Picture from:
http://www.feature.fm/blog/what-is-music-2/
Picture from:
http://www.posterus.sk/?p=13941
|
Sound travels through many different
mediums--even the human body. Hence, people can "feel the
beat" at a rock concert or when music is really loud
because the sound creates a pressure difference in their
bodies as the sound travels through them. Low notes have a
wider wave so people can actually feel them vibrating
their bodies. High notes are thinner waves so people can't
seem to detect the pressure difference vibrating their
bodies as well.
Different instruments sound different even if they are all
the same pitch because the quality of the sound or timbre
is different. Stringed instruments create music through
the plucking, rubbing, or striking of the strings. Each
string has a certain frequency that it naturally vibrates
at. The vibration of the strings cause the air to vibrate
at the same frequency and, thus, music is produced (if the
person playing the instrument actually knows how to play
well). Short strings cause sound waves that are higher
pitched and long strings cause sounds that are lower
pitched. Thinner strings also have a higher pitch than
thicker strings.
Wind instruments work by controlling the amount of air
that vibrates.
|
Picture from:
http://www.co-bw.com/Audio_Acoustic_Instruments.htm
|