"Sound envelope components":
Envelope Of Sound
envelope of sound is composed of a sound's attack, sustain, and
The way a sound is initiated is called attack.
There are two types of attack:
The closer the attack of a sound (A) is to the peak (B) of a sound, the faster its attack is.
Sounds that have a fast attack are..
o door slams
Sounds that have a slow attack take longer to build to the sustain level.
Sounds that have a slow attack are…
o a dog's short warning growl prior to bark
o stepping on a dry leaf
o slowly tearing a sheet of paper
o closing a door slowly
o an entire thunderclap
The entire thunderclap has a time span of approximately five seconds.
By starting the sound at point A, the audience is prepared for the impending thunderclap.
To have a frightening sudden clap of thunder, the slow attack has to be changed to a fast attack.