the top material is wood. wood is strong, flexible, and easy too carve.
Mastergrade Engleman Spruce - preferably with the longest drying time and lowest moisture content. The very best bits come from old piano soundboards where they have had all the frequencies put through them; this makes the wood more resonant at those same frequencies on a guitar. If you wanted a lower-budget but high quality soundboard then AAA grade cedar can be cheap. It is not worth using excellent wood unless every other aspect of the guitar is of high quality and if it is balanced (for resonance and preference) as whole. I.e. don't use plastic, make tight joints and use a tight grain piece of neck wood that is in-between the pitch (finger-tap and listen) of the fingerboard wood and the soundboard. As for the sides and back; quilted figured wood generally passes vibration easily, the nicer it looks the better.. :)
air is a good transmitter of sound energy. also metals are very good due to there metallic bonding properties. most materials are best at transmitting different frequencies, aka their resonant frequency.
Blocks are the most dangerous pyroclastic material.
Both diamond and graphite are alltropes of carbon. But the crystal structure of diamond makes it the hardest natural mineral, while the crystal structure of graphite makes it a natural for pencils.
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Mastergrade Engleman Spruce - preferably with the longest drying time and lowest moisture content. The very best bits come from old piano soundboards where they have had all the frequencies put through them; this makes the wood more resonant at those same frequencies on a guitar. If you wanted a lower-budget but high quality soundboard then AAA grade cedar can be cheap. It is not worth using excellent wood unless every other aspect of the guitar is of high quality and if it is balanced (for resonance and preference) as whole. I.e. don't use plastic, make tight joints and use a tight grain piece of neck wood that is in-between the pitch (finger-tap and listen) of the fingerboard wood and the soundboard. As for the sides and back; quilted figured wood generally passes vibration easily, the nicer it looks the better.. :)
If resonance is related to hardness (and it is) then the most resonant metal would be Beryllium.
The soundboard is made of spruce - the most resonant of all woods. The frame of the piano (the large metal apparatus that holds all the strings) is bolted to the soundboard. The soundboards purpose, as hinted at in the name, is to amplify and ritchen all the notes struck on the piano. The soundboard is easiest to see on an upright piano. It is the diagonal "strips of wood" visible on the back of the piano.
The soundboard acts like a big drumhead and when you hit a key it goes thru the bridge to the soundboard along the grain which produces the sound
Cartilage
The Norman Conquest is resonant because there are many, (or have been many) attempts to invade countries all over the world by other countries. Some have been successful, but most have failed. A good example is the invasion of Kuwait by Iraq .The Domesday Book also makes The Norman Conquest Resonant as it is like the census we have today to find out who owns what, how many people live in their houses and where you live.
air is a good transmitter of sound energy. also metals are very good due to there metallic bonding properties. most materials are best at transmitting different frequencies, aka their resonant frequency.
Marrow. It makes blood cells.
MANTLE
The appropriately titled website "SoundBoards" prides themselves on their collection of soundboards, and new information is regularly added to the site. Both Soundboard Archive and All Funny Soundboards have interesting material as well and are worth a look.
Steel
The three most common rope materials are nylon, polyester, and polypropylene.