Ear: To put a flag up on the side of a lighting unit to block light. Better known as a 'sider'. (Grip/Lighting)

EBU: European Broadcast Union. This generally identifies a 25 FPS time code standard.

Echo: A sound wave that has been reflected and returned with sufficient magnitude and delay to be perceived as a wave distinct from that which was initially transmitted.

Edge Numbers: Coded numbers printed along the edged of a strip of film for identification purposes.

Edge track: A standard position for the placement of the audio on a single perforation magnetic film.

Edison Plug: An ordinary household plug with two flat blades and a ground pin. (Lighting)

Edit Decision List (EDL): The list of SMPTE codes, in footage and frames, and including instructions for fades, dissolves and other special effects which corresponds to all the segments that the editor of a film or videotape production has decided to use in the final cut.

Edit Master: Video industry term for the tape containing the finished (edited) program.

Edit Points: Also known as "edit in" and "edit out." The beginning and end points of an edit when a video program or soundtrack is being assembled.

Effective Output Level: The microphone sensitivity rating defined as the ratio in dB of the power available relative to sound pressure. (Acoustics)

Emulsion: The gelatine layer of photo-sensitive material in which the image is formed on film. (Film)

Envelope: The shape of the graph as amplitude is plotted against time. A sound's envelope includes its attack, decay, sustain and release (ADSR). (Sound)

Environmental Sound: General low level sound coming from the action of a film, which can either synchronous or nonsynchronous.

Equalization: The alteration of sound frequencies for a specific purpose, such as to remove 'noise' frequencies or to improve speech clarity.

Equivalent Noise: A microphone in a completely silent room still generates some residual noise. This noise can be measured and can be computed. That computation is the 'Equivalent Noise'. (Acoustics)

Establishing Shot: Usually a long shot at the beginning of a scene which is intended to inform the audience about a changed locale or time for the scene which follows. (Production)

Exciter Lamp: An incandescent lamp used to supply nonvarying luminous energy to a photoresponsive cell. Used in film projectors to illuminate the optical sound track.