Subvocal Input

An input method that uses very quiet or nearly silent vocalisations — sounds produced with minimal vocal effort that are typically inaudible to nearby people. Subvocal input includes techniques such as humming, whispering, or producing sounds detectable only by bone-conduction microphones placed in contact with the body. This approach is valuable for accessibility because it requires significantly less physical effort and articulatory precision than speech, making it usable by some people who cannot produce intelligible speech. Subvocal input is also language-independent when based on pitch patterns rather than words, and is socially unobtrusive, allowing use in public settings where voice commands would be disruptive or embarrassing.