The guitar is a fretted musical instrument that typically has six strings. It is usually held flat against the player's body and played by strumming or plucking the strings with the dominant hand, while simultaneously pressing selected strings against frets with the fingers of the opposite hand. A plectrum or individual finger picks may also be used to strike the strings. The sound of the guitar is projected either acoustically, by means of a resonant chamber on the instrument, or amplified by an electronic pickup and an amplifier.
Tennis is a racket sport that is played either individually against a single opponent (singles) or between two teams of two players each (doubles). Each player uses a tennis racket that is strung with cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court. The object of the game is to manoeuvre the ball in such a way that the opponent is not able to play a valid return. The player who is unable to return the ball validly will not gain a point, while the opposite player will.
String instruments, stringed instruments, or chordophones are musical instruments that produce sound from vibrating strings when a performer plays or sounds the strings in some manner.
A racket or racquet is a sporting equipment used to strike a ball or shuttlecock back-and-forth in games such as tennis, badminton, squash, racquetball and padel. The typical basic structure of a racket consists of a widened distal end known as the head, an elongated handle known as the grip, and an reinforced connection between the head and handle known as the throat or heart.
The hurdy-gurdy is a string instrument that produces sound by a hand-crank-turned, rosined wheel rubbing against the strings. The wheel functions much like a violin bow, and single notes played on the instrument sound similar to those of a violin. Melodies are played on a keyboard that presses tangents—small wedges, typically made of wood or metal—against one or more of the strings to change their pitch. Like most other acoustic stringed instruments, it has a sound board and hollow cavity to make the vibration of the strings audible.
Piano acoustics is the set of physical properties of the piano that affect its sound. It is an area of study within musical acoustics.
A machine head is a geared apparatus for tuning stringed musical instruments by adjusting string tension. Machine heads are used on mandolins, guitars, double basses and others, and are usually located on the instrument's headstock. Other names for guitar tuners include pegs, gears, machines, cranks, knobs, tensioners and tighteners.
Catgut is a type of cord that is prepared from the natural fiber found in the walls of animal intestines. Catgut makers usually use sheep or goat intestines, but occasionally use the intestines of cattle, hogs, horses, mules, or donkeys. Despite the name, catgut is not made from cat intestines.
Babolat is a French tennis, badminton, and padel equipment company, headquartered in Lyon, best known for its strings and tennis racquets which are used by professional and recreational players worldwide. The company has made strings since 1875, when Pierre Babolat created the first strings made of natural gut. Babolat continued to focus on strings until 1994, when it became a "total tennis" company, producing also racquet frames and selling them in Europe. It then expanded sales to Japan, and later to the United States in 2000. Sales of Babolat racquets increased rapidly in North America and Europe. Babolat is also a pioneer in connected sport technology and launched a connected tennis racket in 2014 and a connected wrist-worn tennis wearable with PIQ in 2015. The Babolat Pop is used worldwide, and one of the leaders in tennis sensors.
A string is the vibrating element that produces sound in string instruments such as the guitar, harp, piano, and members of the violin family. Strings are lengths of a flexible material that a musical instrument holds under tension so that they can vibrate freely, but controllably. Strings may be "plain", consisting only of a single material, like steel, nylon, or gut, or wound, having a "core" of one material and an overwinding of another. This is to make the string vibrate at the desired pitch, while maintaining a low profile and sufficient flexibility for playability.
This page is a glossary of tennis terminology.
Frontenis is a sport that is played in a 30 meter pelota court using racquets and rubber balls. It can be played in pairs or singles, but only pairs frontenis is played in international competitions. This sport was developed in Mexico around 1900, and is accredited as a Basque pelota speciality.
A violin consists of a body or corpus, a neck, a finger board, a bridge, a soundpost, four strings, and various fittings. The fittings are the tuning pegs, tailpiece and tailgut, endpin, possibly one or more fine tuners on the tailpiece, and in the modern style of playing, usually a chinrest, either attached with the cup directly over the tailpiece or to the left of it. There are many variations of chinrests: center-mount types such as Flesch or Guarneri, clamped to the body on both sides of the tailpiece, and side-mount types clamped to the lower bout to the left of the tailpiece.
In tennis, the strings are the part of a tennis racquet which make contact with the ball. The strings form a woven network inside the head of the racquet. Strings have been made with a variety of materials and possess varying properties that have been measured, such as dynamic stiffness, tension retention, thickness (gauge), string texture, and rebound efficiency.
The Wilson Pro Staff Original, first introduced in 1984 is most known for being the model of racquet used by Pete Sampras. For this reason, it is known as a “Sampo”.
Since the sport's inception, the design and manufacture of tennis equipment has been affected by technological advances and regulations. As is common in major sports, regulations became more exacting over time, with improvements affecting the qualities of the tennis racket and the tennis ball.
Ektelon, Inc. is an American manufacturer of equipment for racquetball.
Gosen Co., Ltd. is a Japanese company that produces synthetic strings for the fishing, manufacturing and racquet sport industries.
A serve in tennis is a shot to start a point. A player will hit the ball with a racquet so it will fall into the diagonally opposite service box without being stopped by the net. Normally players begin a serve by tossing the ball into the air and hitting it. The ball can only touch the net on a return and will be considered good if it falls on the opposite side. If the ball contacts the net on the serve but then proceeds to the proper service box, it is called a let; this is not a legal serve in the major tours although it is also not a fault. Players normally serve overhead; however serving underhand is allowed. The serve is the only shot a player can take their time to set up instead of having to react to an opponent's shot; however, as of 2012, there is a 25-second limit to be allowed between points.
String is a long flexible structure made from fibers twisted together into a single strand, or from multiple such strands which are in turn twisted together. String is used to tie, bind, or hang other objects. It is also used as a material to make things, such as textiles, and in arts and crafts. String is a simple tool, and its use by humans is known to have been developed tens of thousands of years ago. In Mesoamerica, for example, string was invented some 20,000 to 30,000 years ago, and was made by twisting plant fibers together. String may also be a component in other tools, and in devices as diverse as weapons, musical instruments, and toys.
