Aliasing creates signal components that never existed in the original

Evidence

When the frequency gets high enough that the spacing between the point sources becomes greater than half a wavelength, the array becomes undersampled. Under these conditions, one gets spatial aliasing, which results in multiple main lobes. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2890 (#exemplifies, via linked claim)

If the waveform changes as a function of signal or sound level those changes are non-linear distortions—these non-linear mechanisms add frequencies to the signal that were not there originally and are especially objectionable if they are high enough to be audible. — Toole, Floyd E, Sound reproduction- the acoustics and…, 946 (#complicates, via linked claim)

Categorization

• XREF: connects to: Undersampled signals alias because high-frequency components mirror below the Nyquist frequency — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 404; Adjacent-band aliasing cancels by opposite phase when bands are unmodified; Nonlinear distortion adds frequencies that were not in the original signal — Toole, Floyd E, Sound reproduction- the acoustics and…, 946 (+3 more)

Related

• Array spacing beyond half a wavelength causes spatial aliasing with multiple lobes (similarity 0.86)
• Undersampled signals alias because high-frequency components mirror below the Nyquist frequency (similarity 0.85)
• Speaker spacing below half a wavelength to avoid aliasing is practically prohibitive (similarity 0.82)
• Multiplying element and array patterns can eliminate spatial aliasing without a physical line source (similarity 0.79)
• Full-bandwidth array directivity is practically infeasible due to aliasing cost (similarity 0.78)

Broader Connections

• Array spacing beyond half a wavelength causes spatial aliasing with multiple lobes #exemplifies (0.92) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2890
• Adjacent-band aliasing cancels by opposite phase when bands are unmodified #expands (0.85)
• Nonlinear distortion adds frequencies that were not in the original signal #complicates (0.82) — Toole, Floyd E, Sound reproduction- the acoustics and…, 946
• Non-linear and time-variant systems generate frequency components absent from the input #expands (0.80) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 358
• Perfect pattern control across the audio range is physically infeasible due to aliasing cost #corroborates (0.75)