If you're asking for an example of aguitar with a round back, "Ovation" and "Applause" (made by Ovation) are two brands of guitar with a round back.
A traditional style Mandolin has a round back. My father had one.
sitar
The string makes the sound by transferring it's vibration to the top of the guitar. The top vibrates, and that is amplified by the body of the guitar. The round hole is to let that sound escape.
Well in the guitar shop in Penzance, Cornwall, England. It would cost you round about £500
Ukuleles are seldom round. Normally they have a figure 8 shape like a guitar. It can be a sort of oval that looks like a pineapple. Any shape could be used.
A Spanish guitar has a round neck and a Hawaiian guitar has a square neck.A Spanish guitar is meant to be played by picking or strumming while a Hawaian guitar is meant to be on your lap or a table laid flat. A Hawaiian guitar has a high action and is meant to be played with a slide.
sitar
sita
There were round backed instruments called lutes. These were very similar to the round backed mandolins, and they really cannot be separated from each other during the earlier times because they were not standardized. There were also related round backed instruments called gitterns.
kareem has $200 to spend on a guitar he round a guitar that is priced at $159.99 A.kareem follows these steps to estimate the tax on the guitar. round the price of the guitar . find 10% of the rounded price. fine 5% of te rounded price
round about £200 it depends
A rebec was a bowed musical instrument which was strung like a violin. It was about the size of a violin, but the shape was more like that of a round backed lute. It was called a geige in Germany, which is a name also applied to a violin.
a guitar
http://redoctane.com/Guitar-Hero/Accessories/X-plorer-Guitar-Replacement-USB-Breakaway-Cable
The string makes the sound by transferring it's vibration to the top of the guitar. The top vibrates, and that is amplified by the body of the guitar. The round hole is to let that sound escape.
There is no reason why it should be round, simply a matter of tradition. Also, a round opening suites the curves of the body of the guitar is better than any other shape.
Thriller
The lute is bowl-shaped string instrument, strung in gut The vihuela from Spain is flat-backed and guitar shaped. It is tuned the same as a lute.