The Four Fundamental Qualities of Sound: Intensity, Pitch, Timbre and Duration
Fundamental Qualities of Sound
1. Intensity
Intensity refers to the amount of acoustic energy a sound contains, determining whether it is perceived as loud or soft. It is dictated by power and amplitude. For humans to perceive a sound, it must exceed the threshold of hearing (0 dB) without reaching the threshold of pain (140 dB). This quality is measured using a sound level meter, with results expressed in decibels (dB), named in honor of Alexander Graham Bell.
2. Pitch
Pitch indicates whether a sound is low (bass), medium, or high (treble). It is determined by the fundamental frequency of sound waves, measured in hertz (Hz):
- Low Pitch: Slow vibration = low frequency.
- High Pitch: Fast vibration = high frequency.
The human audible frequency range is...