The object that produces the wave or disturbance.


A laboratory acoustic source is normally an acoustic monopole or at least behaves as one over a range of frequencies and is used for measurements of sound propagation, transfer functions or simply as a defined source.


This can be a voltage or current source and may be DC or a waveform generator.


Light emitting diode or Laser diode that emits light for launch into an optical fibre. Characterized by its central wavelength and spectral width.

See also: Acoustic Sources, Extended Source, Point Source.

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Subjects: Audio Electronics Noise & Vibration Physics