Answer: The waveform (harmonics present).
- A Fundamental frequency alone
- B Speed of sound in air
- C Amplitude of the wave only
- D The waveform (harmonics present)
Correct answer: D. The waveform (harmonics present)
Explanation: Timbre depends on the number and relative strength of overtones, i.e. the overall waveform. This is why the same note on a flute and a violin sounds different.
A standing wave forms from two identical waves travelling in opposite directions and interfering; nodes (always zero displacement) and antinodes (maximum displacement) stay fixed in place, unlike a travelling wave where the whole pattern moves.
Concept context
Wave types, superposition, standing waves, Doppler effect, and sound intensity.