Standing waves occur at all integer multiples of a fundamental frequency

Evidence

Any multiple of half wavelengths will also fit between the two reflectors, and so there is in theory an infinite number of frequencies at which standing waves occur that are all multiples of flowest. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 396

Categorization

• XREF: connects to: Any waveform can be exactly modeled by combining sine waves — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 443