Two flutes play notes of 523 Hz and 527 Hz. The listener hears:

  1. two separate notes
  2. 4 beats per second at a pitch of about 525 Hz
  3. 1050 Hz
  4. 8 beats per second
Answer

B) 4 beats per second at a pitch of about 525 Hz

Beat frequency = difference; pitch = average. SLO P-11-D-16 · Application

Physics MCQ · More Superposition, Stationary Waves and Beats MCQs · Practise