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The octave illusion is an auditory illusion discovered by Diana Deutsch in 1973. It is produced when two tones that are an octave apart are repeatedly played in alternation ("high-low-high-low") through stereo headphones. The same sequence is played to both ears simultaneously; however when the right ear receives the high tone, the left ear ...
Monkeys experience octave equivalence, and its biological basis apparently is an octave mapping of neurons in the auditory thalamus of the mammalian brain. [12] Studies have also shown the perception of octave equivalence in rats, [13] human infants, [14] and musicians [15] but not starlings, [16] 4–9-year-old children, [17] or non-musicians.
Pedro Patricio observed in 2012 that, by using a Shepard tone as a sound source and applying it to a melody, he could reproduce the illusion of a continuously ascending or descending movement characteristic of the Shepard Scale. Regardless of the tempo and the envelope of the notes, the auditory illusion is effectively maintained. The ...
The terms sounding range, written range, designated range, duration range and dynamic range have specific meanings. The sounding range [ 3 ] refers to the pitches produced by an instrument, while the written range [ 3 ] refers to the compass (span) of notes written in the sheet music, where the part is sometimes transposed for convenience.
However, experiments show evidence that even when using headphones providing a single pure tone to each ear separately, listeners may still hear a difference tone [citation needed]. Since the peculiar non-linear physics of the ear doesn't come into play in this case, it is thought that this must be a separate, neural phenomenon. Compare ...
Falsetto (/ f ɔː l ˈ s ɛ t oʊ, f ɒ l-/ fawl-SET-oh, fol-, Italian:; Italian diminutive of falso, "false") is the vocal register occupying the frequency range just above the modal voice register and overlapping with it by approximately one octave.
It can extend down from the regular vocal range an octave and further below when well controlled. It can be described as having a stable vocal fry-like sound. These pitches are produced by a combination of oscillations of turbulent airflow in the vocal tract. Coming from multiple sound sources such as the true and false vocal chords [citation ...
In general, frequency components of a sound determine its "color", its timbre. When speaking about the frequency (in singular) of a sound, it means the property that most determines its pitch. [6] Higher pitches have higher frequency, and lower pitches are lower frequency. The frequencies an ear can hear are limited to a specific range of ...