By pressing down on a key in a piano, you cause a hammer to strike a string which creates standing waves in that string.

• A piano naturally has dampers which reduce the amount of time it takes for a note to dissipate. This is generally useful as it allows for the notes to not get muddled with each other when a pianist is trying to play a piece. This does not, however, allow for a pianist to play legato with ease, which is what the damper pedal is for. The damper pedal raises all of the dampers off the strings, allowing the strings to continue to vibrate after the key has been released and until the pianist either releases the pedal or the notes naturally dissipate. 

• A piano naturally has dampers which reduce the amount of time it takes for a note to dissipate. This is generally useful as it allows for the notes to not get muddled with each other when a pianist is trying to play a piece. This does not, however, allow for a pianist to play legato with ease, which is what the damper pedal is for. The damper pedal raises all of the dampers off the strings, allowing the strings to continue to vibrate after the key has been released and until the pianist either releases the pedal or the notes naturally dissipate. 

• A piano naturally has dampers which reduce the amount of time it takes for a note to dissipate. This is generally useful as it allows for the notes to not get muddled with each other when a pianist is trying to play a piece. This does not, however, allow for a pianist to play legato with ease, which is what the damper pedal is for. The damper pedal raises all of the dampers off the strings, allowing the strings to continue to vibrate after the key has been released and until the pianist either releases the pedal or the notes naturally dissipate. 

• A piano naturally has dampers which reduce the amount of time it takes for a note to dissipate. This is generally useful as it allows for the notes to not get muddled with each other when a pianist is trying to play a piece. This does not, however, allow for a pianist to play legato with ease, which is what the damper pedal is for. The damper pedal raises all of the dampers off the strings, allowing the strings to continue to vibrate after the key has been released and until the pianist either releases the pedal or the notes naturally dissipate. 

• Sound waves are mechanical waves, and in a piano the majority of the mechanical waves produced are transverse, other than the occasional longitudinal wave produced by tension in the string. 

• Pianos are specifically built as a kind of a large echo chamber which allows the sound produced from the strings to resonate and grow to produce a louder and more booming sound. Another unique thing about piano strings that helps with the sound is the fact that the strings are tuned and lengthened to a fundamental frequency which increases the sound created by the stings.