Waves and Oscillations

Beats

Pulsing of two close tones

  • High school
  • about 3 min
  • 5 of 5 in the family
Not started
━ sum of both tones- - beat envelope

Parameters

fbeat=∣f1−f2∣=0.5 Hzf_{beat} = |f_1 - f_2| = 0.5\,\text{Hz}

• Two close tones alternately reinforce and cancel • Loudness pulses at frequency |f₁ - f₂| • f₁ = f₂ -> the beats disappear (try it!)