In every direction, especially of an antenna capable of transmitting or receiving signals in all directions, or of a microphone capable of detecting sound from all directions
Refers to the characteristic of some bar code formats to be able to read regardless of orientation, or to the characteristics of some readers to read a bar code regardless of the bar code's orientation to the reader
Literally, from all directions In audio, microphones are said to be omnidirectional if they can detect sound equally from all directions Speakers are omnidirectional if they radiate sound in all directions equally; this tends to be the case with subwoofers and low frequency drivers Low frequencies, in general, tend to be omnidirectional, versus high frequencies which tend to "beam" or be very directional
All hearing aid systems which use a single microphone opening are considered to be omnidirectional These pick-up sound, in theory, equally from all directions Both digital and analog hearing aids can be omnidirectional