# Harmonic series (music): Quiz

Question 1: The fourth harmonic vibrates at four times the frequency of the fundamental and sounds a ________ above the third (two octaves above the fundamental).
Perfect fifthPerfect fourthSemitoneInterval (music)

Question 2: If the harmonics are transposed into the span of one ________, they approximate some of the notes in what the West has adopted as the chromatic scale based on the fundamental tone.
FifteenthOctaveSemitoneInterval (music)

Question 3: In terms of frequency (measured in cycles per second, or ________ (Hz) where f is the fundamental frequency), the difference between consecutive harmonics is therefore constant and equal to the fundamental.
Pascal (unit)VoltJouleHertz

Question 4: On the other hand, the octave series is a ________ (2×f, 4×f, 8×f, 16×f, ...), and we hear these distances as "the same" in the sense of musical interval.
Complex numberPrime numberExponential functionGeometric progression

Question 5: The musical ________ of a steady tone from such an instrument is determined by the relative strengths of each harmonic.
OperaTimbreChest voiceColoratura

Question 6: Pitched musical instruments are often based on an approximate ________ such as a string or a column of air, which oscillates at numerous frequencies simultaneously.
DampingClassical mechanicsSimple harmonic motionHarmonic oscillator

Question 7: Thus shorter-wavelength, higher-frequency ________ occur with varying prominence and give each instrument its characteristic tone quality.
Dispersion (water waves)LightWaveOptics

Question 8: At these resonant frequencies, waves travel in both directions along the string or air column, reinforcing and canceling each other to form ________.
Standing waveResonatorResonanceNode (physics)

Question 9: The second harmonic (or first overtone), twice the frequency of the fundamental, sounds an ________ higher; the third harmonic, three times the frequency of the fundamental, sounds a perfect fifth above the second.
OctaveSemitoneFifteenthInterval (music)

Question 10: Theoretically, these shorter wavelengths correspond to ________ at frequencies that are 2, 3, 4, 5, 6, etc., times the fundamental frequency.
EnergyVibrationForceDamping