What if violin is used for a long time and there is noise?
The violin has been used for a long time and it is normal to have more or less noise because you use it every day, so don't be afraid of problems with violin, just solve them in time. , overcome it and master correct method, there is no problem for us.
First, let's take a look at violin bridge, a method for diagnosing and eliminating noise caused by bridge:
1. Diagnosis of noise caused by piano code: Place head of piano against wall covered with towels, press piano hard with your left finger while pressing piano hard with bow Immediately turn two corners to see if it disappears whether noise is a bit when volume is slightly reduced. Then tilt piano stand back and forth and try moving it left and right to see if noise disappears.
2. Type of noise generated by bridge:
①. The radians of two legs of piano bridge do not match curvature of butterfly leaf on panel, resulting in no close contact between legs of bridge and violin panel, and there are gaps in various situations. The sides are curved and there is a gap that creates noise.
②, saddle is tilted forward or backward, resulting in a gap between bridge legs facing neck or tailpiece, and causing noise.
③. The position of seat on panel cover sheet is shifted to left and right, resulting in loose contact with it and gaps. When deflection is severe, force will be directed to one horse's leg and other horse's leg will be less loaded, resulting in gap cracking.
④ The bridge itself is soft, or it has been twisted and used for a long time, causing hollow seam of bridge to touch and make noise.
⑤ The bridge itself is soft or bridge is too finely polished, causing strings to go too deep into bridge and make noise, especially thinnest strings.
⑥The top edge of bridge is polished too low, so that height of strings from fretboard is not high enough, resulting in noise when strings touch fretboard when playing under high pressure.
3. How to eliminate piano noise:
For type ①, seat must be carefully polished.
Types ② and ③ should be carefully adjusted.
Types ④, ⑤ and ⑥ must be replaced with new codes.
Next, let's take a look at nut, diagnostics, and a method for eliminating nut noise:
From cross section of nut, it is a fan at an angle of 90 degrees. The starting point of contact between string and nut, i.e. point of turn of string, must be edge on side of neck. Should be The height from highest point of fretboard is determined by feel of fingers, usually height of a credit card.
1. Nut Noise Diagnosis: A slight squeak is heard when a string is empty or all strings are empty, and noise disappears when a string or all strings are fully depressed.
2. w typethe mind generated by nut:
① The nut is too thin and edge height is not enough, so that gap between strings and fretboard is not enough, resulting in noise when strings touch fretboard when strings are empty.
② The nut radian is wrong, edge is low, and starting point of string is shifted back, resulting in a gap between string and edge and noise.
③. Due to improper manufacturing or long-term tuning and wear of nut, string groove is too deep so that there is not enough clearance between strings and fretboard, resulting in noise when strings touch fretboard. when lines are empty.
④ Due to improper manufacturing or long-term wear, string groove is too wide, causing strings to vibrate between groove walls on both sides, resulting in noise.
3. How to eliminate noise generated by piano nut: use a blade (a utility knife or an old-fashioned razor blade) to cut gap between piano nut and fretboard, and then use a utility knife or carving knife, which slowly cuts into top of nut so that it falls off.
In first case, a piece of wood of appropriate thickness can be placed under nut to slightly raise nut;
Types ②, ③ and ④ can properly polish curved surface of nut, and then insert a piece of wood of suitable thickness under nut to lift nut a little. If you are afraid of damaging a child's violin, then use method of stuffing hard cowhide strips around edges to do without it.
Diagnosing and eliminating noise caused by fine tuning:
1. Diagnosing noise caused by fine tuning: Use a thin wooden stick with soft wood or just your fingers to remove noise by fingering strings or pulling strings hard. Tap and dial in various fine tuning parts to see if noise can go away a bit.
2. Type of noise caused by fine tuning:
① Fine tuning itself has quality problems, such as back rivet of L-shaped brace hook is too loose, causing cross member of L-shaped brace hook to collide with two walls of socket, creating noise.
②The fine adjustment fixing nut is not tight, and it is loose on shank. Some strings have finning grooves on bottom, but fins do not fit into grooves, resulting in unstable tuning and noise.
③The tip of T-shaped fine adjustment screw is screwed in, and bottom end of inner and outer tubes of gong is too long, so that crossbar of L-shaped hook of tension string touches violin. panels and makes noise.
④The tip of T-shaped fine adjustment screw is not unscrewed from lower end of inner and outer tubes of gong, so that crossbar of L-shaped hook of tension string touches inner and outer tubes of gongand creates noise.
⑤The inner and outer tubes of gong are too long, causing L-shaped hook of tension string to touch panel of violin and create noise.
3. How to eliminate noise caused by fine tuning:
For type ①, you can place a finely tuned backing rivet on an iron block and tap it several times with an iron hammer. But don't hit too hard.
Types ②, ③, ④ can be reset and customized.
For fifth type, it is necessary to remove trimmer and grind inner and outer gong-shaped wire pipes to a shorter length.
Diagnosis and elimination of tailpiece and chinrest noise:
1. Method for diagnosing noise caused by tailpiece and chin rest: Turn violin over, lean belly of violin against wall covered with towels, head of violin against chest, and bow strongly pulling strings, first press down and pull chin rest, then press tailpiece on three sides: up, left, and right, and then squeeze tailpiece with your left finger to see if noise disappears.
2. Tailpiece and chin rest noise types:
①The semi-column at lower end of shank deflects in arched hole of chin rest and makes noise when chin rest touches.
②Because sinew is too thin or nut-like wooden block is too low, half-cylinder at lower end of tailpiece hits piano board, creating noise.
③The knot of bovine tendon thread under shank is too large or end of thread is pointing down, which will cause noise when hitting violin panel.
④ Some violins (mostly used or inexpensive practice pianos) use thin steel wires covered with plastic tubes instead of stranded wires. The two metal chucks, which are perforated by steel wires under tailpiece, are also cause of noise.
⑤ The chinrest door hook is not adjusted tightly, or plug on it falls off, causing noise between chinrest and piano board.
3. How to eliminate tailpiece and chin rest noise:
Types ①, ②, ③ and ⑤ can be adjusted or tidy up, if necessary, you can fill sponge to eliminate noise.
For fourth type, it is best to replace with beef tendon thread. In addition to above five aspects, strings are also an important factor in generating noise, such as strings do not get stuck, outer layer of string winding is loose or broken, and so on. The cello also has problem that stem (leg) goes through board and wood is severely loosened causing mahogany or metal stem to flex and if not pulled out for a long time it will touch panel or backboard ( often a shield) in stomach to producemake noise.
Diagnosis and exclusion of neck noise:
The neck must be firmly glued to neck. The surface of fretboard must be flat and parallel to strings for a fixed distance, and this distance is determined by feel of player when fingers are pressed.
1. Fretboard Noise Diagnosis: Check if fretboard is firmly glued to fretboard and compare strings to make sure fretboard is flat and parallel to strings when fixed. distance, and then in each violin While pressing strings, press your fingers one by one from nut, press bow hard and play, listening for any unexpected sounds of string touching.
2. Neck Noise Type:
① The adhesive between fretboard and fretboard is loose, and there is a gap that produces noise. Very weak, usually not easy to detect unless fingerboard material is of poor quality and vibrates easily.
② The neck surface is deformed and uneven, unable to stay parallel to strings, and partially arched to touch strings. Or, although arch is not high, strings will not be affected when bow is lightly pressed and played, but strings will be affected to produce noise when bow is pressed hard.
③. The neck surface is flat and undeformed, but bridge side is higher and nut side is lower, causing top phoneme to touch strings and making noise when top phoneme is pressed.
3. How to eliminate fretboard noise:
For type ①, if refining is severe and gap is large, just use an old-fashioned eagle-beard blade to cut through gap between fretboard and fretboard, remove fretboard, and glue it back together; if degumming is insignificant, gap is small or just a part, do not remove it by force, but simply drop glue, and immediately clamp it with a bench vise, lips of which are wrapped with a towel for protection.
For second type, it's best to replace neck. If it is difficult to remove, assuming protective measures are taken on violin, file fretboard with a wood file and apply new paint.
Type ③ can be easily solved by adjusting height of the bridge.