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Early Reflections - The first echoes in a room, caused by the sound from the sound source reflecting off one surface before reaching the listener.
Echo - 1) One distinct repeat of a sound because of the sound reflecting off a surface. 2) Loosely, used to mean reverberation (the continuing of a sound after the source stops emitting it, caused by many discrete echoes closely spaced in time).
Editing - 1) Changing the sequence of a recording by cutting the recording tape and putting the pieces together in the new sequence with splicing tape. 2) Punching in and then punching out on one or more tracks of a multitrack tape recorder to replace previously recorded performances. 3) Changing the sequence of a digital recording's playback by computer program.
Effects - 1) Various ways an audio signal can be modified by adding something to the signal to change the sound. 2) Short for the term Sound Effects (sounds other than dialogue, narration or music like door closings, wind, etc. added to film or video shots).
Effects Track - 1) In film production audio, a recording of the mixdown of all the sound effects for the film ready to be mixed with the dialogue and music. 2) In music recording, one track with a recording of effects to be added to another track of a multitrack recording.
Electret Condenser - A condenser microphone that has a permanently polarized (charged) variable capacitor as its sound pressure level sensor.
Electric Instrument - Any musical instrument that puts out an electrical signal rather than an acoustic sound.
Engineer - 1) A technician in charge of a recording session; Also called Recording Engineer. 2) A person with an engineering degree. 3) A person with sufficient experience in the field to be equivalent to the education one would receive earning an engineering degree.
Envelope - 1) How a sound or audio signal varies in intensity over a time span. 2) How a control voltage varies in level over time controlling a parameter of something other than gain or audio level.
Equalization - Any time the amplitude of audio signals at specific set of frequencies are increased or decreased more than the signals at other audio frequencies.
Expansion - The opposite of compression; for example, an expander may allow the signal to increase 2 dB every time the signal input increased by 1 dB.
Expansion Ratio - How many dB the output signal will drop for every 1dB fall in the input signal below the threshold.
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