What does binaural mean?
Binaural is an adjective meaning relating to or involving both ears, whether in the physiology of human hearing or in the technology of sound recording and playback. In everyday use it most often describes a recording technique that places two microphones — sometimes in an artificial head — where human ears would be, capturing the tiny differences in timing and volume that allow the brain to locate sounds in space. Played back through headphones, a true binaural recording can feel startlingly three-dimensional, as though the listener were physically present at the performance. The word also features prominently in 'binaural beats', a popular form of audio said to aid relaxation and focus by playing slightly different tones in each ear. Precise and scientific in tone, binaural contrasts directly with monaural, which concerns a single ear or channel.
Relating to, involving, or perceived by both ears.
"Binaural hearing allows us to pinpoint where a sound is coming from."
This is the primary sense in physiology and psychoacoustics.
(Of recorded or reproduced sound) made or played back using two separate channels so as to reproduce the natural spatial perception of two-eared hearing.
"The podcast released a special binaural episode best experienced with headphones."
In this sense binaural is distinct from ordinary stereo, which does not necessarily preserve ear-specific spatial cues.
Binaural recordings can trick your brain into hearing sounds behind you — even though the music is coming from inside your head.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of binaural
Binaural derives from Latin, combining the prefix bi-, meaning 'two' or 'twice', with auris, meaning 'ear', via the Late Latin adjective binauralis. It entered English usage in the nineteenth century alongside developments in the study of hearing and, later, sound recording technology. It shares its Latin roots with related coinages such as binocular (from oculus, 'eye'), which follows the same 'two + sensory organ' pattern.
How binaural is actually used
Binaural is a technical term most at home in acoustics, audiology, psychoacoustics, and high-end audio production. In everyday speech it appears mainly in the phrase 'binaural beats', associated with meditation and relaxation audio. It carries a neutral, scientific register and is not used figuratively.
Easily confused with binaural
Monaural refers to sound involving only one ear or a single channel, whereas binaural involves two ears or channels working together to create spatial depth.
Stereophonic describes any two-channel audio reproduction for speakers, while binaural specifically captures or reproduces the natural differences in timing and intensity between the two ears, typically requiring headphones.