Amplitude does not affect the period of a sinusoidally vibrating object

Evidence

Galileo remarks that the period of the pendulum does not depend on the mass of the bob nor the amplitude of its swing, unless it exceeds 90 degrees. In fact, the period of the pendulum is very nearly but not exactly independent of the amplitude for small amplitudes, but by 90 degrees and more it starts to increase significantly. — Eric J. Heller, Why You Hear What You Hear- An…, 291 (#qualifies, via linked claim)

Categorization

• XREF: connects to: Sinusoidal vibration is the fundamental atom of all sound; The period of a sinusoid is the inverse of its frequency; Pendulum period is only approximately amplitude-independent for small swings — Eric J. Heller, Why You Hear What You Hear- An…, 291

Broader Connections

• Pendulum period is only approximately amplitude-independent for small swings #qualifies (0.95) — Eric J. Heller, Why You Hear What You Hear- An…, 291
• The period of a sinusoid is the inverse of its frequency #expands (0.80)