Sound Energy Moves through the air until it is either…
Reflected or Absorbed
The process of… and … is how sound waves are created
Compression and Rarefaction
A Waveform is shown on a
Timeline
The Relative Amplitude is shown on the
Vertical Axis
The Pitch is what we call…
Frequency
What is the Simplest Representation of an audio signal
Sine Wave
The Character of the sound is called
Timbre
The Shape of the waveform is determined by a series of what?
Harmonics
Audio Frequency is measured in
Hertz (Hz)
The human ear can here from
20Hz- 20,000Hz (20Hz-20KHz)
The size of the waveform is determined by
The Frequency (pitch)
Amplitude determines the…
The volume of a Waveform
Amplitude is Measured in
Decibels (dB)
Humans can hear a range about
120db (pin drop - Roaring Jet Engine)
Don’t listen to prolonged sounds at about…
85dB
Every 3dB the SPL…
Doubles
