411 REFERENCE · Wiktionary
Shepard tone
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
For Roger Shepard, American scientist.
Noun
en music A superposition of sine waves, separated by an octave, whose relative amplitude may be varied to give the illusion of a rising or falling note.
Related terms
en Shepard scale
en eponyms