall to annoy, especially at night or in the early morning. I need some way to practise more quietly at least some of the time. I don't want to spend much money as I may discover I hate classical guitar in a few months. There are four of options:. Obviously I chose option 4 here.
An electric guitar is a guitar that requires external amplification in order to be heard at typical performance volumes, unlike a standard acoustic guitar. It uses one or more pickups to convert the vibration of its strings into electrical signals, which ultimately are reproduced as sound by loudspeakers. The sound is sometimes shaped or electronically altered to achieve different timbres or tonal qualities on the amplifier settings or the knobs on the guitar from that of an acoustic guitar. Often, this is done through the use of effects such as reverb , distortion and "overdrive" ; the latter is considered to be a key element of electric blues guitar music and rock guitar playing.
After a long wandering through the flooded forums,
What touching a phrase :)
there are analogs?