-- Content --

• IsaacPhysics section on superpsotion has a quick subsection on beats
  https://isaacphysics.org/concepts/cp_superposition

• Hyperphysics

  • ​Beats definition
    http://hyperphysics.phy-astr.gsu.edu/hbase/sound/beat.html#c1
     

• A bit beyond the scope of algebra based physics, but goes very in depth with beats. Good illustration at the beginning through.
  http://www.feynmanlectures.caltech.edu/I_48.html

• Indiana Physics, Beats
  http://hep.physics.indiana.edu/~rickv/Beats.html

• University of Connecticut - Beats
  http://www.phys.uconn.edu/~gibson/Notes/Section5_5/Sec5_5.htm

• Lecture Slides for Beats and the Doppler Effect
  USCD Lecture slides for beats (includes Doppler Effect)
  https://boxsand.physics.oregonstate.edu/files/genphys/Media-2/Waves-and-...

• Physics Classroom - Beats and interference,
  http://www.physicsclassroom.com/class/sound/Lesson-3/Interference-and-Beats

• Beats and animations about beats
  http://www.animations.physics.unsw.edu.au/jw/beats.htm

• Beats with interactives,
  http://www.school-for-champions.com/science/sound_beat_frequencies.htm#....

-- Videos --

• https://www.youtube.com/watch?v=4M72kQulGKk

  • Bozeman on Beats ~5 mins

• https://www.youtube.com/watch?v=ylBne5guWOc

  • Brightstorm on Beats, conceptual video ~9 mins

• https://www.youtube.com/watch?v=1ZC4Rc3sYEw

  • ilectureonline on beat frequency, 3 mins

• https://www.youtube.com/watch?v=gHOC58L-53Q

  • PhysicsEH beats ~6 mins

• https://www.youtube.com/watch?v=IQ1q8XvOW6g

  • A little cheesy but pretty fun video on beats.

• https://www.youtube.com/watch?v=muLrRCfjUQY

  • Dan Fullerton. Pretty cut and dried explanation. He does a little bit of math too to help explain what's going on.

-- Simulations --

• http://www.upscale.toronto.edu/GeneralInterest/Harrison/Flash/ClassMecha...

  • A sort of simulation with good examples of what beats look and sound like

• http://www.physics.louisville.edu/cldavis/phys298/notes/beats.html

  • Mostly info but pretty good sim at the end

• http://www.muskingum.edu/~richardt/js/beats/

  • 3 frequencies that you can play at once and adjust to hear the beats

• http://www.cabrillo.edu/~jmccullough/Applets/Flash/Fluids,%20Oscillation...

  • Music physics. Kind of for fun but still illustrates some important concepts.

• http://physics.bu.edu/~duffy/HTML5/beats.html

  • Graphical representation of beats

• http://ibphysicsstuff.wikidot.com/beats

  • Another tone comparison thing. Shows graph of each tone, shows graph of sum of both tones, and you can play them too.